namelist_definition.xml

<?xml version="1.0"?>

<?xml-stylesheet type="text/xsl" href="http://www.cgd.ucar.edu/~cam/namelist/namelist_definition_CAM.xsl"?>

<namelist_definition>

<!-- Each namelist variable is defined in an <entry> element.  The
     content of the element is the documentation of how the variable is
     used.  Other aspects of the variable's definition are expressed as
     attributes of the <entry> element.  Note that it is an XML requirement
     that the attribute values are enclosed in quotes.  The attributes are:

     id
          The variable's name.  *** N.B. *** The name must be lower case.
          The module convert all namelist variable names to lower case
          since Fortran is case insensitive.

     type
          An abbreviation of the fortran declaration for the variable.
	  Valid declarations are:

          char*n  
	  integer
	  logical
	  real

	  Any of these types may be followed by a comma separated list of
	  integers enclosed in parenthesis to indicate an array.

	  The current namelist validation code only distinquishes between
	  string and non-string types.

     input_pathname
          Only include this attribute to indicate that the variable
          contains the pathname of an input dataset that resides in the
          CCSM inputdata directory tree.  Note that the variables
          containing the names of restart files that are used in branch
          runs don't reside in the inputdata tree and should not be given
          this attribute.

	  The recognized values are "abs" to indicate that an absolute
          pathname is required, or "rel:var_name" to indicate that the
          pathname is relative and that the namelist variable "var_name"
          contains the absolute root directory.

     category
          A category assigned for organizing the documentation.

     group
          The namelist group that the variable is declared in.

     valid_values
          This is an optional attribute that is mainly useful for variables
          that have only a small number of allowed values.
                                                                        -->

<!-- Aerosols: Data (CAM version) -->

<entry id="bndtvaer" type="char*256" input_pathname="abs" category="aero_data_cam"
       group="cam3_aero_data_nl" valid_values="" >
Full pathname of time-variant boundary dataset for aerosol masses.
Default: set by build-namelist.
</entry>

<entry id="cam3_aero_data_on" type="logical" category="aero_data_cam"
       group="cam3_aero_data_nl" valid_values="" >
Add CAM3 prescribed aerosols to the physics buffer.
Default: FALSE
</entry>

<!-- Coupler between Physics and Dynamics -->

<entry id="phys_alltoall" type="integer"  category="perf_dp_coup"
       group="cam_inparm" valid_values="0,1,2,11,12,13">
Dynamics/physics transpose method for nonlocal load-balance.  0: use
mpi_alltoallv. 1: use point-to-point MPI-1 two-sided implementation. 2: use
point-to-point MPI-2 one-sided implementation if supported, otherwise use
MPI-1 implementation. 3: use Co-Array Fortran implementation if supported,
otherwise use MPI-1 implementation. 11-13: use mod_comm, choosing any of
several methods internal to mod_comm.  The method within mod_comm (denoted
mod_method) has possible values 0,1,2 and is set according to mod_method =
phys_alltoall - modmin_alltoall, where modmin_alltoall is 11. -1: use 
option 1 when each process communicates with less than half of the other 
processes, otherwise use option 0 (approx.).
Default: -1
</entry>

<entry id="phys_chnk_per_thd" type="integer"  category="perf_dp_coup"
       group="cam_inparm" valid_values="">
Select target number of chunks per thread.  Must be positive.
Default: 1
</entry>

<entry id="phys_loadbalance" type="integer"  category="perf_dp_coup"
       group="cam_inparm" valid_values="">
Physics grid decomposition options.
-1: each chunk is a dynamics block.
 0: chunk definitions and assignments do not require interprocess comm.
 1: chunk definitions and assignments do not require internode comm.
 2: optimal diurnal, seasonal, and latitude load-balanced chunk definition and assignments.
 3: chunk definitions and assignments only require communication with one other process.
 4: concatenated blocks, no load balancing, no interprocess communication.
Default: 0
</entry>

<entry id="phys_twin_algorithm" type="integer"  category="perf_dp_coup"
       group="cam_inparm" valid_values="">
Physics grid decomposition options.
 0: assign columns to chunks as single columns, wrap mapped across chunks
 1: use (day/night; north/south) twin algorithm to determine load-balanced pairs of
      columns and assign columns to chunks in pairs, wrap mapped
Default: 0 for unstructured grid dycores, 1 for lat/lon grid dycores
</entry>

<!-- Diagnostics -->

<entry id="history_amwg" type="logical"  category="diagnostics"
       group="phys_ctl_nl" valid_values="" >
Switch for diagnostic output of AMWG diag package variables
Default: .true.
</entry>

<entry id="diag_cnst_conv_tend" type="char*8"  category="diagnostics"
       group="cam_diag_opts" valid_values="none,q_only,all" >
Output constituent tendencies due to convection.  Set to
'none', 'q_only' or 'all'.
Default: 'q_only', but 'none' for WACCM configurations.
</entry>

<entry id="do_circulation_diags" type="logical"  category="diagnostics"
       group="circ_diag_nl" valid_values="" >
Turns on TEM circulation diagnostics history output.  Only valid for FV dycore.

Default: .true. for WACCM with interactive chemistry, otherwise .false.
</entry>

<entry id="print_energy_errors" type="logical"  category="diagnostics"
       group="cam_inparm" valid_values="" >
Turn on verbose output identifying columns that fail energy/water 
conservation checks.
Default: FALSE
</entry>

<!-- Dry Convective Adjustment -->

<entry id="nlvdry" type="integer"  category="dry_conv_adj"
       group="cam_inparm" valid_values="" >
Number of layers from the top of the model over which to do dry convective
adjustment. Must be less than plev (the number of vertical levels).
Default: 3
</entry>

<!-- Dynamics: Finite Volume -->

<entry id="ct_overlap" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Overlapping of trac2d and cd_core subcycles.
Default: 0
</entry>

<entry id="fft_flt" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="0,1" >
1 for FFT filter always, 0 for combined algebraic/FFT filter.  The value 0
is used for CAM3, otherwise it is using the value 1.  In the CAM3
version of the model it was necessary to build with the CPP
variable ALT_PFT defined to get the behavior now obtained by setting fft_flt=1.
Default: set by build-namelist
</entry>

<entry id="div24del2flag" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="2,4,42" >
Chooses type of divergence damping and velocity diffusion.
div24del2flag = 2 for ldiv2 (default),
              = 4 for ldiv4,
              = 42 for ldiv4 + ldel2
where
ldiv2: 2nd-order divergence damping everywhere and increasing in top layers
ldiv4: 4th-order divergence damping
ldel2: 2nd-order velocity-component damping targetted to top layers,
       with coefficient del2coef

Default: set by build-namelist
</entry>

<entry id="del2coef" type="real"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Chooses level of velocity diffusion.
Default: 3.0e5
</entry>

<entry id="filtcw" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="0,1" >
Enables optional filter for intermediate c-grid winds, (courtesy of Bill Putman).
Default: 0
</entry>

<entry id="force_2d" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Set to 1 to force the 2D transpose computation when a 1D decomposition is
used.  This is intended for debugging purposes only.
Default: 0
</entry>

<entry id="geopktrans" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="0,1,2" >
Geopotential method (routines geopk, geopk16, or geopk_d).
0 for transpose method, 1 for method using semi-global z communication 
with optional 16-byte arithmetic, 2 for method using local
z communication; method 0, method 1 with 16-byte arithmetic and method 2 
are all bit-for-bit across decompositions; method 0 scales better than 
method 1 with npr_z, and method 1 is superior to method 0 for small npr_z.
The optimum speed is attained using either method 1 with 8-byte 
arithmetic (standard for geopk16) or method 2 when utilizing the 
optimal value for the associated parameter geopkblocks; for the last 
two subcycles of a timestep, method 0 is automatically used; see 
geopk.F90 and cd_core.F90.

Default: 0
</entry>

<entry id="geopkblocks" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Geopotential method 2 pipeline parameter (routine geopk_d).
geopk_d implements a pipeline algorithm by dividing the 
information that must be moved between processes into blocks. geopkblocks
specifies the number of blocks to use. The larger the number of blocks,
the greater the opportunity for overlapping communication with computation
and for decreasing instantaneous bandwidth requirements. The smaller the
number of blocks, the fewer MPI messages sent, decreasing MPI total latency.
See geopk_d within geopk.F90.
Default: 1
</entry>

<entry id="modc_sw_dynrun" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Mod_comm irregular underlying communication method for dyn_run/misc.
0 for original mp_sendirr/mp_recvirr
1 for mp_swapirr and a point-to-point implementation of communication pattern
2 for mp_swapirr and a collective (MPI_Alltoallv) implementation of communication pattern
Default: 0
</entry>

<entry id="modc_hs_dynrun" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication handshaking for dyn_run/misc
Default: .true.
</entry>

<entry id="modc_send_dynrun" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication blocking send for dyn_run/misc,
false for nonblocking send
Default: .true.
</entry>

<entry id="modc_mxreq_dynrun" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Maximum number of outstanding nonblocking MPI requests to allow when
using mp_swapirr and point-to-point communications for dyn_run/misc. 
Setting this less than the maximum can improve robustness for large process 
count runs. If set to less than zero, then do not limit the number of
outstanding send/receive requests.
Default: -1 (so no limit)
</entry>

<entry id="modc_sw_cdcore" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Mod_comm irregular underlying communication method for cd_core/geopk
0 for original mp_sendirr/mp_recvirr
1 for mp_swapirr and a point-to-point implementation of communication pattern
2 for mp_swapirr and a collective (MPI_Alltoallv) implementation of communication pattern
Default: 0
</entry>

<entry id="modc_hs_cdcore" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication handshaking for cd_core/geopk
Default: .true.
</entry>

<entry id="modc_send_cdcore" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for geopk_d and mod_comm irregular communication blocking send for 
cd_core/geopk; false for nonblocking send.
Default: .true.
</entry>

<entry id="modc_mxreq_cdcore" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Maximum number of outstanding nonblocking MPI requests to allow when
using mp_swapirr and point-to-point communications for cd_core/geopk.
Setting this less than the maximum can improve robustness for large process 
count runs. If set to less than zero, then do not limit the number of
outstanding send/receive requests.
Default: -1 (so no limit)
</entry>

<entry id="modc_sw_gather" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Mod_comm irregular underlying communication method for gather
0 for original mp_sendirr/mp_recvirr
1 for mp_swapirr and a point-to-point implementation of communication pattern
2 for mp_swapirr and a collective (MPI_Alltoallv) implementation of communication pattern
Default: 0
</entry>

<entry id="modc_hs_gather" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication handshaking for gather
Default: .true.
</entry>

<entry id="modc_send_gather" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication blocking send for gather,
false for nonblocking send
Default: .true.
</entry>

<entry id="modc_mxreq_gather" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Maximum number of outstanding nonblocking MPI requests to allow when
using mp_swapirr and point-to-point communications for gather.
Setting this less than the maximum can improve robustness for large process 
count runs. If set to less than zero, then do not limit the number of
outstanding send/receive requests.
Default: -1 (so no limit)
</entry>

<entry id="modc_sw_scatter" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Mod_comm irregular underlying communication method for scatter
0 for original mp_sendirr/mp_recvirr
1 for mp_swapirr and a point-to-point implementation of communication pattern
2 for mp_swapirr and a collective (MPI_Alltoallv) implementation of communication pattern
Default: 0
</entry>

<entry id="modc_hs_scatter" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication handshaking for scatter
Default: .true.
</entry>

<entry id="modc_send_scatter" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication blocking send for scatter,
false for nonblocking send
Default: .true.
</entry>

<entry id="modc_mxreq_scatter" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Maximum number of outstanding nonblocking MPI requests to allow when
using mp_swapirr and point-to-point communications for scatter.
Setting this less than the maximum can improve robustness for large process 
count runs. If set to less than zero, then do not limit the number of
outstanding send/receive requests.
Default: -1 (so no limit)
</entry>

<entry id="modc_sw_tracer" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Mod_comm irregular underlying communication method for multiple tracers
0 for original mp_sendtrirr/mp_recvtrirr
1 for mp_swaptrirr and point-to-point communications
2 for mp_swaptrirr and all-to-all communications
Default: 0
</entry>

<entry id="modc_hs_tracer" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication handshaking for multiple tracers
Default: .true.
</entry>

<entry id="modc_send_tracer" type="logical"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
True for mod_comm irregular communication blocking send for multiple
tracers, false for nonblocking send
Default: .true.
</entry>

<entry id="modc_mxreq_tracer" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Maximum number of outstanding nonblocking MPI requests to allow when
using mp_swaptrirr and point-to-point communications for multiple tracers.
Setting this less than the maximum can improve robustness for large process 
count runs. If set to less than zero, then do not limit the number of
outstanding send/receive requests.
Default: -1 (so no limit)
</entry>

<entry id="modc_onetwo" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
One or two simultaneous mod_comm irregular communications (excl. tracers)
Default: 1
</entry>

<entry id="modc_tracers" type="integer"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
Max number of tracers for simultaneous mod_comm irregular communications
Default: 1
</entry>

<entry id="iord" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Order (mode) of X interpolation (1,..,6).
East-West transport scheme (used with Finite Volume dynamical core only).
Default: 4
</entry>

<entry id="jord" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Order (mode) of Y interpolation (1,..,6).
North-South transport scheme (used with Finite Volume dynamical core only).
Default: 4
</entry>

<entry id="kord" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Scheme to be used for vertical mapping.
Default: 4
</entry>

<entry id="modcomm_gatscat" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="0,1,2" >
For mod_comm gather/scatters, 0 for temporary contiguous buffers; 1 for mpi derived
types.
Default: 0
</entry>

<entry id="modcomm_geopk" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="0,1,2" >
For geopk (geopktrans=1) messages, 0 for temporary contiguous buffers; 1 for mpi derived
types.
Default: 0
</entry>

<entry id="modcomm_transpose" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="0,1,2" >
For mod_comm transposes, 0 for temporary contiguous buffers; 1 for mpi derived
types.
Default: 0
</entry>

<entry id="npr_yz" type="integer(4)"  category="dyn_fv"
       group="spmd_fv_inparm" valid_values="" >
A four element integer array which specifies the YZ and XY decompositions.
The first two elements are the number of Y subdomains and number of Z
subdomains in the YZ decomposition.  The second two elements are the number
of X subdomains and the number of Y subdomains in the XY decomposition.
Note that both the X and Y subdomains must contain at least 3 grid points.
For example, a grid with 96 latitudes can contain no more than 32 Y
subdomains.  There is no restriction on the number of grid points (levels)
in a Z subdomain, but note that the threading parallelism in the FV dycore
is over levels, so for parallel efficiency it is best to have at least the
number of levels in each Z subdomain as there are threads available.

There are a couple of rough rules of thumb to follow when setting the 2D
decompositions.  The first is that the number of Y subdomains in the YZ
decomposition should be the same as the number of Y subdomains in the XY
decomposition (npr_yz(1) == npr_yz(4)).  The second is that the total
number of YZ subdomains (npr_yz(1)*npr_yz(2)) should equal the total number
of XY subdomains (npr_yz(3)*npr_yz(4)).

Default: ntask,1,1,ntask where ntask is the number of MPI tasks.  This is a
1D decomposition in latitude.
</entry>

<entry id="nsplit" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Number of dynamics timesteps per physics timestep. If zero, a best-estimate
will be automatically calculated.
Default: 0
</entry>

<entry id="nspltrac" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Number of tracer advection timesteps per physics timestep.
Nsplit is partitioned into nspltrac and nsplit/nspltrac,
with the latter being the number of dynamics timesteps per
tracer timestep, possibly rounded upward; after initialization,
the code quantity nsplit is redefined to be the number of
dynamics timesteps per tracer timestep.
Default: 0
</entry>

<entry id="nspltvrm" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Number of vertical re-mapping timesteps per physics timestep.
Nspltrac is partitioned into nspltvrm and nspltrac/nspltvrm,
with the latter being the number of tracer timesteps per
re-mapping timestep, possibly rounded upward; after initialization,
the code quantity nspltrac is redefined to be the number of
tracer timesteps per re-mapping timestep.
Default: 0
</entry>

<entry id="trac_decomp" type="integer"  category="dyn_fv"
       group="dyn_fv_inparm" valid_values="" >
Size of tracer domain decomposition for trac2d.
Default: 1
</entry>


<!-- Dynamics: Finite Volume: Offline -->

<entry id="met_cell_wall_winds" type="logical"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
TRUE =&gt; the offline meteorology winds are defined on the model grid cell walls.
Default: FALSE
</entry>

<entry id="met_data_file" type="char*256" input_pathname="rel:met_data_path" category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
Name of file that contains the offline meteorology data.
Default: none
</entry>

<entry id="met_data_path" type="char*256" input_pathname="abs" category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
Name of directory that contains the offline meteorology data.
Default: none
</entry>

<entry id="met_filenames_list" type="char*256" input_pathname="abs" category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
Name of file that contains names of the offline meteorology data files.
Default: none
</entry>

<entry id="met_remove_file" type="logical"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
TRUE =&gt; the offline meteorology file will be removed from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="met_rlx_top" type="real"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
(km) top of relaxation region of winds for offline waccm
Default: 
</entry>

<entry id="met_rlx_bot" type="real"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
(km) bottom of relaxation region of winds for offline waccm
Default:
</entry>

<entry id="met_max_rlx" type="real"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
maximum of vertical relaxation function in bottom portion
Default: 1.0
</entry>

<entry id="met_fix_mass" type="logical"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
switch to turn on/off mass fixer for offline driver 
Default: true
</entry>

<entry id="met_shflx_name" type="char*16"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
srf heat flux field name in met data file
Default:
</entry>

<entry id="met_qflx_name" type="char*16"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
water vapor flux field name in met data file
Default:
</entry>

<entry id="met_shflx_factor" type="real"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
multiplication factor for srf heat flux
Default: 1.0
</entry>

<entry id="met_qflx_factor" type="real"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
multiplication factor for water vapor flux
Default: 1.0
</entry>

<entry id="met_snowh_factor" type="real"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
multiplication factor for snow hieght
Default: 1.0
</entry>

<entry id="met_srf_feedback" type="logical"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
if false then do not allow surface models feedbacks influence climate
Default: true
</entry>

<entry id="met_srf_nudge_flux" type="logical"  category="dyn_fv_off"
       group="metdata_nl" valid_values="" >
if true nudge meteorology surface fields TAUX, TAUY, SHFLX, QFLX rather than force
Default: true
</entry>

<!-- Dynamics: Spectral -->

<entry id="eul_nsplit" type="integer"  category="dyn_spectral"
       group="dyn_spectral_inparm" valid_values="" >
Number of dynamics timesteps per physics timestep. If zero, a best-estimate
will be automatically calculated.
Default: 1
</entry>

<entry id="dif2" type="real"  category="dyn_spectral"
       group="dyn_spectral_inparm" valid_values="" >
del^2 horizontal diffusion coefficient. Default: resolution dependent,
e.g. 2.5e5 for T42 EUL.
</entry>

<entry id="dif4" type="real"  category="dyn_spectral"
       group="dyn_spectral_inparm" valid_values="">
del^4 horizontal diffusion coefficient. Default: resolution dependent,
e.g. 1.0e16 for T42 EUL.
</entry>

<entry id="divdampn" type="real"  category="dyn_spectral"
       group="dyn_spectral_inparm" valid_values="">
Number of days (from timestep 0) to run divergence damper. Use only if spectral
model becomes dynamicallly unstable during initialization. Suggested value:
2. (Value must be &gt;= 0.)  Default: 0.
</entry>

<entry id="dyn_allgather" type="integer"  category="dyn_spectral"
       group="spmd_dyn_inparm" valid_values="">
Spectral dynamics gather option.
Default: 0
</entry>

<entry id="dyn_alltoall" type="integer"  category="dyn_spectral"
       group="spmd_dyn_inparm" valid_values="">
Spectral dynamics transpose option.
Default: 0
</entry>

<entry id="dyn_equi_by_col" type="logical"  category="dyn_spectral"
       group="spmd_dyn_inparm" valid_values="">
Flag indicating whether to assign latitudes to equidistribute columns or
latitudes. This only matters when using a reduced grid.
Default: TRUE
</entry>

<entry id="dyn_npes" type="integer"  category="dyn_spectral"
       group="spmd_dyn_inparm" valid_values="">
Number of processes assigned to dynamics (SE, EUL and SLD dycores).
Default: Total number of processes assigned to job.
</entry>

<entry id="dyn_npes_stride" type="integer"  category="dyn_spectral"
       group="spmd_dyn_inparm" valid_values="">
Stride for dynamics processes (EUL and SLD dycores).
E.g., if stride=2, assign every second process to the dynamics.
Default: 1
</entry>

<entry id="eps" type="real"  category="dyn_spectral"
       group="dyn_spectral_inparm" valid_values="">
Time filter coefficient.  Default: 0.06
</entry>

<entry id="kmxhdc" type="integer"  category="dyn_spectral"
       group="dyn_spectral_inparm" valid_values="">
Number of levels over which to apply Courant limiter, starting at top of
model.
Default: 5
</entry>

<!-- Gravity Wave Drag -->

<entry id="fcrit2" type="real"  category="gw_drag"
       group="gw_drag_nl" valid_values="" >
Critical Froude number squared.
Default: set by build-namelist.
</entry>

<!-- Greenhouse Gases: CO2, CH4, N2O, CFC11, CFC12 (original CAM versions) -->

<entry id="bndtvghg" type="char*256" input_pathname="abs" category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
Full pathname of time-variant boundary dataset for greenhouse gas surface
values.
Default: set by build-namelist.
</entry>

<entry id="ch4vmr" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
CH4 volume mixing ratio.  This is used as the time invariant surface value
of CH4 if no time varying values are specified.
Default: set by build-namelist.
</entry>

<entry id="co2vmr" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
CO2 volume mixing ratio.  This is used as the time invariant surface value
of CO2 if no time varying values are specified.
Default: set by build-namelist.
</entry>

<entry id="co2vmr_rad" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
User override for the prescribed CO2 volume mixing ratio used by the radiation
calculation.  Note however that the prescribed value of CO2 which is sent
to the surface models is still the one that is set using either the 
<varname>co2vmr</varname> or the <varname>scenario_ghg</varname> variables.
Default: not used
</entry>

<entry id="f11vmr" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
CFC11 volume mixing ratio adjusted to reflect contributions from many GHG
species.  This is used as the time invariant surface value of F11 if no
time varying values are specified.
Default: set by build-namelist.
</entry>

<entry id="f12vmr" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
CFC12 volume mixing ratio.  This is used as the time invariant surface value
of CFC12 if no time varying values are specified.
Default: set by build-namelist.
</entry>

<entry id="n2ovmr" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
N2O volume mixing ratio.  This is used as the time invariant surface value
of N2O if no time varying values are specified.
Default: 0.311e-6
</entry>

<entry id="ghg_yearstart_data" type="integer"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
Data start year.  Use in conjunction
with <varname>ghg_yearstart_model</varname>.
Default: 0
</entry>

<entry id="ghg_yearstart_model" type="integer"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
Model start year.  Use in conjunction
with <varname>ghg_yearstart_data</varname>.
Default: 0
</entry>

<entry id="ramp_co2_annual_rate" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
Amount of co2 ramping per year (percent).  Only used
if <varname>scenario_ghg</varname> = 'RAMP_CO2_ONLY'
Default: 1.0
</entry>

<entry id="ramp_co2_cap" type="real"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
CO2 cap if &gt; 0, floor otherwise.  Specified as multiple or fraction of
inital value; e.g., setting to 4.0 will cap at 4x initial CO2 setting.
Only used if <varname>scenario_ghg</varname> = 'RAMP_CO2_ONLY'
Default: boundless if <varname>ramp_co2_annual_rate</varname> &gt; 0, zero otherwise.
</entry>

<entry id="ramp_co2_start_ymd" type="integer"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
Date on which ramping of co2 begins.  The date is encoded as an integer in
the form YYYYMMDD.  Only used if <varname>scenario_ghg</varname> = 'RAMP_CO2_ONLY'
Default: 0
</entry>

<entry id="rampyear_ghg" type="integer"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="" >
If <varname>scenario_ghg</varname> is set to "RAMPED" then the greenhouse
gas surface values are interpolated between the annual average values 
read from the file specified by <varname>bndtvghg</varname>.
In that case, the value of this variable (&gt; 0) fixes the year of the
lower bounding value (i.e., the value for calendar day 1.0) used in the
interpolation.  For example, if rampyear_ghg = 1950, then the GHG surface
values will be the result of interpolating between the values for 1950 and
1951 from the dataset.
Default: 0
</entry>

<entry id="scenario_ghg" type="char*16"  category="ghg_cam"
       group="chem_surfvals_nl" valid_values="FIXED,RAMPED,RAMP_CO2_ONLY" >
Controls treatment of prescribed co2, ch4, n2o, cfc11, cfc12 volume mixing
ratios.  May be set to 'FIXED' or 'RAMPED' or 'RAMP_CO2_ONLY'.
FIXED =&gt; volume mixing ratios are fixed and have either default or namelist
         input values.
RAMPED =&gt; volume mixing ratios are time interpolated from the dataset
          specified by <varname>bndtvghg</varname>.
RAMP_CO2_ONLY =&gt; only co2 mixing ratios are ramped at a rate determined by
                 the variables <varname>ramp_co2_annual_rate</varname>, <varname>ramp_co2_cap</varname>,
                 and <varname>ramp_co2_start_ymd</varname>.
Default: FIXED
</entry>

<!-- Greenhouse Gases: prognostic CH4, N2O, CFC11, CFC12 (original CAM versions) -->

<entry id="bndtvg" type="char*256" input_pathname="abs" category="ghg_chem"
       group="chem_inparm" valid_values="" >
Full pathname of time-variant boundary dataset for greenhouse gas production/loss
rates.  Only used by the simple prognostic GHG chemistry scheme that is
enabled via the argument "-prog_species GHG" to configure.
Default: set by build-namelist.
</entry>

<entry id="ghg_chem" type="logical"  category="ghg_chem"
       group="chem_inparm" valid_values="" >
This variable should not be set by the user.  It is set by build-namelist
when the user specifies the argument "-prog_species GHG" to configure which
turns on a simple prognostic chemistry scheme for CH4, N2O, CFC11 and
CFC12.
Default: set by build-namelist
</entry>


<!-- CO2 cycle for BGC -->

<entry id="co2_cycle_rad_passive" type="logical" category="co2_cycle"
       group="camexp" valid_values="" >
Flag to set rad_climate variable so that the prognostic CO2 controlled by
the co2_cycle module is radiatively passive.
Default: FALSE
</entry>

<entry id="co2_flag" type="logical"  category="co2_cycle"
       group="co2_cycle_nl" valid_values="" >
If TRUE turn on CO2 code.
Default: FALSE
</entry>

<entry id="co2_readflux_fuel" type="logical"  category="co2_cycle"
       group="co2_cycle_nl" valid_values="" >
If TRUE read co2 flux from fuel.
Default: FALSE
</entry>

<entry id="co2_readflux_ocn" type="logical"  category="co2_cycle"
       group="co2_cycle_nl" valid_values="" >
If TRUE read co2 flux from ocn.
Default: FALSE
</entry>

<entry id="co2flux_ocn_file" type="char*256" input_pathname="abs" category="co2_cycle"
       group="co2_cycle_nl" valid_values="" >
Filepath for dataset containing CO2 flux from ocn.
Default: none
</entry>

<entry id="co2flux_fuel_file" type="char*256" input_pathname="abs" category="co2_cycle"
       group="co2_cycle_nl" valid_values="" >
Filepath for dataset containing CO2 flux from fossil fuel.
Default: none
</entry>

<!-- History and Initial Conditions Output -->

<entry id="avgflag_pertape" type="char*1(6)"  category="history"
       group="cam_inparm" valid_values="A,B,I,X,M" >
Sets the averaging flag for all variables on a particular history file
series. Valid values are:

 A ==&gt; Average
 B ==&gt; GMT 00:00:00 average
 I ==&gt; Instantaneous
 M ==&gt; Minimum
 X ==&gt; Maximum

The default is to use the averaging flags for each variable that are set in
the code via calls to subroutine addfld.

Defaults: set in code via the addfld and add_default subroutine calls.
</entry>

<entry id="empty_htapes" type="logical"  category="history"
       group="cam_inparm" valid_values="" >
If true don't put any of the variables on the history tapes by
default. Only output the variables that the user explicitly lists in
the <varname>fincl#</varname> namelist items.  Default: FALSE
</entry>

<entry id="fexcl1" type="char*24(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to exclude from the 1st history file (by default the name
of this file contains the string "h0").
Default: none
</entry>
<entry id="fexcl2" type="char*24(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to exclude from the 2nd history file (by default the name
of this file contains the string "h1").
Default: none
</entry>
<entry id="fexcl3" type="char*24(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to exclude from the 3rd history file (by default the name
of this file contains the string "h2").
Default: none
</entry>
<entry id="fexcl4" type="char*24(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to exclude from the 4th history file (by default the name
of this file contains the string "h3").
Default: none
</entry>
<entry id="fexcl5" type="char*24(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to exclude from the 5th history file (by default the name
of this file contains the string "h4").
Default: none
</entry>
<entry id="fexcl6" type="char*24(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to exclude from the 6th history file (by default the name
of this file contains the string "h5").
Default: none
</entry>

<entry id="fincl1" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of fields to include on the first history file (by default the name of
this file contains the string "h0").  The added fields must be in Master
Field List.  The averaging flag for the output field can be specified by
appending a ":" and a valid averaging flag to the field name.  Valid flags
are:

 A ==&gt; Average
 B ==&gt; GMT 00:00:00 average
 I ==&gt; Instantaneous
 M ==&gt; Minimum
 X ==&gt; Maximum

Default:  set in code via the addfld and add_default subroutine calls.
</entry>
<entry id="fincl2" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1</varname>, but for the 2nd history file (by default
the name of this file contains the string "h1").
Default: none.
</entry>
<entry id="fincl3" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1</varname>, but for the 3rd history file (by default
the name of this file contains the string "h2").
Default: none.
</entry>
<entry id="fincl4" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1</varname>, but for the 4th history file (by default
the name of this file contains the string "h3").
Default: none.
</entry>
<entry id="fincl5" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1</varname>, but for the 5th history file (by default
the name of this file contains the string "h4").
Default: none.
</entry>
<entry id="fincl6" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1</varname>, but for the 6th history file (by default
the name of this file contains the string "h5").
Default: none.
</entry>

<entry id="clubb_history" type="logical"  category="history"
       group="clubb_his_nl" valid_values="" >
if .true. then output CLUBBs history statistics
</entry>

<entry id="clubb_rad_history" type="logical"  category="history"
       group="clubb_his_nl" valid_values="" >
if .true. then output CLUBBs radiative history statistics
</entry>

<entry id="clubb_vars_zt" type="char*16(10000)"  category="history"
       group="clubb_stats_nl" valid_values="" >
Same as <varname>fincl1</varname>, but for CLUBB statistics on zt grid.
Default: none.
</entry>

<entry id="clubb_vars_zm" type="char*16(10000)"  category="history"
       group="clubb_stats_nl" valid_values="" >
Same as <varname>fincl1</varname>, but for CLUBB statistics on zm grid.
Default: none.
</entry>

<entry id="clubb_vars_rad_zt" type="char*16(10000)"  category="history"
       group="clubb_stats_nl" valid_values="" >
Same as <varname>fincl1</varname>, but for CLUBB statistics on radiation zt grid.
Default: none.
</entry>

<entry id="clubb_vars_rad_zm" type="char*16(10000)"  category="history"
       group="clubb_stats_nl" valid_values="" >
Same as <varname>fincl1</varname>, but for CLUBB statistics on radiation zm grid.
Default: none.
</entry>

<entry id="clubb_vars_sfc" type="char*16(10000)"  category="history"
       group="clubb_stats_nl" valid_values="" >
Same as <varname>fincl1</varname>, but for CLUBB statistics on surface.
Default: none.
</entry>

<entry id="clubb_iop_name" type="char*200"  category="history"
       group="scm_nl" valid_values="" >
Name of the IOP case so case specific adjustments can be made in CLUBB.  
Default: none.
</entry>

<entry id="collect_column_output" type="logical(6)" category="history"
   group="cam_inparm" valid_values="">
Collect all column data into a single field and output in ncol format,
much faster than default when you have a lot of columns.
</entry>

<entry id="fincl1lonlat" type="char*128(750)"  category="history"
       group="cam_inparm" valid_values="" >
List of columns or contiguous columns at which the fincl1 fields will be
output. Individual columns are specified as a string using a longitude
degree (greater or equal to 0.) followed by a single character
(e)ast/(w)est identifer, an underscore '_' , and a latitude degree followed
by a single character (n)orth/(s)outh identifier.  For example, '10e_20n'
would pick the model column closest to 10 degrees east longitude by 20
degrees north latitude.  A group of contiguous columns can be specified
using bounding latitudes and longitudes separated by a colon.  For example,
'10e:20e_15n:20n' would select the model columns which fall with in the
longitude range from 10 east to 20 east and the latitude range from 15
north to 20 north.
Default: none
</entry>
<entry id="fincl2lonlat" type="char*128(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1lonlat</varname>, but for 2nd history file.
</entry>
<entry id="fincl3lonlat" type="char*128(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1lonlat</varname>, but for 3rd history file.
</entry>
<entry id="fincl4lonlat" type="char*128(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1lonlat</varname>, but for 4th history file.
</entry>
<entry id="fincl5lonlat" type="char*128(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1lonlat</varname>, but for 5th history file.
</entry>
<entry id="fincl6lonlat" type="char*128(750)"  category="history"
       group="cam_inparm" valid_values="" >
Same as <varname>fincl1lonlat</varname>, but for 6th history file.
</entry>


<entry id="fwrtpr1" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Specific fields which will be written using the non-default precision on
the 1st history file.
Default: none
</entry>
<entry id="fwrtpr2" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Specific fields which will be written using the non-default precision on
the 2nd history file.
Default: none
</entry>
<entry id="fwrtpr3" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Specific fields which will be written using the non-default precision on
the 3rd history file.
Default: none
</entry>
<entry id="fwrtpr4" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Specific fields which will be written using the non-default precision on
the 4th history file.
Default: none
</entry>
<entry id="fwrtpr5" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Specific fields which will be written using the non-default precision on
the 5th history file.
Default: none
</entry>
<entry id="fwrtpr6" type="char*26(750)"  category="history"
       group="cam_inparm" valid_values="" >
Specific fields which will be written using the non-default precision on
the 6th history file.
Default: none
</entry>

<entry id="hfilename_spec" type="char*256(6)"  category="history"
       group="cam_inparm" valid_values="" >

Array of history filename specifiers.  The filenames of up to six history
output files can be controlled via this variable.  Filename specifiers give
generic formats for the filenames with specific date and time components,
file series number (0-5), and caseid, filled in when the files are
created. The following strings are expanded when the filename is created:
%c=caseid; %t=file series number (0-5); %y=year (normally 4 digits, more
digits if needed); %m=month; %d=day; %s=seconds into current day; %%=%
symbol.  Note that the caseid may be set using the namelist
variable <varname>case_name</varname>.

For example, for a simulation with caseid="test" and current date and time
of 0000-12-31 0:00UT, a filename specifier of "%c.cam2.h%t.%y-%m.nc" would
expand into "test.cam2.h0.0000-12.nc" for the first history file.  The
filename specifier "%c.cam2.h%t.%y-%m-%d-%s.nc" would expand to
"test.cam2.h1.0000-12-31-00000.nc" for the second history file. Spaces are
not allowed in filename specifiers. Although the character "/" is allowed
in the specifier, it will be interpreted as a directory name and the
corresponding directories will have to be created in the model execution
directory (directory given to configure with -cam_exedir option) before
model execution.  The first element is for the primary history file which
is output by default as a monthly history file.  Entries 2 through 6 are
user specified auxilliary output files.

Defaults: "%c.cam2.h0.%y-%m.nc", "%c.cam2.h1.%y-%m-%d-%s.nc", ...,
          "%c.cam2.h5.%y-%m-%d-%s.nc"
</entry>

<entry id="sathist_track_infile" type="char*256" input_pathname="abs" category="history"
       group="satellite_options_nl" valid_values="" >
Full pathname of the satellite track data used by the satellite track history 
output feature.
Default: none 
</entry>
<entry id="sathist_hfilename_spec" type="char*256"  category="history"
       group="satellite_options_nl" valid_values="" >
Satellite track history filename specifier.  See <varname>hfilename_spec</varname>
Default:  "%c.cam2.sat.%y-%m-%d-%s.nc"
</entry>
<entry id="sathist_fincl" type="char*18(750)"  category="history"
       group="satellite_options_nl" valid_values="" >
List of history fields to output along the satellite track specified by  <varname>sathist_track_infile</varname>
Default: none
</entry>
<entry id="sathist_mfilt" type="integer"  category="history"
       group="satellite_options_nl" valid_values="" >
Sets the number of observation columns written the satellite track history file
series. 
Default: 100000
</entry>

<entry id="sathist_nclosest" type="integer"  category="history"
       group="satellite_options_nl" valid_values="" >
Sets the number of columns closest to the observation that should be output. Setting
this to a number greater than 1 allows for spatial interpolation in the post processing.
Default: 1
</entry>

<entry id="sathist_ntimestep" type="integer"  category="history"
       group="satellite_options_nl" valid_values="" >
Sets the number of timesteps closest to the observation that should be output. Setting
this to a number greater than 1 allows for temporal interpolation in the post processing.
Default: 1
</entry>

<entry id="inithist" type="char*8"  category="history"
       group="cam_inparm" valid_values="NONE,6-HOURLY,DAILY,MONTHLY,YEARLY,CAMIOP,ENDOFRUN" >
Frequency that initial files will be output: 6-hourly, daily, monthly,
yearly, or never.  Valid values: 'NONE', '6-HOURLY', 'DAILY', 'MONTHLY',
'YEARLY', 'CAMIOP', 'ENDOFRUN'.
Default: 'YEARLY'
</entry>

<entry id="inithist_all" type="logical"  category="history"
       group="cam_inparm" valid_values="" >
If false then include only REQUIRED fields on IC file.  If true then
include required AND optional fields on IC file.  
Default: FALSE
</entry>

<entry id="mfilt" type="integer(6)"  category="history"
       group="cam_inparm" valid_values="" >
Array containing the maximum number of time samples written to a history
file.  The first value applies to the primary history file, the second
through sixth to the auxillary history files.
Default: 1,30,30,30,30,30
</entry>

<entry id="lcltod_start" type="integer(6)"  category="history"
       group="cam_inparm" valid_values="" >
Array containing the starting time of day for local time history averaging. 
Used in conjuction with lcltod_stop. If lcltod_stop is less than lcltod_start, 
then the time range wraps around 24 hours. The start time is included in the 
interval. Time is in seconds and defaults to 39600 (11:00 AM).  The first value 
applies to the primary hist. file, the second to the first aux. hist. file, etc.
Default: none
</entry>

<entry id="lcltod_stop" type="integer(6)"  category="history"
       group="cam_inparm" valid_values="" >
Array containing the stopping time of day for local time history averaging. 
Used in conjuction with lcltod_start. If lcltod_stop is less than lcltod_start, 
then the time range wraps around 24 hours. The stop time is not included in the 
interval. Time is in seconds and defaults to 0 (midnight).  The first value 
applies to the primary hist. file, the second to the first aux. hist. file, etc.
Default: none
</entry>

<entry id="ndens" type="integer(6)"  category="history"
       group="cam_inparm" valid_values="1,2" > 

Array specifying the precision of real data written to each history file
series. Valid values are 1 or 2. '1' implies output real values are 8-byte
and '2' implies output real values are 4-byte.

Default: 2,2,2,2,2,2
</entry>


<entry id="nhtfrq" type="integer(6)"  category="history"
       group="cam_inparm" valid_values="" > 

Array of write frequencies for each history file series.
If <varname>nhtfrq(1)</varname> = 0, the file will be a monthly average.
Only the first file series may be a monthly average.  If
<varname>nhtfrq(i)</varname> &gt; 0, frequency is specified as number of
timesteps.  If <varname>nhtfrq(i)</varname> &lt; 0, frequency is specified
as number of hours.

Default: 0,-24,-24,-24,-24,-24
</entry>

<!-- Initial Conditions -->

<entry id="ncdata" type="char*256" input_pathname="abs" category="initial_conditions"
       group="cam_inparm" valid_values="" >
Full pathname of initial atmospheric state dataset (NetCDF format).
Default: set by build-namelist.
</entry>

<entry id="pertlim" type="real"  category="initial_conditions"
       group="cam_inparm" valid_values="" >
Perturb the initial conditions for temperature randomly by up to the given
amount. Only applied for initial simulations.
Default: 0.0
</entry>

<entry id="readtrace" type="logical"  category="initial_conditions"
       group="cam_inparm" valid_values="" >
If TRUE, try to initialize data for all consituents by reading from the
initial conditions dataset. If variable not found then data will be
initialized using internally-specified default values.  If FALSE then don't
try reading constituent data from the IC file; just use the
internally-specified defaults.
Default: TRUE
</entry>

<entry id="use_64bit_nc" type="logical"  category="history"
       group="cam_inparm" valid_values="" >
Use 64-bit netCDF format for cam history files.
Default: TRUE
</entry>


<!-- COSP Cloud Simulator control LOGICALS -->

<entry id="docosp" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the COSP cloud simulator is run.
Setting this namelist variable happens automatically if you compile with COSP.
COSP will not run unless this is set to .true. in the namelist!
Turn on the desired simulators using lXXX_sim namelist vars
If no specific simulators are specified, all of the simulators
are run on all columns and all output is saved. (useful for testing). 
COSP is available with CAM4 and CAM5 physics.
This default logical is set in cospsimulator_intr.F90.
Default: FALSE
</entry>

<entry id="cosp_amwg" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, COSP cloud simulators are run to produce 
all output required for the COSP plots in the AMWG diagnostics package.
sets cosp_ncolumns=10 and cosp_nradsteps=3 
(appropriate for COSP statistics derived from seasonal averages),
and runs MISR, ISCCP, MODIS, CloudSat radar and CALIPSO lidar simulators 
(cosp_lmisr_sim=.true.,cosp_lisccp_sim=.true.,
cosp_lmodis_sim=.true.,cosp_lradar_sim=.true.,cosp_llidar_sim=.true.).
This default logical is set in cospsimulator_intr.F90.
Default: TRUE
</entry>

<entry id="cosp_lite" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the COSP cloud simulators are run to produce 
select output for the AMWG diagnostics package.
sets cosp_ncolumns=10 and cosp_nradsteps=3 
(appropriate for COSP statistics derived from seasonal averages),
and runs MISR, ISCCP, MODIS, and CALIPSO lidar simulators 
(cosp_lmisr_sim=.true.,cosp_lisccp_sim=.true.,
cosp_lmodis_sim=.true.,cosp_llidar_sim=.true.).
This default logical is set in cospsimulator_intr.F90.
Default: FALSE
</entry>

<entry id="cosp_passive" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the passive COSP cloud simulators are run to produce 
select output for the AMWG diagnostics package.
sets cosp_ncolumns=10 and cosp_nradsteps=3 
(appropriate for COSP statistics derived from seasonal averages),
and runs MISR, ISCCP, and MODIS simulators 
(cosp_lmisr_sim=.true.,cosp_lisccp_sim=.true.,cosp_lmodis_sim=.true.).
This default logical is set in cospsimulator_intr.F90.
Default: FALSE
</entry>

<entry id="cosp_active" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the active COSP cloud simulators are run to produce 
select output for the AMWG diagnostics package.
sets cosp_ncolumns=10 and cosp_nradsteps=3 
(appropriate for COSP statistics derived from seasonal averages),
and runs CloudSat radar and CALIPSO lidar simulators 
(cosp_lradar_sim=.true.,cosp_llidar_sim=.true.).
This default logical is set in cospsimulator_intr.F90.
Default: FALSE
</entry>

<entry id="cosp_isccp" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the ISCCP cloud simulator is run to produce 
select output for the AMWG diagnostics package.
sets cosp_ncolumns=10 and cosp_nradsteps=3 
(appropriate for COSP statistics derived from seasonal averages),
and runs ISCCP simulator
(cosp_lmisr_sim=.false.,cosp_lisccp_sim=.true.,
cosp_lmodis_sim=.false.,cosp_lradar_sim=.false.,cosp_llidar_sim=.false.).
This default logical is set in cospsimulator_intr.F90.
1236: Default: FALSE
</entry>

<entry id="cosp_runall" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, run all simulators using the default values cosp_ncolumns=50 and
cosp_nradsteps=1.  This option is mainly intended for testing, but it also
must be used in order to output the input fields needed to run the
simulator in an offline mode (via setting cosp_histfile_aux=.true.).
Default: FALSE
</entry>

<entry id="cosp_lradar_sim" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, COSP radar simulator will be run and all non-subcolumn output 
will be saved.
Default: FALSE
</entry>

<entry id="cosp_llidar_sim" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, COSP lidar simulator will be run and all non-subcolumn output
will be saved
Default: FALSE
</entry>

<entry id="cosp_lisccp_sim" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, COSP ISCCP simulator will be run and all non-subcolumn output
will be saved.  ISCCP simulator is run on only daylight
columns.
Default: FALSE
</entry>

<entry id="cosp_lmisr_sim" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, MISR simulator will be run and all non-subcolumn output
will be saved.  MISR simulator is run on only daylight
columns.
Default: FALSE
</entry>

<entry id="cosp_lmodis_sim" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, MODIS simulator will be run and all non-subcolumn output
will be saved.

Default: FALSE
</entry>

<!-- COSP CFMIP Cloud Simulator LOGICALS -->

<entry id="cosp_cfmip_3hr" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the COSP cloud simulator is run for CFMIP 3-hourly 
experiments.
This default logical is set in cospsimulator_intr.F90
Default: FALSE
</entry>

<entry id="cosp_cfmip_da" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the COSP cloud simulator is run for CFMIP daily 
experiments.
This default logical is set in cospsimulator_intr.F90
Default: FALSE
</entry>

<entry id="cosp_cfmip_off" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the COSP cloud simulator is run for CFMIP off-line  
monthly experiments.
This default logical is set in cospsimulator_intr.F90
Default: FALSE
</entry>

<entry id="cosp_cfmip_mon" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, the COSP cloud simulator is run for CFMIP monthly
experiments.
This default logical is set in cospsimulator_intr.F90
Default: FALSE
</entry>

<!-- COSP input control parameters -->

<entry id="cosp_ncolumns" type="integer"  category="cosp"
       group="cospsimulator_nl" valid_values="">
Number of subcolumns in SCOPS
This default logical is set in cospsimulator_intr.F90
Default: 50
</entry>

<!-- COSP sampling parameters -->

<entry id="cosp_sample_atrain" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
Turns on sampling along a-train orbit for radar and lidar simulators.
This default logical is set in cospsimulator_intr.F90
Default: FALSE
</entry>

<entry id="cosp_atrainorbitdata" type="char*256"  category="cosp"
       group="cospsimulator_nl" valid_values="">
Path for the Atrain orbit data file provided by CFMIP.
There is no default for this, but sample_atrain = .true. will not work 
if this namelist variable is undefined.
currently /project/cms/jenkay/SCAM/repository/cloudsat_orbit_08921_14250.nc
Default: no default set now, need to specify in namelist
</entry>

<!-- COSP output parameters -->

<entry id="cosp_histfile_num" type="integer"  category="cosp"
       group="cospsimulator_nl" valid_values="">
This specifies the CAM history tape where COSP diagnostics will be written.
Ignored/not used if any of the cosp_cfmip_* namelist variables are invoked.

This default is set in cospsimulator_intr.F90
Default: 1
</entry>
<entry id="cosp_histfile_aux" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
If true, additional output is added to make it possible to
run COSP off-line.

This default is set in cospsimulator_intr.F90
Default: FALSE
</entry>
<entry id="cosp_histfile_aux_num" type="integer"  category="cosp"
       group="cospsimulator_nl" valid_values="">
This specifies the CAM history tape where extra COSP diagnostics will be written.

This default is set in cospsimulator_intr.F90
Default: 2
</entry>

<entry id="cosp_nradsteps" type="integer"  category="cosp"
       group="cospsimulator_nl" valid_values="">
This specifies the frequency at which is COSP is called, 
every cosp_nradsteps radiation timestep.

This default is set in cospsimulator_intr.F90
Default: 1
</entry>

<entry id="cosp_lfrac_out" type="logical"  category="cosp"
       group="cospsimulator_nl" valid_values="">
Turns on sub-column output from COSP.
If both the isccp/misr simulators and the lidar/radar simulators
are run, lfrac_out is from the isccp/misr simulators columns.
This default logical is set in cospsimulator_intr.F90
Default: FALSE
</entry>

<!-- Cldwat -->
<entry id="cldwat_icritc" type="real" category="conv"
       group="cldwat_nl" valid_values="" >
Threshold for autoconversion of cold ice in RK microphysics scheme.
Default: set by build-namelist
</entry>

<entry id="cldwat_icritw" type="real" category="conv"
       group="cldwat_nl" valid_values="" >
Threshold for autoconversion of warm ice in RK microphysics scheme.
Default: set by build-namelist
</entry>

<entry id="cldwat_conke" type="real" category="conv"
       group="cldwat_nl" valid_values="" >
Tunable constant for evaporation of precip in RK microphysics scheme.
Default: set by build-namelist
</entry>

<entry id="cldwat_r3lcrit" type="real" category="conv"
       group="cldwat_nl" valid_values="" >
Critical radius at which autoconversion become efficient in RK microphysics
scheme.
Default: set by build-namelist
</entry>

<!-- macro_park -->
<entry id="macro_park_do_cldice" type="logical" category="conv"
       group="macro_park_nl" valid_values="" >
Switch to control whether Park macrophysics should prognose
cloud ice (cldice).
Default: .true.
</entry>

<entry id="macro_park_do_cldliq" type="logical" category="conv"
       group="macro_park_nl" valid_values="" >
Switch to control whether Park macrophysics should prognose
cloud liquid (cldliq).
Default: .true.
</entry>

<entry id="macro_park_do_detrain" type="logical" category="conv"
       group="macro_park_nl" valid_values="" >
Switch to control whether Park macrophysics should perform
detrainment into the stratiform cloud scheme.
Default: .true.
</entry>

<!-- micro_mg -->
<entry id="micro_mg_version" type="integer" category="microphys"
       group="micro_mg_nl" valid_values="" >
Version number for MG microphysics
Default: 1
</entry>

<entry id="micro_mg_sub_version" type="integer" category="microphys"
       group="micro_mg_nl" valid_values="" >
Sub-version number for MG microphysics
Default: 0
</entry>

<entry id="micro_mg_do_cldice" type="logical" category="microphys"
       group="micro_mg_nl" valid_values="" >
Switch to control whether MG microphysics should prognose
cloud ice (cldice).
Default: .true.
</entry>

<entry id="micro_mg_do_cldliq" type="logical" category="microphys"
       group="micro_mg_nl" valid_values="" >
Switch to control whether MG microphysics should prognose
cloud liquid (cldliq).
Default: .true.
</entry>

<!-- micro_aero -->
<entry id="microp_aero_bulk_scale" type="real" category="conv"
       group="microp_aero_nl" valid_values="" >
prescribed aerosol bulk sulfur scale factor
Default: 2 
</entry>

<!-- hkconv Moist Convection -->
<entry id="hkconv_cmftau" type="real" category="conv"
       group="hkconv_nl" valid_values="" >
Characteristic adjustment time scale for Hack shallow scheme.
Default: set by build-namelist
</entry>

<entry id="hkconv_c0" type="real" category="conv"
       group="hkconv_nl" valid_values="" >
Rain water autoconversion coefficient for Hack shallow scheme.
Default: set by build-namelist
</entry>

<!-- uwshcu Moist Convection -->
<entry id="uwshcu_rpen" type="real" category="conv"
       group="uwshcu_nl" valid_values="">
Penetrative entrainment efficiency in UW shallow scheme.
Default: set by build-namelist
</entry>

<!-- Cloud fraction -->

<entry id="cldfrc_freeze_dry" type="logical" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
Switch for Vavrus "freeze dry" adjustment in cloud fraction.  Set to FALSE to
turn the adjustment off.
Default: set by build-namelist
</entry>

<entry id="cldfrc_ice" type="logical" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
Switch for ice cloud fraction calculation.
Default: set by build-namelist
</entry>

<entry id="cldfrc_rhminl" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
Minimum rh for low stable clouds.
Default: set by build-namelist
</entry>

<entry id="cldfrc_rhminl_adj_land" type="real" category="conv"
       group="cldfrc_nl" valid_values="" >
Adjustment to rhminl for land without snow cover.
Default: 0.10
</entry>

<entry id="cldfrc_rhminh" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
Minimum rh for high stable clouds.
Default: set by build-namelist
</entry>

<entry id="cldfrc_sh1" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
parameter for shallow convection cloud fraction.
Default: set by build-namelist
</entry>

<entry id="cldfrc_sh2" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
parameter for shallow convection cloud fraction.
Default: set by build-namelist
</entry>

<entry id="cldfrc_dp1" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
parameter for deep convection cloud fraction.
Default: set by build-namelist
</entry>

<entry id="cldfrc_dp2" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
parameter for deep convection cloud fraction.
Default: set by build-namelist
</entry>

<entry id="cldfrc_premit" type="real" category="cldfrc"
       group="cldfrc_nl" valid_values="" >
top pressure bound for mid level cloud.
Default: set by build-namelist
</entry>

<entry id="cldfrc_premib" type="real" category="conv"
       group="cldfrc_nl" valid_values="" >
Bottom height (Pa) for mid-level liquid stratus fraction.
Default: 700.e2
</entry>

<entry id="cldfrc_iceopt" type="integer" category="conv"
       group="cldfrc_nl" valid_values="" >
Scheme for ice cloud fraction: 1=wang & sassen, 2=schiller (iciwc),  
3=wood & field, 4=Wilson (based on smith), 5=modified slingo (ssat & empyt cloud)
Default: 5
</entry>

<entry id="cldfrc_icecrit" type="real" category="conv"
       group="cldfrc_nl" valid_values="" >
Critical RH for ice clouds (Wilson & Ballard scheme).
Default: 0.93
</entry>

<!-- condensate to rain autoconversion coefficient -->
<entry id="zmconv_c0_lnd" type="real" category="conv"
       group="zmconv_nl" valid_values="" >
Autoconversion coefficient over land in ZM deep convection scheme.
Default: set by build-namelist
</entry>

<entry id="zmconv_c0_ocn" type="real" category="conv"
       group="zmconv_nl" valid_values="" >
Autoconversion coefficient over ocean in ZM deep convection scheme.
Default: set by build-namelist
</entry>

<entry id="zmconv_ke" type="real" category="conv"
       group="zmconv_nl" valid_values="" >
Tunable evaporation efficiency in ZM deep convection scheme.
Default: set by build-namelist
</entry>


<!-- Cloud sedimentation -->

<entry id="cldsed_ice_stokes_fac" type="real" category="cldsed"
       group="cldsed_nl" valid_values="" >
Factor applied to the ice fall velocity computed from 
Stokes terminal velocity.
Default: set by build-namelist
</entry>

<!-- Water Vapor Saturation -->

<entry id="wv_sat_scheme" type="char*16" category="wv_sat"
       group="wv_sat_nl" valid_values="GoffGratch,MurphyKoop" >
Type of water vapor saturation vapor pressure scheme employed.  'GoffGratch' for
Goff and Gratch (1946); 'MurphyKoop' for Murphy & Koop (2005)
Default: GoffGratch
</entry>

<!-- Physics sub-column switches -->

<entry id="use_subcol_microp" type="logical" category="conv"
       group="phys_ctl_nl" valid_values="" >
Control use of sub-columns within microphysics;
'false' for no subcolumns.
Default: 'false'
</entry>

<!-- Moist Convection and Microphysics -->

<entry id="deep_scheme" type="char*16" category="conv"
       group="phys_ctl_nl" valid_values="ZM,off" >
Type of deep convection scheme employed.  'ZM' for Zhang-McFarlane;
'off' for none.
Default: 'ZM'
</entry>

<entry id="microp_scheme" type="char*16" category="conv"
       group="phys_ctl_nl" valid_values="RK,MG" >
Type of microphysics scheme employed.  'RK' for Rasch and Kristjansson
(1998); 'MG' for Morrison and Gettelman (2008), Gettelman et al (2010)
two moment scheme for CAM5.1
Default: set by build-namelist (depends on value set in configure).
</entry>

<entry id="macrop_scheme" type="char*16" category="conv"
       group="phys_ctl_nl" valid_values="park,RK,CLUBB_SGS" >
Type of macrophysics scheme employed.  'park' for Park
(1998); 'RK' for Rasch and Kristjansson (1998); 'CLUBB_SGS' clubb.
Default: 'park'
</entry>

<entry id="do_clubb_sgs" type="logical" category="conv"
       group="phys_ctl_nl" valid_values="" >
Switch for CLUBB_SGS
Default: FALSE
</entry>

<entry id="shallow_scheme" type="char*16" category="conv"
       group="phys_ctl_nl" valid_values="Hack,UW,CLUBB_SGS" >
Type of shallow convection scheme employed.  'Hack' for Hack shallow convection;
'UW' for original McCaa UW pbl scheme, modified by Sungsu Park; 'CLUBB_SGS'
for CLUBB_SGS.
Default: set by build-namelist (depends on <varname>eddy_scheme</varname>).
</entry>

<entry id="do_tms" type="logical" category="pbl"
       group="phys_ctl_nl" valid_values="" >
Logical switch to turn on turbulent mountain stress calculation in 
vertical diffusion routine.
Default: set by build-namelist
</entry>

<entry id="eddy_lbulk_max" type="real" category="conv"
       group="vert_diff_nl" valid_values="" >
Maximum master length scale designed to address issues in diag_TKE outside the
boundary layer.
In order not to disturb turbulence characteristics in the lower troposphere,
this should be set at least larger than a few km. However, this does not
significantly improve the values outside of the boundary layer. Smaller values
make some improvement, but it is also noisy. Better results are seen using
eddy_leng_max or kv_freetrop_scale.
Default: 40.e3 (m)
</entry>

<entry id="eddy_leng_max" type="real" category="conv"
       group="vert_diff_nl" valid_values="" >
Maximum dissipation length scale designed to address issues with diag_TKE outside
the boundary layer, where the default value generates large diffusivities. A value
of 30 m is consistent with the length scales used in the HB scheme; however, this
will also reduce value in the boundary layer.
Default: 40.e3 (m)
</entry>

<entry id="eddy_max_bot_pressure" type="real" category="conv"
       group="vert_diff_nl" valid_values="" >
Bottom pressure level at which namelist values for eddy_leng_max and 
eddy_lbulk_max are applied. Default values are used at lower levels (i.e. the 
boundary layer).
Default: 100.e3 (hPa)
</entry>

<entry id="kv_top_pressure" type="real" category="conv"
       group="vert_diff_nl" valid_values="" >
Pressure (Pa) that defined the upper atmosphere for adjustment of
eddy diffusivities from diag_TKE using kv_top_scale.
Default: 0.
</entry>

<entry id="kv_top_scale" type="real" category="conv"
       group="vert_diff_nl" valid_values="" >
Scaling factor that is applied (multiplied) to the eddy diffusivities
in the upper atmosphere (see kv_top_pressure).
Default: 1.0
</entry>

<entry id="kv_freetrop_scale" type="real" category="conv"
       group="vert_diff_nl" valid_values="" >
Scaling factor that is applied (multiplied) to the eddy diffusivities
in the free troposphere (boundary layer to kv_top_pressure)
Default: 1.0
</entry>

<entry id="diff_cnsrv_mass_check" type="logical" category="conv"
       group="vert_diff_nl" valid_values="" >
Perform mass conservation check on eddy diffusion operation.
Default: FALSE
</entry>

<entry id="do_iss" type="logical" category="pbl"
       group="vert_diff_nl" valid_values="" >
Logical switch to turn on implicit turbulent surface stress calculation in
diffusion solver routine.
Default: set by build-namelist
</entry>

<!-- CARMA Sectional Microphysics -->

<entry id="carma_model" type="char*32" category="carma"
       group="carma_nl" valid_values="" >
The name of the active CARMA microphysics model or none when CARMA
is not active.
Default: none
</entry>

<entry id="carma_conmax" type="real" category="carma"
       group="carma_nl" valid_values="" >
A fraction that scales how tight the convergence criteria are to
determine that the substepping has resulted in a valid solution.
Smaller values will force more substepping.
CARMA particles.
Default: 0.1
</entry>

<entry id="carma_dt_threshold" type="real" category="carma"
       group="carma_nl" valid_values="" >
When non-zero, the largest change in temperature (K)
allowed per substep.
Default: 0.
</entry>

<entry id="carma_do_aerosol" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the CARMA model is an aerosol model, and
should be called in tphysac.
Default: TRUE
</entry>

<entry id="carma_do_cldice" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that CARMA is a cloud ice model and should
be called in tphysbc.
Default: FALSE
</entry>

<entry id="carma_do_cldliq" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that CARMA is a cloud liquid model and should
be called in tphysbc.
Default: FALSE
</entry>

<entry id="carma_do_clearsky" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that CARMA should do clear sky calculations for
particles that are not part of a cloud in addition to doing a
separate calculation for incloud particles. Only valid when
carma_do_incloud is true.
Default: FALSE
</entry>

<entry id="carma_do_coag" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating whether the coagulation process is enabled for
CARMA particles.
Default: FALSE
</entry>

<entry id="carma_do_detrain" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that CARMA is responsible for detrain condensate
from convection into the model.
Default: FALSE
</entry>

<entry id="carma_do_drydep" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the dry deposition process is enabled for
CARMA particles.
Default: FALSE
</entry>

<entry id="carma_do_emission" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the emission of particles is enabled for
CARMA.
Default: FALSE
</entry>

<entry id="carma_do_explised" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that sedimentation should be calculated using an
explicit technique where the substepping is used to keep the CFL
condition from being violated rather than the default PPM scheme.
Default: FALSE
</entry>

<entry id="carma_do_fixedinit" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating CARMA coefficients should only be initialized once from
a fixed temperature profile rather than recomputed for each column. This
improves performance, but reduces accuracy. By default the temperature
profile used is calculated as the average of the initial condition file,
but a predefined profile can be provided.
Default: FALSE
</entry>

<entry id="carma_do_grow" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the condensational growth process is enabled for
CARMA particles.
Default: FALSE
</entry>

<entry id="carma_do_hetchem" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that CARMA sulfate surface area density will be used
in heterogeneous chemistry rate calculation.
Default: FALSE
</entry>

<entry id="carma_do_incloud" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that CARMA should treat cloud particles as incloud
rather than gridbox average calculations.
Default: FALSE
</entry>

<entry id="carma_do_optics" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that carma should generate optical properties files
for the CAM radiation code.
Default: FALSE
</entry>

<entry id="carma_do_pheat" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that particle heating will be used for the condensational
growth process.
Default: FALSE
</entry>

<entry id="carma_do_pheatatm" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that particle heating will affect the atmospheric
temperature.
Default: FALSE
</entry>

<entry id="carma_do_substep" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that substepping will be used for the condensational
growth process.
Default: FALSE
</entry>

<entry id="carma_do_thermo" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that changes in heating will be calculated as a result
CARMA processes and will affect the CAM heating tendency.
Default: FALSE
</entry>

<entry id="carma_do_wetdep" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the wet deposition process is enabled for
CARMA particles.
Default: FALSE
</entry>

<entry id="carma_do_vdiff" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the effect of Brownian diffusion will be calculated for
CARMA particles. NOTE: This needs to be used in conjunction with CARMA
sedimentation.
Default: FALSE
</entry>

<entry id="carma_do_vtran" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating that the sedimentation process is enabled for
CARMA particles.
Default: FALSE
</entry>

<entry id="carma_flag" type="logical" category="carma"
       group="carma_nl" valid_values="" >
Flag indicating whether CARMA is enabled. If CARMA has been included
in the build (configure -carma with something other than none), then
this will cause all of the CARMA constituents and field names to be
registered, but no other CARMA process will be preformed. This overrides
the individual CARMA process flags.
Default: FALSE
</entry>

<entry id="carma_maxretries" type="integer" category="carma"
       group="carma_nl" valid_values="" >
Specifies the maximum number of retry attempts to be used when 
condensational growth requires substepping, but the original estimate
for the amount of substepping was insufficient.
Default: 8
</entry>

<entry id="carma_maxsubsteps" type="integer" category="carma"
       group="carma_nl" valid_values="" >
Specifies the maximum number of substeps that could be used for the
first guess when condensational growth requires substepping.
Default: 1
</entry>

<entry id="carma_reftfile" type="char*256" category="carma"
       group="carma_nl" valid_values="" >
Specifies the name of the reference temperature file that will be
used (and created if necessary)  for initialization of CARMA to a
fixed temperature profile.
Default: carma_reft.nc
</entry>

<entry id="carma_cstick" type="real" category="carma"
       group="carma_nl" valid_values="" >
Accommodation coefficient for coagulation.
Default: 1.0
</entry>

<entry id="carma_gsticki" type="real" category="carma"
       group="carma_nl" valid_values="" >
Accommodation coefficient for growth with ice.
Default: 0.93
</entry>

<entry id="carma_gstickl" type="real" category="carma"
       group="carma_nl" valid_values="" >
Accommodation coefficient for growth with liquid.
Default: 1.0
</entry>

<entry id="carma_tstick" type="real" category="carma"
       group="carma_nl" valid_values="" >
Accommodation coefficient for temperature.
Default: 1.0
</entry>

<entry id="carma_rhcrit" type="real" category="carma"
       group="carma_nl" valid_values="" >
Critical relative humidity for liquid cloud formation, used
for sub-grid scale in-cloud saturation.
Default: 1.0
</entry>


<!-- CARMA model - meteor smoke & pmc -->

<entry id="carma_do_escale" type="logical" category="carma_model"
       group="carma_model_nl" valid_values="" >
Flag indicating that meteor smoke emission will be scaled by a
global relative flux based upon the carma_escale_file.
Default: FALSE
</entry>

<entry id="carma_emis_total" type="real" category="carma_model"
       group="carma_model_nl" valid_values="" >
The total meteor smoke emission rate in kt/year. The flux will be
scaled to total that value.
Default: 16.0
</entry>

<entry id="carma_emis_file" type="char*256" input_pathname="abs" category="carma_model"
       group="carma_model_nl" valid_values="" >
Specifies the name of the file containing the meteor smoke emission
(ablation) profile.
Default: set by build-namelist.
</entry>

<entry id="carma_escale_file" type="char*256" input_pathname="abs" category="carma_model"
       group="carma_model_nl" valid_values="" >
Specifies the name of the file containing the global realtive flux
specification.
Default: set by build-namelist.
</entry>

<entry id="carma_launch_doy" type="integer" category="carma_model"
       group="carma_model_nl" valid_values="" >
Specifies the day of year when tracers will start being emitted for the tracer test.
Default: 1
</entry>

<entry id="carma_emission_rate" type="real" category="carma_model"
       group="carma_model_nl" valid_values="" >
The emission rate of inert tracers used in the test. A positive value indicates that
the rate is a column mass (kg/m2/s) and a negative value indicate that it is a mass
mixing ratio (kg/kg/s).
Default: 1e-9
</entry>

<!-- CARMA model - cirrus -->

<entry id="carma_sulfate_method" type="char*32" category="carma_model"
       group="carma_model_nl" valid_values="bulk,carma,fixed,modal" >
Specifies the method to use to get the prescribed sulfate aerosols for use with nucleation
of cirrus clouds. This can be different than the sulfate aerosols that are used with the
climate.
Default: fixed
</entry>

<!-- CARMA model - cirrus & pmc -->

<entry id="carma_mice_file" type="char*256" input_pathname="abs" category="carma_model"
       group="carma_model_nl" valid_values="" >
Specifies the name of the file containing ice refrative indicies as a function of wavelength
used for the particle heating calculation.
Default: set by build-namelist.
</entry>

<!-- CARMA model - dust -->

<entry id="carma_soilerosion_file" type="char*256" input_pathname="abs" category="carma_model"
       group="carma_model_nl" valid_values="" >
Specifies the name of the file containing soil erosion factors. This is used by
the dust model.
Default: set by build-namelist.
</entry>


<!-- CARMA model - sea salt -->

<entry id="carma_do_WeibullK" type="logical" category="carma_model"
       group="carma_model_nl" valid_values="" >
Flag indicating that a calculated Weibull K should be used.
Default: FALSE
</entry>

<entry id="carma_seasalt_emis" type="char*32" category="carma_model"
       group="carma_model_nl" valid_values="" >
Specifies the name of the sea salt emission parameterization.
Default: Gong
</entry>


=======
<!-- Ozone: Data (original CAM version) -->

<entry id="bndtvo" type="char*256" input_pathname="abs" category="o3_data_cam"
       group="cam3_ozone_data_nl" valid_values="" >
Full pathname of time-variant ozone mixing ratio boundary dataset.
Default: set by build-namelist.
</entry>

<entry id="cam3_ozone_data_on" type="logical"  category="o3_data_cam"
       group="cam3_ozone_data_nl" valid_values="" >
Add CAM3 prescribed ozone to the physics buffer.
Default: FALSE
</entry>

<entry id="ozncyc" type="logical"  category="o3_data_cam"
       group="cam3_ozone_data_nl" valid_values="" >
Flag for yearly cycling of ozone data. If set to FALSE, a multi-year
dataset is assumed, otherwise a single-year dataset is assumed, and ozone
will be cycled over the 12 monthly averages in the file.
Default: TRUE
</entry>

<!-- Performance Tuning and Profiling -->

<entry id="papi_ctr1_str" type="char*16"  category="performance"
       group="papi_inparm" valid_values="">
String identifying a hardware counter to the papi library.
Default: PAPI_TOT_CYC
</entry>

<entry id="papi_ctr2_str" type="char*16"  category="performance"
       group="papi_inparm" valid_values="">
String identifying a hardware counter to the papi library.
Default: PAPI_FP_OPS
</entry>

<entry id="papi_ctr3_str" type="char*16"  category="performance"
       group="papi_inparm" valid_values="">
String identifying a hardware counter to the papi library.
Default: PAPI_FP_INS
</entry>

<entry id="papi_ctr4_str" type="char*16"  category="performance"
       group="papi_inparm" valid_values="">
String identifying a hardware counter to the papi library.
Default: PAPI_NO_CTR
</entry>

<entry id="print_step_cost" type="logical"  category="performance"
       group="cam_inparm" valid_values="">
If TRUE, print CPU timing per model timestep. 
Default: FALSE
</entry>

<entry id="profile_barrier" type="logical"  category="performance"
       group="prof_inparm" valid_values="">
Flag indicating whether the mpi_barrier in t_barrierf should be called.
Default: FALSE
</entry>

<entry id="profile_depth_limit" type="integer"  category="performance"
       group="prof_inparm" valid_values="">
Maximum number of levels of timer nesting .
Default: 99999
</entry>

<entry id="profile_detail_limit" type="integer"  category="performance"
       group="prof_inparm" valid_values="">
Maximum detail level to profile.
Default: 1
</entry>

<entry id="profile_disable" type="logical"  category="performance"
       group="prof_inparm" valid_values="">
Flag indicating whether timers are disabled.
Default: FALSE
</entry>

<entry id="profile_global_stats" type="logical"  category="performance"
       group="prof_inparm" valid_values="">
Collect and print out global performance statistics (for this component communicator).
Default: FALSE
</entry>

<entry id="profile_outpe_num" type="integer"  category="performance"
       group="prof_inparm" valid_values="">
Maximum number of processes writing out timing data (for this component communicator).
Default: -1
</entry>

<entry id="profile_outpe_stride" type="integer"  category="performance"
       group="prof_inparm" valid_values="">
Separation between process ids for processes that are writing out timing data 
(for this component communicator).
Default: 1
</entry>

<entry id="profile_papi_enable" type="logical"  category="performance"
       group="prof_inparm" valid_values="">
Flag indicating whether the PAPI namelist should be read and HW performance counters
used in profiling.
Default: FALSE
</entry>

<entry id="profile_single_file" type="logical"  category="performance"
       group="prof_inparm" valid_values="">
Flag indicating whether the performance timer output should be written to a
single file (per component communicator) or to a separate file for each
process.
Default: TRUE
</entry>

<entry id="profile_timer" type="integer"  category="performance"
       group="prof_inparm" valid_values="">
Initialization of GPTL timing library.
Default: GPTLmpiwtime
</entry>

<entry id="swap_comm_protocol" type="integer"  category="performance"
       group="spmd_utils_nl" valid_values="">
Swap communication protocol option (reduced set):
 3, 5:                  nonblocking send
 2, 3, 4, 5:            nonblocking receive
 4, 5:                  ready send
Default: 4
</entry>

<entry id="swap_comm_maxreq" type="integer"  category="performance"
       group="spmd_utils_nl" valid_values="">
Swap communication maximum request count:
 &lt;=0: do not limit number of outstanding send/receive requests
  &gt;0: do not allow more than swap_comm_maxreq outstanding
      nonblocking send requests or nonblocking receive requests
Default: 128
</entry>

<entry id="fc_gather_flow_cntl" type="integer"  category="performance"
       group="spmd_utils_nl" valid_values="">
fc_gather flow control option:
 &lt; 0 : use MPI_Gather
 &gt;= 0: use point-to-point with handshaking messages and preposting 
       receive requests up to 
         max(min(1,fc_gather_flow_cntl),max_gather_block_size) 
       ahead. Default value is defined by private parameter 
       max_gather_block_size, which is currently set to 64.
Default: 64
</entry>

<!-- Physics Buffer -->

<entry id="pbuf_global_allocate" type="logical" category="pbuf"
       group="cam_inparm" valid_values="" >
Allocate all buffers as global.  This is a performance optimization on
machines for which allocation/deallocation of physpkg scope buffers on
every timestep was slow (Cray-X1).
Default: TRUE
</entry>

<!-- Physics control -->

<entry id="cam_physpkg" type="char*16" category="build"
       group="phys_ctl_nl" valid_values="cam3,cam4,cam5,ideal,adiabatic" >
Name of the CAM physics package.  N.B. this variable may not be set by
the user.  It is set by build-namelist via information in the configure
cache file to be consistent with how CAM was built.
Default: set by build-namelist
</entry>

<entry id="cam_chempkg" type="char*16" category="build"
       group="phys_ctl_nl" valid_values="waccm_mozart,waccm_ghg,trop_mozart,
                                         trop_ghg,trop_bam,trop_mam3,trop_mam7,
                                         super_fast_llnl,super_fast_llnl_mam3,none " >
Name of the CAM chemistry package.  N.B. this variable may not be set by
the user.  It is set by build-namelist via information in the configure
cache file to be consistent with how CAM was built.
Default: set by build-namelist
</entry>

<entry id="waccmx_opt" type="char*16" category="waccm"
       group="phys_ctl_nl" valid_values="ionosphere,neutral,off" >
Runtime options of upper thermosphere WACCM-X.  'ionosphere' for 
full ionopshere and neutral thermosphere, 'neutral' for just 
neutral thermosphere, and off for no WACCM-X.
Default: 'off'
</entry>

<!-- Reference Pressures -->

<entry id="trop_cloud_top_press" type="real" category="press_lim"
       group="ref_pres_nl" valid_values="" >
Troposphere cloud physics will be done only below the top defined
by this pressure (Pa).
Default: set by build-namelist
</entry>

<entry id="clim_modal_aero_top_press" type="real" category="press_lim"
       group="ref_pres_nl" valid_values="" >
MAM affects climate only below the top defined by this pressure (Pa).
Default: 0 for non-MAM cases, otherwise set by build-namelist
</entry>

<!-- Physics Debugging -->

<entry id="phys_debug_lat" type="real"  category="phys_debug"
       group="phys_debug_nl" valid_values="">
Use this variable to specify the latitude (in degrees) of a column to
debug.  The closest column in the physics grid will be used.
Default: none
</entry>

<entry id="phys_debug_lon" type="real"  category="phys_debug"
       group="phys_debug_nl" valid_values="">
Use this variable to specify the longitude (in degrees) of a column to
debug.  The closest column in the physics grid will be used.
Default: none
</entry>

<entry id="state_debug_checks" type="logical"  category="phys_debug"
       group="phys_ctl_nl" valid_values="">
If set to .true., turns on extra validation of physics_state objects
in physics_update. Used mainly to track down which package is the
source of invalid data in state.
Default: .false.
</entry>


<!-- Planetary Boundary Layer and Vertical Diffusion -->

<entry id="srf_flux_avg" type="integer" category="pbl"
       group="phys_ctl_nl" valid_values="0,1" >
Switch to turn on adjustment of the surface fluxes to reduce instabilities
in the surface layer.  Set to 1 to turn on the adjustments.
Default: 0 if <varname>eddy_scheme</varname> is 'HB', 1 otherwise.
</entry>

<entry id="eddy_scheme" type="char*16" category="pbl"
       group="phys_ctl_nl" valid_values="HB,diag_TKE,HBR,CLUBB_SGS" >
Type of eddy scheme employed by the vertical diffusion package.  'HB' for
Holtslag and Boville; 'diag_TKE' for diagnostic tke version of Grenier and
Bretherton; 'HBR' for Rasch modified version of 'HB'.
Default: 'HB'
</entry>

<!-- Diagnostics -->

<entry id="history_aerosol" type="logical"  category="diagnostics"
       group="phys_ctl_nl" valid_values="" >
Switch for diagnostic output of the aerosol tendencies
Default: .false.
</entry>

<entry id="history_aero_optics" type="logical"  category="diagnostics"
       group="phys_ctl_nl" valid_values="" >
Switch for diagnostic output of the aerosol optics
Default: .false.
</entry>

<entry id="history_eddy" type="logical"  category="diagnostics"
       group="phys_ctl_nl" valid_values="" >
Switch for diagnostic output of eddy variables 
Default: .false.
</entry>

<entry id="history_budget" type="logical"  category="diagnostics"
       group="phys_ctl_nl" valid_values="" >
Switch for cam4 T/Q budget diagnostic output
Default: .false.
</entry>

<entry id="history_budget_histfile_num" type="integer"  category="diagnostics"
       group="phys_ctl_nl" valid_values="1,2,3,4,5,6" >
History tape number T/Q budget output is written to.
Default: 1
</entry>

<!-- Radiation -->
<entry id="radiation_scheme" type="char*16" category="radiation"
       group="phys_ctl_nl" valid_values="rrtmg,camrt" >
Type of radiation scheme employed. 
Default: set by build-namelist
</entry>

<entry id="conv_water_in_rad" type="integer" category="radiation"
       group="phys_ctl_nl" valid_values="0,1,2" >
Convective water used in radiation?
0 ==> No
1 ==> Yes - Arithmetic average.
2 ==> Yes - Average in emissivity.
Default: set by build-namelist
</entry>

<entry id="absems_data" type="char*256" input_pathname="abs" category="radiation"
       group="cam_inparm" valid_values="" >
Full pathname of absorption/emission dataset.
It consists of terms used for determining the absorptivity and
emissivity of water vapor in the longwave parameterization of radiation.
Default: set by build-namelist.
</entry>

<entry id="iradae" type="integer"  category="radiation"
       group="cam_inparm" valid_values="">
Interval between absorptivity/emissivity calculations in time steps (if
positive) or model hours (if negative).  To avoid having the abs/ems values
saved on the restart output, make sure that the interval of the abs/ems
calculation evenly divides the restart interval.
Default: -12
</entry>

<entry id="iradlw" type="integer"  category="radiation"
       group="cam_inparm" valid_values="">
Interval of long-wave radiation calculation in timesteps (if positive) or
model hours (if negative).
Default: -1
</entry>

<entry id="iradsw" type="integer"  category="radiation"
       group="cam_inparm" valid_values="">
Interval of short-wave radiation calculation in timesteps (if positive) or
model hours (if negative).
Default: -1
</entry>

<entry id="irad_always" type="integer"  category="radiation"
       group="cam_inparm" valid_values="">
Specifies length of time in timesteps (positive) or hours (negative) SW/LW
radiation will be run for every timestep from the start of an initial run.
Default: 0
</entry>

<entry id="spectralflux" type="logical"  category="radiation"
       group="cam_inparm" valid_values="" >
Return fluxes per band in addition to the total fluxes.
Default: FALSE
</entry>

<entry id="mode_defs" type="char*256(60)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Definitions for the aerosol modes that may be used in the rad_climate and
rad_diag_* variables.
Default: set by build-namelist
</entry>

<entry id="rad_climate" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
A list of the radiatively active species, i.e., species that affect the
climate simulation via the radiative heating rate calculation.
Default: set by build-namelist
</entry>

<entry id="rad_diag_1" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
A list of species to be used in the first diagnostic radiative heating rate
calculation.  These species are not the ones affecting the climate
simulation.  This is a hook for performing radiative forcing calculations.
Default: none
</entry>

<entry id="rad_diag_2" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 2nd diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_3" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 3rd diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_4" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 4th diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_5" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 5th diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_6" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 6th diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_7" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 7th diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_8" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 8th diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_9" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 9th diagnostic calculation.
Default: none
</entry>

<entry id="rad_diag_10" type="char*256(30)"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
Analogous to rad_diag_1, but for the 10th diagnostic calculation.
Default: none
</entry>

<entry id="aer_drydep_list" type="char*16(1000)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of aerosol species that undergo dry deposition.
Default: set by build-namelist.
</entry>

<entry id="rad_data_output" type="logical"   category="radiation"
       group="rad_data_nl" valid_values="" >
output data needed for off-line radiation calculations
Default: FALSE
</entry>

<entry id="rad_data_histfile_num" type="integer"   category="radiation"
       group="rad_data_nl" valid_values="" >
History tape number radiation driver output data is written to.
Default: 0
</entry>

<entry id="rad_data_avgflag" type="char*1"   category="radiation"
       group="rad_data_nl" valid_values="" >
Averaging flag for adiation driver output data.
Default: 'A'
</entry>

<!-- Aerosol and cloud optics -->

<entry id="water_refindex_file" type="char*256" input_pathname="abs" category="radiation"
       group="modal_aer_opt_nl" valid_values="" >
Full pathname of dataset for water refractive indices used in modal aerosol optics
Default: none
</entry>


<entry id="drydep_srf_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="">
Dry deposition surface values interpolated to model grid, required for unstructured atmospheric grids
with modal chemistry.
Default: none
</entry>

<entry id="oldcldoptics" type="logical"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
filepath and name for ice optics data for rrtmg
Default: none
</entry>

<entry id="liqcldoptics" type="char*32"  category="radiation"
       group="rad_cnst_nl" valid_values="slingo,gammadist" >
filepath and name for ice optics data for rrtmg
Default: none
</entry>

<entry id="icecldoptics" type="char*32"  category="radiation"
       group="rad_cnst_nl" valid_values="ebertcurry,mitchell" >
filepath and name for ice optics data for rrtmg
Default: none
</entry>

<entry id="iceopticsfile" type="char*256" input_pathname="abs"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
filepath and name for ice optics data for rrtmg
Default: none
</entry>

<entry id="liqopticsfile" type="char*256" input_pathname="abs"  category="radiation"
       group="rad_cnst_nl" valid_values="" >
filepath and name for liquid cloud (gamma distributed) optics data for rrtmg
Default: none
</entry>


<!-- Rayleigh Friction Parameterization -->

<entry id="rayk0" type="integer" category="rayleigh_friction"
       group="cam_inparm" valid_values="">
Variable to specify the vertical index at which the
Rayleigh friction term is centered (the peak value).
Default: 2
</entry>

<entry id="raykrange" type="real" category="rayleigh_friction"
       group="cam_inparm" valid_values="">
Rayleigh friction parameter to determine the width of the profile.  If set
to 0 then a width is chosen by the algorithm (see rayleigh_friction.F90).
Default: 0.
</entry>

<entry id="raytau0" type="real" category="rayleigh_friction"
       group="cam_inparm" valid_values="">
Rayleigh friction parameter to determine the approximate value of the decay
time (days) at model top.  If 0.0 then no Rayleigh friction is applied.
Default: 0.
</entry>


<!-- Restart (Continuation and Branch) Runs -->

<entry id="cam_branch_file" type="char*256" category="restart"
       group="cam_inparm" valid_values="">
Full pathname of master restart file from which to branch. Setting is
Required for branch run.
Default: none
</entry>


<!-- Single column mode -->

<entry id="iopfile" type="char*128" input_pathname="abs" category="scam"
       group="cam_inparm" valid_values="" >
Full pathname of IOP dataset.
Default: set by build-namelist.
</entry>

<entry id="scm_crm_mode" type="logical" category="scam"
       group="cam_inparm" valid_values="">
Column radiation mode.
Default: FALSE
</entry>

<entry id="scm_diurnal_avg" type="logical" category="scam"
       group="cam_inparm" valid_values="">
If using diurnal averaging or not.
Default: FALSE
</entry>

<entry id="scm_iop_srf_prop" type="logical" category="scam"
       group="cam_inparm" valid_values="">
Use the specified surface properties.
Default: FALSE
</entry>

<entry id="scm_clubb_iop_name" type="char*200" category="scam"
       group="cam_inparm" valid_values="">
IOP name for CLUBB running in single column mode
Default: ""
</entry>

<entry id="scm_relaxation" type="logical" category="scam"
       group="cam_inparm" valid_values="">
Use relaxation.
Default: FALSE
</entry>

<!-- Solar Parameters -->

<entry id="solar_const" type="real" category="solar"
       group="solar_inparm" valid_values="">
Total solar irradiance (W/m2).
Default: set by build-namelist
</entry>

<entry id="solar_data_file" type="char*256" input_pathname="abs" category="solar"
       group="solar_inparm" valid_values="" >
Full pathname of dataset for file that contains the solar photon enerspectra or TSI data 
as a time series
Default: none
</entry>

<entry id="solar_data_type" type="char*8" category="solar"
       group="solar_inparm" valid_values="FIXED,SERIAL" >
Type of time interpolation for data in <varname>solar_data_file</varname>.
Can be set to "FIXED" or "SERIAL".
Default: SERIAL
</entry>

<entry id="solar_data_ymd" type="integer"  category="solar"
       group="solar_inparm" valid_values="" >
If <varname>solar_data_type</varname> is "FIXED" then solar_data_ymd
is the date the solar data is fixed to.  If <varname>solar_data_type</varname> 
is "SERIAL" the solar_data_ymd is the start date of the time series
of solar data.
Format: YYYYMMDD
Default: none
</entry>

<entry id="solar_data_tod" type="integer"  category="solar"
       group="solar_inparm" valid_values="" >
Seconds of the day corresponding to <varname>solar_data_ymd</varname>
Default: current model time of day
</entry>

<entry id="solar_htng_spctrl_scl" type="logical"  category="solar"
       group="solar_inparm" valid_values="" >
Use spectral scaling in the radiation heating 
Default: false
</entry>

<!-- Test Tracers -->

<entry id="tracers_flag" type="logical" category="test_tracers"
       group="cam_inparm" valid_values="" >
This variable should not be set by the user.  If configure has been invoked
with the '-nadv_tt N' option then build-namelist will set this flag to true
which turns on the test tracer code.  Also, if the user invokes configure
with the option '-nadv N', and N is larger than the number of advected
constituents requested by all other physics and chemistry
parameterizations, then the number of test tracers is chosen
dynamically to fill the available slots in the constituents array up to the
total number requested by the -nadv option.
Default: set by configure
</entry>

<entry id="aoa_tracers_flag" type="logical" category="test_tracers"
       group="aoa_tracers_nl" valid_values="" >
If true age of air tracers are included.  This variable should not be set
by the user.  It will be set by build-namelist to be consistent with the
'-age_of_air_trcs' argument specified to configure.
Default: set by configure
</entry>

<entry id="aoa_read_from_ic_file" type="logical" category="test_tracers"
       group="aoa_tracers_nl" valid_values="" >
If true age of air tracers are read from the initial conditions file.
If this is not specified then they are not read from IC file.
Default: TRUE
</entry>

<!-- Time step -->

<entry id="dtime" type="real"  category="time_mgr"
       group="cam_inparm" valid_values="">
The length (in seconds) of the coupling interval between the dynamics and
physics.  Changing this variable directly impacts the physical
parameterizations in the model and may impact the climate.  Changing
resolution usually requires a change in <varname>dtime</varname>.  
Default: is resolution and dycore dependent and is set by build-namelist.
</entry>

<!-- Topography -->

<entry id="bnd_topo" type="char*256" input_pathname="abs" category="topo"
       group="cam_inparm" valid_values="" >
Full pathname of time-invariant boundary dataset for topography fields.
Default: set by build-namelist.
</entry>

<!-- Tropopause -->

<entry id="tropopause_climo_file" type="char*256" input_pathname="abs" category="tropo"
       group="tropopause_nl" valid_values="" >
Full pathname of boundary dataset for tropopause climatology.
Default: set by build-namelist.
</entry>

<!-- CAM-CHEM -->

<entry id="ipcc_aircraft_emis" type="logical" category="cam_chem"
       group="camexp" valid_values="" >
Flag to tell build-namelist to use time-dependent external forcing
files for the aircraft emissions.
Default: FALSE
</entry>

<entry id="chem_rad_passive" type="logical" category="cam_chem"
       group="chem_inparm" valid_values="" >
Flag to set rad_climate variable so that the chemical tracers are
radiatively passive.
Default: FALSE
</entry>

<entry id="gas_wetdep_method" type="char*3" category="cam_chem"
       group="wetdep_inparm" valid_values="MOZ,NEU" >
Wet depostion method used
  MOZ --> mozart scheme is used
  NEU --> J Neu's scheme is used
Default: MOZ
</entry>

<entry id="gas_wetdep_list" type="char*16(1000)" category="cam_chem"
       group="wetdep_inparm" valid_values="" >
List of gas-phase species that undergo wet deposition via the wet deposition scheme.
Default: NONE
</entry>

<entry id="aer_wetdep_list" type="char*16(1000)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of aerosol species that undergo wet deposition.
Default: set by build-namelist.
</entry>

<entry id="sol_facti_cloud_borne" type="real" category="cam_chem"
       group="chem_inparm" valid_values="" >
In-cloud scav for cloud-borne aerosol tuning factor
Default: set by build-namelist.
</entry>

<entry id="airpl_emis_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of boundary dataset for airplane emissions.
Default: set by build-namelist.
</entry>

<entry id="clim_soilw_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset containing soil moisture fraction information used in 'xactive_atm' 
method of calculating dry deposition of chemical tracers.
Default: set by build-namelist.
</entry>

<entry id="depvel_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset which contains the prescribed deposition velocities used 
in the 'table' method of calculating dry deposition  of chemical tracers.
Default: set by build-namelist.
</entry>

<entry id="depvel_lnd_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset which contains land vegitation information used in 'xactive_atm' 
method of calculating dry deposition of chemical tracers.
Default: set by build-namelist.
</entry>

<entry id="season_wes_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset which contains season information used in 'xactive_atm' 
method of calculating dry deposition of chemical tracers.
Default: set by build-namelist.
</entry>

<entry id="dust_emis_fact" type="real" category="cam_chem"
       group="aerosol_nl" valid_values="" >
Tuning parameter for dust emissions.
Default: set by build-namelist.
</entry>

<entry id="efield_hflux_file" type="char*256" input_pathname="abs" category="waccm_phys"
       group="cam_inparm" valid_values="" >
Full pathname of dataset for coefficient data used in WACCM to calculate ion drag 
for high solar fluxes from the Scherliess low latitude electric potential model.
Default: set by build-namelist.
</entry>

<entry id="efield_lflux_file" type="char*256" input_pathname="abs" category="waccm_phys"
       group="cam_inparm" valid_values="" >
Full pathname of dataset for coefficient data used in WACCM to calculate ion drag 
for low solar fluxes from the Scherliess low latitude electric potential model.
Default: set by build-namelist.
</entry>

<entry id="efield_wei96_file" type="char*256" input_pathname="abs" category="waccm_phys"
       group="cam_inparm" valid_values="" >
Full pathname of dataset for coefficient data used in WACCM to calculate ion drag 
from the Weimer96 high latitude electric potential model.
Default: set by build-namelist.
</entry>

<entry id="electron_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for the neutral species absorption cross sections for EUV 
photo reactions producing electrons.
Default: set by build-namelist.
</entry>

<entry id="srf_emis_type" type="char*32" category="cam_chem"
       group="chem_inparm" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation of emission datasets specified.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
by <varname>srf_emis_specifier</varname>. 
Default: 'CYCLICAL'
</entry>

<entry id="srf_emis_cycle_yr" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The  cycle year of the surface emissions data
if <varname>srf_emis_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="srf_emis_fixed_ymd" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The date at which the surface emissions are fixed
if <varname>srf_emis_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="srf_emis_fixed_tod" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>srf_emis_fixed_ymd</varname>
at which the surface emissions are fixed
if <varname>srf_emis_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="euvac_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for EUVAC solar EUV model (0.05-121nm).
Default: set by build-namelist.
</entry>

<entry id="euvacdat_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for variables used to compute the solar flux in the EUV 
wavelength regime.  Used to compute EUV photorates and heating from EUV photolysis.
Default: set by build-namelist.
</entry>

<entry id="ext_frc_cycle_yr" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The  cycle year of the external forcings (3D emissions) data
if <varname>ext_frc_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="ext_frc_fixed_ymd" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
Default: current model date
The date at which the external forcings are fixed
if <varname>ext_frc_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="ext_frc_fixed_tod" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>ext_frc_fixed_ymd</varname>
at which the external forcings are fixed
if <varname>ext_frc_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="ext_frc_specifier" type="char*256(1000)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of full pathnames of elevated emission (or external chemical forcings) datasets.

The chemistry package reads in elevated emission data from a set of netcdf files in
units of "molecules/cm3/s".  Each tracer species emissions is read from its
own file as directed by the namelist variable <varname>ext_frc_specifier</varname>.  The
<varname>ext_frc_specifier</varname> variable tells the model which species have elevated
emissions and the file path for the corresponding species.  That is, the
<varname>ext_frc_specifier</varname> variable is set something like:

 ext_frc_specifier = 'SO2 -> /path/vrt.emis.so2.nc',
                     'SO4 -> /path/vrt.emis.so4.nc', etc...

Each emission file can have more than one source.  When the emission are
read in the sources are summed to give a total emission field for the
corresponding species.  The emission can be read in as time series of data,
cycle over a given year, or be fixed to a given date.

The vertical coordinate in these emissions files should be 'altitude' (km) so that the 
vertical redistribution to the model layers is done using a mass conserving method.  
If the vertical coordinate is altitude then data needs to be ordered from the
surface to the top (increasing altitude).

Default: set by build-namelist.
</entry>

<entry id="ext_frc_type" type="char*32" category="cam_chem"
       group="chem_inparm" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for fixed lower boundary data.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'CYCLICAL'
</entry>

<entry id="flbc_cycle_yr" type="integer" category="cam_chem"
       group="chem_surfvals_nl" valid_values="" >
The cycle year of the fixed lower boundary data
if <varname>flbc_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>
<entry id="flbc_fixed_ymd" type="integer" category="cam_chem"
       group="chem_surfvals_nl" valid_values="" >
The date at which the fixed lower boundary data is fixed
if <varname>flbc_type</varname> is 'FIXED'..
Format: YYYYMMDD
Default: 0
</entry>
<entry id="flbc_fixed_tod" type="integer" category="cam_chem"
       group="chem_surfvals_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>flbc_fixed_ymd</varname>
at which the fixed lower boundary data is fixed
if <varname>flbc_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="flbc_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_surfvals_nl" valid_values="" >
Full pathname of dataset for fixed lower boundary conditions.
Default: set by build-namelist.
</entry>

<entry id="flbc_list" type="char*16(1000)" category="cam_chem"
       group="chem_surfvals_nl" valid_values="" >
List of species that are fixed at the lower boundary.
Default: set by build-namelist.
</entry>

<entry id="flbc_type" type="char*8" category="cam_chem"
       group="chem_surfvals_nl" valid_values="CYCLICAL,SERIAL,FIXED" >
Type of time interpolation for fixed lower boundary data.
Default: 'CYCLICAL'
</entry>

<entry id="fstrat_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for chemical tracers constrained  in the stratosphere
Default: set by build-namelist.
</entry>

<entry id="fstrat_list" type="char*16(1000)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of species that are constrained in the stratosphere.
Default: set by build-namelist.
</entry>

<entry id="lght_landmask_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for land mask applied to the lighting NOx production  
Default: set by build-namelist.
</entry>

<entry id="lght_no_prd_factor" type="real" category="cam_chem"
       group="chem_inparm" valid_values="" >
Multiplication factor  applied to the lighting NOx production  
Default: 1.0.
</entry>

<entry id="no_xfac_ubc" type="real" category="waccm"
       group="chem_inparm" valid_values="" >
Multiplication factor applied to the upper boundary NO mass mixing ratio. 
Default: 1.0
</entry>

<entry id="photon_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for the neutral species absorption cross sections.
Default: set by build-namelist.
</entry>

<entry id="tuv_xsect_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for fast-tuv photolysis cross sections
Default: set by build-namelist.
</entry>

<entry id="o2_xsect_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset of O2 cross sections for fast-tuv photolysis 
Default: set by build-namelist.
</entry>

<entry id="exo_coldens_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset of O2 and 03 column densities above the model for look-up-table photolysis 
Default: set by build-namelist.
</entry>

<entry id="aircraft_specifier" type="char*256(100)" category="cam_chem"
       group="aircraft_emit_nl" valid_values="" >
Full pathname of the aircraft input file list
Default: none
</entry>

<entry id="aircraft_type" type="char*32" category="cam_chem"
       group="aircraft_emit_nl" valid_values="CYCLICAL_LIST" >
Type of time interpolation for data in aircraft aerosol files.
Default: 'CYCLICAL_LIST'
</entry>

<entry id="prescribed_aero_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>prescribed_aero_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_aero_model" type="char*5" category="cam_chem"
       group="camexp" valid_values="bulk,modal" >
Switch used to indicate which type of aerosols are prescribed -- bulk or modal.
This is used to set the default <varname>prescribed_aero_specifier</varname> and 
<varname>aerodep_flx_specifier</varname> namelist variables.
Default: bulk
</entry>

<entry id="prescribed_aero_file" type="char*256" input_pathname="rel:prescribed_aero_datapath" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
Filename of dataset for prescribed aerosols.
Default: set by build-namelist.
</entry>

<entry id="prescribed_aero_filelist" type="char*256" input_pathname="rel:prescribed_aero_datapath" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
Filename of file that contains a sequence of filenames for prescribed
aerosols.  The filenames in this file are relative to the directory specied
by <varname>prescribed_aero_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_aero_rmfile" type="logical" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
Remove the file containing prescribed aerosol concentrations from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="prescribed_aero_specifier" type="char*32(50)" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
A list of variable names of the concentration fields in the prescribed aerosol datasets
and corresponding names used in the physics buffer seperated by colons.  For example:

 prescribed_aero_specifier = 'pbuf_name1:ncdf_fld_name1','pbuf_name2:ncdf_fld_name2', ...

If there is no colon seperater then the specified name is used as both the pbuf_name and ncdf_fld_name,

Default: none
</entry>

<entry id="prescribed_aero_type" type="char*32" category="cam_chem"
       group="prescribed_aero_nl" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in prescribed_aero files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="prescribed_aero_cycle_yr" type="integer" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
The  cycle year of the prescribed aerosol data
if <varname>prescribed_aero_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="prescribed_aero_fixed_ymd" type="integer" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
The date at which the prescribed aerosol data is fixed
if <varname>prescribed_aero_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="prescribed_aero_fixed_tod" type="integer" category="cam_chem"
       group="prescribed_aero_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>prescribed_aero_fixed_ymd</varname>
at which the prescribed aerosol data is fixed
if <varname>prescribed_aero_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="aerodep_flx_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>aerodep_flx_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="aerodep_flx_file" type="char*256" input_pathname="rel:aerodep_flx_datapath" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
Filename of dataset for prescribed aerosols.
Default: set by build-namelist.
</entry>

<entry id="aerodep_flx_filelist" type="char*256" input_pathname="rel:aerodep_flx_datapath" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
Filename of file that contains a sequence of filenames for prescribed
aerosols.  The filenames in this file are relative to the directory specied
by <varname>aerodep_flx_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="aerodep_flx_rmfile" type="logical" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
Remove the file containing prescribed aerosol deposition fluxes from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="aerodep_flx_specifier" type="char*32(22)" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
Names of variables containing aerosol data in the prescribed aerosol datasets.
Default: none
</entry>

<entry id="aerodep_flx_type" type="char*32" category="cam_chem"
       group="aerodep_flx_nl" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in aerodep_flx files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="aerodep_flx_cycle_yr" type="integer" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
The  cycle year of the prescribed aerosol flux data
if <varname>aerodep_flx_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="aerodep_flx_fixed_ymd" type="integer" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
The date at which the prescribed aerosol flux data is fixed
if <varname>aerodep_flx_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="aerodep_flx_fixed_tod" type="integer" category="cam_chem"
       group="aerodep_flx_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>ssaerodep_flx_fixed_ymd</varname>
at which the prescribed aerosol flux data is fixed
if <varname>saerodep_flx_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="prescribed_ghg_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>prescribed_ghg_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_ghg_file" type="char*256" input_pathname="rel:prescribed_ghg_datapath" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
Filename of dataset for prescribed GHGs.
Default: set by build-namelist.
</entry>

<entry id="prescribed_ghg_filelist" type="char*256" input_pathname="rel:prescribed_ghg_datapath" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
Filename of file that contains a sequence of filenames for prescribed
GHGs.  The filenames in this file are relative to the directory specied
by <varname>prescribed_ghg_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_ghg_rmfile" type="logical" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
Remove the file containing prescribed green house gas concentrations from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="prescribed_ghg_specifier" type="char*16(100)" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
Names of variables containing GHG data in the prescribed GHG datasets.
Default: none
</entry>

<entry id="prescribed_ghg_type" type="char*32" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in prescribed_ghg files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="prescribed_ghg_cycle_yr" type="integer" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
The  cycle year of the prescribed green house gas data
if <varname>prescribed_ghg_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="prescribed_ghg_fixed_ymd" type="integer" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
The date at which the prescribed green house gas data  is fixed
if <varname>prescribed_ghg_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="prescribed_ghg_fixed_tod" type="integer" category="cam_chem"
       group="prescribed_ghg_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>prescribed_ghg_fixed_ymd</varname>
at which the prescribed green house gas data is fixed
if <varname>prescribed_ghg_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="prescribed_ozone_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>prescribed_ozone_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_ozone_file" type="char*256" input_pathname="rel:prescribed_ozone_datapath" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
Filename of dataset for prescribed ozone.
Default: set by build-namelist.
</entry>

<entry id="prescribed_ozone_filelist" type="char*256" input_pathname="rel:prescribed_ozone_datapath" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
Filename of file that contains a sequence of filenames for prescribed
ozone.  The filenames in this file are relative to the directory specied
by <varname>prescribed_ozone_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_ozone_name" type="char*16" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
Name of variable containing ozone data in the prescribed ozone datasets.
Default: 'ozone'
</entry>

<entry id="prescribed_ozone_rmfile" type="logical" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
Remove the file containing prescribed ozone concentrations from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="prescribed_ozone_type" type="char*32" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in prescribed_ozone files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="prescribed_ozone_cycle_yr" type="integer" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
The  cycle year of the prescribed ozone data
if <varname>prescribed_ozone_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="prescribed_ozone_fixed_ymd" type="integer" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
The date at which the prescribed ozone data is fixed
if <varname>prescribed_ozone_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="prescribed_ozone_fixed_tod" type="integer" category="cam_chem"
       group="prescribed_ozone_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>prescribed_ozone_fixed_ymd</varname>
at which the prescribed ozone data is fixed
if <varname>prescribed_ozone_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="prescribed_volcaero_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>prescribed_volcaero_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_volcaero_file" type="char*256" input_pathname="rel:prescribed_volcaero_datapath" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
Filename of dataset for prescribed volcaero.
Default: set by build-namelist.
</entry>

<entry id="prescribed_volcaero_filelist" type="char*256" input_pathname="rel:prescribed_volcaero_datapath" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
Filename of file that contains a sequence of filenames for prescribed
volcaero.  The filenames in this file are relative to the directory specied
by <varname>prescribed_volcaero_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="prescribed_volcaero_name" type="char*16" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
Name of variable containing volcaero data in the prescribed volcaero datasets.
Default: 'MMRVOLC'
</entry>

<entry id="prescribed_volcaero_rmfile" type="logical" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
Remove the file containing prescribed volcanic aerosol concentrations from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="prescribed_volcaero_type" type="char*32" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in prescribed_volcaero files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="prescribed_volcaero_cycle_yr" type="integer" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
The  cycle year of the prescribed volcanic aerosol data
if <varname>prescribed_volcaero_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="prescribed_volcaero_fixed_ymd" type="integer" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
The date at which the prescribed volcanic aerosol data  is fixed
if <varname>prescribed_volcaero_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="prescribed_volcaero_fixed_tod" type="integer" category="cam_chem"
       group="prescribed_volcaero_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>prescribed_volcaero_fixed_ymd</varname>
at which the prescribed volcanic aerosol data is fixed
if <varname>prescribed_volcaero_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="rsf_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for radiative source function used in look up table photloysis
Default: set by build-namelist.
</entry>

<entry id="sad_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for stratospheric aerosol densities
Default: set by build-namelist.
</entry>

<entry id="sad_cycle_yr" type="integer" category="waccm"
       group="chem_inparm" valid_values="" >
The cycle year of the stratospheric aerosol data
if <varname>sad_cycle_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>
<entry id="sad_fixed_ymd" type="integer" category="waccm"
       group="chem_inparm" valid_values="" >
The date at which the stratospheric aerosol data is fixed
if <varname>sad_type</varname> is 'FIXED'..
Format: YYYYMMDD
Default: 0
</entry>
<entry id="sad_fixed_tod" type="integer" category="waccm"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>sad_fixed_ymd</varname>
at which the stratospheric aerosol data is fixed
if <varname>sad_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="sad_type" type="char*16" category="waccm"
       group="chem_inparm" valid_values="FIXED,SERIAL,CYCLICAL" >
Type of time interpolation for stratospheric aerosol density data.
Can be set to 'CYCLICAL', 'SERIAL', or 'FIXED'.
Default: 'CYCLICAL'
</entry>

<entry id="snoe_ubc_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for the coefficients of the NOEM nitric oxide model used 
to calculate its upper boundary concentration.
Default: set by build-namelist.
</entry>

<entry id="soil_erod" type="char*256" input_pathname="abs" category="cam_chem"
       group="aerosol_nl" valid_values="" >
Full pathname of boundary dataset for soil erodibility factors.
Default: set by build-namelist.
</entry>

<entry id="solar_parms_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of time-variant boundary dataset for the time-dependent proxies for 
solar and geomagnetic activity( F10.7, F10.7a, Kp, Ap ).
Default: set by build-namelist.
</entry>

<entry id="gw_drag_file" type="char*256" input_pathname="abs" category="waccm_phys"
       group="gw_drag_nl" valid_values="" >
Full pathname of Bers lookup table data file for gravity waves.
Default: set by build-namelist.
</entry>

<entry id="srf_emis_specifier" type="char*256(1000)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of full pathnames of surface emission datasets.

The chemistry package reads in emission data from a set of netcdf files in
units of "molecules/cm2/s".  Each tracer species emissions is read from its
own file as directed by the namelist variable <varname>srf_emis_specifier</varname>.  The
<varname>srf_emis_specifier</varname> variable tells the model which species have emissions
and the file path for the corresponding species.  That is, the
<varname>srf_emis_specifier</varname> variable is set something like:

 srf_emis_specifier = 'CH4 -> /path/emis.ch4.nc',
                      'CO  -> /path/emis.co.nc', etc...

Each emission file can have more than one source.  When the emission are
read in the sources are summed to give a total emission field for the
corresponding species.  The emission can be read in as time series of data,
cycle over a given year, or be fixed to a given date.

Default: set by build-namelist.
</entry>

<entry id="sulf_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset containing tropopheric sulfate aerosols
Default: set by build-namelist.
</entry>

<entry id="tgcm_ubc_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for TGCM upper boundary
Default: set by build-namelist.
</entry>
<entry id="tgcm_ubc_data_type" type="char*32" category="waccm"
       group="chem_inparm" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in TGCM upper boundary file.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="tgcm_ubc_cycle_yr" type="integer" category="waccm"
       group="chem_inparm" valid_values="" >
The cycle year of the TGCM upper boundary data
if <varname>tgcm_ubc_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="tgcm_ubc_fixed_ymd" type="integer" category="waccm"
       group="chem_inparm" valid_values="" >
The date at which the TGCM upper boundary data is fixed
if <varname>tgcm_ubc_type</varname> is 'FIXED'.
Format: YYYY
Default: 0
</entry>

<entry id="tgcm_ubc_fixed_tod" type="integer" category="waccm"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>tgcm_ubc_fixed_ymd</varname>
at which the TGCM upper boundary data is fixed
if <varname>tgcm_ubc_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="t_pert_ubc" type="real" category="waccm"
       group="chem_inparm" valid_values="" >
Perturbation applied to the upper boundary temperature.
Default: 0.0
</entry>

<entry id="chem_freq" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
Frequency in time steps at which the chemical equations are solved.
Default: 1
</entry>

<entry id="chlorine_loading_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of dataset for linoz cholirine loading.
Default: none.
</entry>
<entry id="chlorine_loading_type" type="char*8" category="cam_chem"
       group="chem_inparm" valid_values="SERIAL,FIXED" >
Type of time interpolation type for data in  <varname>chlorine_loading_file</varname>
Default: 'SERIAL'
</entry>
<entry id="chlorine_loading_fixed_tod" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>chlorine_loading_fixed_ymd</varname>
at which the chlorine loading data is fixed
if <varname>chlorine_loading_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>
<entry id="chlorine_loading_fixed_ymd" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The date at which the chlorine loading data is fixed
if <varname>chlorine_loading_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>


<entry id="linoz_data_path" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>linoz_data_filelist</varname>.
Default: none.
</entry>

<entry id="linoz_data_file" type="char*256" input_pathname="rel:linoz_data_path" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of dataset for LINOZ data.
Default: none.
</entry>

<entry id="linoz_data_filelist" type="char*256" input_pathname="rel:linoz_data_datapath" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of file that contains a sequence of filenames of the linoz data.  
The filenames in this file are relative to the directory specied
by <varname>linoz_data_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="linoz_data_type" type="char*24" category="cam_chem"
       group="chem_inparm" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in linoz_data files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'SERIAL'
</entry>

<entry id="linoz_data_rmfile" type="logical" category="cam_chem"
       group="chem_inparm" valid_values="TRUE,FALSE" >
Remove the file containing LINOZ data from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="linoz_data_cycle_yr" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The  cycle year of the LINOZ data
if <varname>linoz_data_type</varname> is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="linoz_data_fixed_ymd" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The date at which the LINOZ data  is fixed
if <varname>linoz_data_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="linoz_data_fixed_tod" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>linoz_data_fixed_ymd</varname>
at which the LINOZ data is fixed
if <varname>linoz_data_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="tracer_cnst_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>tracer_cnst_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="tracer_cnst_file" type="char*256" input_pathname="rel:tracer_cnst_datapath" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of dataset for the prescribed chemical constituents.
Default: set by build-namelist.
</entry>

<entry id="tracer_cnst_filelist" type="char*256" input_pathname="rel:tracer_cnst_datapath" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of file that contains a sequence of filenames for the prescribed chemical constituents.  
The filenames in this file are relative to the directory specied
by <varname>tracer_cnst_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="tracer_cnst_rmfile" type="logical" category="cam_chem"
       group="chem_inparm" valid_values="" >
Remove the file containing prescribed chemical constituents from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="tracer_cnst_specifier" type="char*256(100)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of prescribed chemical constituents.
Default: set by build-namelist.
</entry>

<entry id="tracer_cnst_type" type="char*24" category="cam_chem"
       group="chem_inparm" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in tracer_cnst files.
Default: 'SERIAL'
</entry>

<entry id="tracer_cnst_cycle_yr" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The  cycle year of the prescribed chemical constituents data
if <varname>tracer_cnst_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="tracer_cnst_fixed_ymd" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The date at which the chemical constituents data is fixed
if <varname>tracer_cnst_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="tracer_cnst_fixed_tod" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>tracer_cnst_fixed_ymd</varname>
at which the chemical constituents data is fixed
if <varname>tracer_cnst_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="tracer_srcs_datapath" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>tracer_srcs_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="tracer_srcs_file" type="char*256" input_pathname="rel:tracer_srcs_datapath" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of dataset for the prescribed chemical sources.
Default: set by build-namelist.
</entry>

<entry id="tracer_srcs_filelist" type="char*256" input_pathname="rel:tracer_srcs_datapath" category="cam_chem"
       group="chem_inparm" valid_values="" >
Filename of file that contains a sequence of datasets for the prescribed chemical sources.
The filenames in this file are relative to the directory specied
by <varname>tracer_srcs_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="tracer_srcs_rmfile" type="logical" category="cam_chem"
       group="chem_inparm" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Remove the file containing prescribed chemical sources from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="tracer_srcs_specifier" type="char*256(100)" category="cam_chem"
       group="chem_inparm" valid_values="" >
List of prescribed chemical sources
Default: set by build-namelist.
</entry>

<entry id="tracer_srcs_type" type="char*24" category="cam_chem"
       group="chem_inparm" valid_values="" >
Type of time interpolation for data in tracer_srcs files.
Default: 'SERIAL'
</entry>

<entry id="tracer_srcs_cycle_yr" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The  cycle year of the prescribed chemical sources data
if <varname>tracer_srcs_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="tracer_srcs_fixed_ymd" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The date at which the chemical sources data is fixed
if <varname>tracer_srcs_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="tracer_srcs_fixed_tod" type="integer" category="cam_chem"
       group="chem_inparm" valid_values="" >
The time of day (seconds) corresponding to <varname>tracer_srcs_fixed_ymd</varname>
at which the chemical sources data is fixed
if <varname>tracer_srcs_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="use_cam_sulfchem" type="logical"  category="cam_chem"
       group="chem_inparm" valid_values="" >
If TRUE use CAM sulfur chemistry driver rather than mo_setsox.
Default: FALSE
</entry>

<entry id="xactive_prates" type="logical" category="cam_chem"
       group="chem_inparm" valid_values="" >
If TRUE then use the FTUV method to calculate the photolysis reactions rates,
otherwise use the look up table method.
Default: FALSE
</entry>

<entry id="xs_coef_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of dataset for  Chebyshev polynomial Coeff data used for photolysis
cross sections.
Default: set by build-namelist.
</entry>

<entry id="xs_long_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of cross section dataset for long wavelengh photolysis
Default: set by build-namelist.
</entry>

<entry id="xs_short_file" type="char*256" input_pathname="abs" category="cam_chem"
       group="chem_inparm" valid_values="" >
Full pathname of cross section dataset for short wavelengh photolysis
Default: set by build-namelist.
</entry>

<!-- Namelist read by seq_drydep_mod and shared by CAM and CLM -->

<entry id="drydep_list" type="char*16(1000)" category="dry_deposition"
       group="drydep_inparm" valid_values="" >
List of species that undergo dry deposition.
Default: set by build-namelist.
</entry>

<entry id="drydep_method" type="char*16" category="dry_deposition"
       group="drydep_inparm" valid_values="xactive_atm,xactive_lnd,table" >
Dry deposition method used.  This specifies the method used to calculate dry
deposition velocities of gas-phase chemical species.  The available methods 
are:
 'table'       - prescribed method in CAM
 'xactive_atm' - interactive method in CAM
 'xactive_lnd' - interactive method in CLM
Default: set by build-namelist
</entry>

<entry id="megan_factors_file" type="char*256" input_pathname="abs" category="VOC_emissions"
       group="megan_emis_nl" valid_values="" >
File containing MEGAN emissions factors.
Default: set by build-namelist.
</entry>

<entry id="megan_specifier" type="char*1024(100)" category="VOC_emissions"
       group="megan_emis_nl" valid_values="" >
MEGAN specifier.
Default: set by build-namelist.
</entry>

<entry id="megan_mapped_emisfctrs" type="logical" category="VOC_emissions"
       group="megan_emis_nl" valid_values=".true.,.false." >
MEGAN mapped isoprene emissions facters switch
If true then use mapped MEGAN emissions facters for isoprene.
Default: .false.
</entry>

<entry id="carma_fields" type="char*256" category="carma"
       group="carma_inparm" valid_values="" >
List of fluxes needed by the CARMA model, from CLM to CAM.
Default: set by build-namelist.
</entry>

<!-- WACCM_GHG Chemistry -->

<entry id="waccm_forcing_file" type="char*256" input_pathname="rel:waccm_forcing_datapath" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
Filename of the prescribed waccm forcing data used with waccm_ghg chemistry.
This contains prescribed constituents for non-LTE calculations and heating rates 
for wavelengths less than 200 nm.
Default: set by build-namelist.
</entry>

<entry id="waccm_forcing_datapath" type="char*256" input_pathname="abs" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
Full pathname of the directory that contains the files specified in
<varname>waccm_forcing_filelist</varname>.
Default: set by build-namelist.
</entry>

<entry id="waccm_forcing_filelist" type="char*256" input_pathname="rel:waccm_forcing_datapath" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
A file that contains a sequence of filenames for prescribed waccm forcing data.  
The filenames in this file are relative to the directory specied 
by <varname>waccm_forcing_datapath</varname>.
Default: set by build-namelist.
</entry>

<entry id="waccm_forcing_rmfile" type="logical" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
Remove the file containing prescribed waccm forcing data from local disk when no longer needed.
Default: FALSE
</entry>

<entry id="waccm_forcing_specifier" type="char*16(100)" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
Names of variables containing concentrations and heating rate in the prescribed waccm forcing datasets.
Default: none
</entry>

<entry id="waccm_forcing_type" type="char*32" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="CYCLICAL,SERIAL,INTERP_MISSING_MONTHS,FIXED" >
Type of time interpolation for data in waccm_forcing files.
Can be set to 'CYCLICAL', 'SERIAL', 'INTERP_MISSING_MONTHS', or 'FIXED'.
Default: 'CYCLICAL'
</entry>

<entry id="waccm_forcing_cycle_yr" type="integer" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
The  cycle year of the prescribed waccm forcing data
if <varname>waccm_forcing_type</varname>  is 'CYCLICAL'.
Format: YYYY
Default: 0
</entry>

<entry id="waccm_forcing_fixed_ymd" type="integer" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
The date at which the prescribed waccm forcing data is fixed
if <varname>waccm_forcing_type</varname> is 'FIXED'.
Format: YYYYMMDD
Default: 0
</entry>

<entry id="waccm_forcing_fixed_tod" type="integer" category="waccm_ghg"
       group="waccm_forcing_nl" valid_values="" >
The time of day (seconds) corresponding to <varname>waccm_forcing_fixed_ymd</varname>
at which the prescribed waccm forcing data is fixed
if <varname>waccm_forcing_type</varname> is 'FIXED'.
Default: 0 seconds
</entry>

<entry id="h2orates" type="char*256" input_pathname="abs" category="waccm_ghg"
       group="chem_inparm" valid_values="" >
Full pathname of time-variant boundary dataset for H2O production/loss rates.
Default: set by build-namelist.
</entry>

<!-- WACCM -->

<entry id="strat_aero_feedback" type="logical" category="waccm"
       group="chem_inparm" valid_values="" >
 true =&gt; radiation feed backs from strat sulfur aerosol
Default: false
</entry>

<entry id="nlte_use_mo" type="logical" category="waccm_phys"
       group="cam_inparm" valid_values="" >
Determines which constituents are used from NLTE calculations.
TRUE implies use prognostic constituents.
FALSE implies use constituents from dataset specified by <varname>waccm_forcing_file</varname>.
Default: TRUE for full WACCM code; FALSE for WACCM_GHG.
</entry>

<entry id="qbo_cyclic" type="logical" category="waccm_phys"
       group="cam_inparm" valid_values="" >
TRUE implies assume cyclic qbo data.
Default: FALSE
</entry>

<entry id="qbo_forcing_file" type="char*256" input_pathname="abs" category="waccm_phys"
       group="cam_inparm" valid_values="" >
Filepath for qbo forcing dataset.
Default: Set by build-namelist.
</entry>

<entry id="qbo_use_forcing" type="logical" category="waccm_phys"
       group="cam_inparm" valid_values="" >
TRUE implies qbo package is active.
Default: FALSE
</entry>

<entry id="spe_data_file" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Filepath for time-variant solar proton ionization dataset.
Default: Set by build-namelist.
</entry>

<entry id="spe_filenames_list" type="char*256" input_pathname="abs" category="waccm"
       group="chem_inparm" valid_values="" >
Filepath for file that lists a series of solar proton ionization dataset files.
Default: Set by build-namelist.
</entry>

<entry id="spe_remove_file" type="logical" category="waccm"
       group="chem_inparm" valid_values="" >
TRUE implies the offline solar proton ionization data file will be deleted when 
finished with it.
Default: FALSE
</entry>

<entry id="spe_restart" type="logical" category="waccm"
       group="chem_inparm" valid_values="" >
TRUE implies restart (branch) from a previous run with solar proton events.
Default: TRUE
</entry>



<!-- SE dycore -->

<entry id="interpolate_analysis" type="logical(6)" category="se"
    group="analysis_nl" valid_values="">
If interpolate_analysis(k) = .true., then the k'th history file will be
interpolated to a lat/lon grid before output.
Default: Set by build-namelist (probably all .false.).
</entry>

<entry id="interp_nlat" type="integer" category="se"
    group="analysis_nl" valid_values="">
Latitude dimension of grid for interpolated output.
If interp_nlat and interp_nlon are zero, reasonable values will be chosen
based on the cubed-sphere resolution.
Default: Set by build-namelist.
</entry>

<entry id="interp_nlon" type="integer" category="se"
    group="analysis_nl" valid_values="">
Longitude dimension of grid for interpolated output.
If interp_nlat and interp_nlon are zero, reasonable values will be chosen
based on the cubed-sphere resolution.
Default: Set by build-namelist.
</entry>

<entry id="interp_type" type="integer" category="se"
    group="analysis_nl" valid_values="0,1">
Selects interpolation method for output on lat/lon grid.
0: Use SE's native high-order method.
1: Use a bilinear method.
Default: Set by build-namelist.
</entry>

<entry id="interp_gridtype" type="integer" category="se"
    group="analysis_nl" valid_values="1,2,3">
Selects output grid type for lat/lon interpolated output.
1: Equally spaced, including poles (FV scalars output grid).
2: Gauss grid (CAM Eulerian).
3: Equally spaced, no poles (FV staggered velocity).
Default: Set by build-namelist.
</entry>

<entry id="se_nsplit" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Number of dynamics steps per physics timestep.
Default: Set by build-namelist.
</entry>

<entry id="se_phys_tscale" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Physics timescale (in seconds) used to compute physics tendencies
If 0, feature is disabled (use dtime).
Default: Set by build-namelist. 
</entry>

<entry id="se_limiter_option" type="integer" category="se"
       group="ctl_nl" valid_values="0,4,8" >
Limiter used for horizontal tracer advection:
0: None
4: Sign-preserving limiter.
8: Monotone limiter.
Default: Set by build-namelist (probably 8).
</entry>

<entry id="vert_remap_q_alg" type="integer" category="se"
    group="ctl_nl" valid_values="0,1,2">
CAM-SE vertical remap algorithm
0: default value, Zerroukat monotonic splines
1: PPM vertical remap with mirroring at the boundaries
   (solid wall bc's, high-order throughout)
2: PPM vertical remap without mirroring at the boundaries
   (no bc's enforced, first-order at two cells bordering top and bottom
   boundaries)
Default: Set by build-namelist.
</entry>

<entry id="se_ftype" type="integer" category="se"
       group="ctl_nl" valid_values="0,1,2" >
CAM physics forcing option:
0: tendencies
1: adjustments
2: hybrid
Default: Set by build-namelist.
</entry>

<entry id="integration" type="char*80" category="se"
       group="ctl_nl" valid_values="explicit,semi_implicit" >
Time integration method.
Default: Set by build-namelist ("explicit").
</entry>

<entry id="se_ne" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Element width of resolution.
Must match value of grid. Do NOT set this yourself.
Default: Set by build-namelist.
</entry>

<entry id="qsplit" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Tracer advection is done every qsplit dynamics timesteps.
Default: Set by build-namelist.
</entry>

<entry id="rsplit" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Vertically lagrangian code updates every rsplit tracer timesteps.
If rsplit=0, vertically lagrangian code is off.
Default: Set by build-namelist.
</entry>

<entry id="hypervis_order" type="integer" category="se"
       group="ctl_nl" valid_values="2" >
Hyperviscosity operator is the Laplacian^hypervis_order.
The only supported value in CAM is "2".
Default: Set by build-namelist.
</entry>

<entry id="hypervis_subcycle" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Number of hyperviscosity subcycles per dynamics timestep.
Default: Set by build-namelist (probably 2).
</entry>

<entry id="hypervis_subcycle_q" type="integer" category="se"
       group="ctl_nl" valid_values="1" >
Number of hyperviscosity subcycles done in tracer advection code.
The only supported value in CAM is 1.
Default: Set by build-namelist.
</entry>

<entry id="energy_fixer" type="integer" category="se"
       group="ctl_nl" valid_values="-1,1,4" >
Energy fixer mode.
-1: Disabled.
 1: Enable energy fixer.
 4: Deprecated option to enable (for backwards compatibility).
Default: Set by build-namelist (probably -1).
</entry>

<entry id="nu" type="real" category="se"
       group="ctl_nl" valid_values="" >
Dynamics hyperviscosity [m^4/s].
Default: Set by build-namelist.
</entry>

<entry id="nu_div" type="real" category="se"
       group="ctl_nl" valid_values="" >
Weighting of divergence component when applying hyperviscosity.
If < 0, uses nu.
Default: Set by build-namelist.
</entry>

<entry id="nu_p" type="real" category="se"
       group="ctl_nl" valid_values="" >
Hyperviscosity applied to dp3d (layer thickness when running
vertically lagrangian dynamics) [m^4/s].
Default: Set by build-namelist.
</entry>

<entry id="nu_q" type="real" category="se"
       group="ctl_nl" valid_values="" >
Hyperviscosity applied during tracer advection [m^4/s].
If < 0, uses nu.
Default: Set by build-namelist.
</entry>

<entry id="nu_top" type="real" category="se"
       group="ctl_nl" valid_values="" >
Second-order viscosity applied only near the model top [m^2/s].
Default: Set by build-namelist.
</entry>

<entry id="se_partmethod" type="integer" category="se"
       group="ctl_nl" valid_values="4" >
Mesh partitioning method (METIS).
The only supported value in CAM is 4 (space-filling).
Default: Set by build-namelist.
</entry>

<entry id="statefreq" type="integer" category="se"
       group="ctl_nl" valid_values="" >
Frequency with which diagnostic output is written to log (output every
statefreq dynamics timesteps).
Default: Set by build-namelist.
</entry>

<entry id="se_topology" type="char*80" category="se"
       group="ctl_nl" valid_values="cube" >
SE's topology.
Only "cube" is supported in CAM.
Default: Set by build-namelist.
</entry>

<!-- CAM I/O  -->

<entry id="pio_stride" type="integer" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: 4
</entry>
<entry id="pio_numiotasks" type="integer" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: -1
</entry>
<entry id="pio_typename" type="char*80" category="pio"
       group="pio_default_inparm" valid_values="netcdf,pnetcdf,netcdf4p,netcdf4c" >
Default: "netcdf"
</entry>
<entry id="pio_root" type="integer" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: 1
<entry id="pio_debug_level" type="integer" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: 0
</entry>
<entry id="pio_blocksize" type="integer" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: -1
</entry>
<entry id="pio_buffer_size_limit" type="integer" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: 0
</entry>
<entry id="pio_async_interface" type="logical" category="pio"
       group="pio_default_inparm" valid_values="" >
Default: .false.
</entry>


<!-- DOCN -->

<entry id="restfilm" type="char*256" input_pathname="abs" category="ocn"
       group="docn_nml" valid_values="" >
Full pathname of docn restart file.
Default: set by build-namelist.
</entry>

<entry id="ocn_in" type="char*24" category="ocn"
       group="docn_nml" valid_values="" >
Full pathname of docn restart file.
Default: set by build-namelist.
</entry>

<entry id="decomp" type="char*24" category="ocn"
       group="docn_nml" valid_values="" >
Full pathname of docn restart file.
Default: set by build-namelist.
</entry>

<!-- Backwards compatibility options: support for old DOM, CSIM4 -->
<!-- SST Data -->

<entry id="bndtvs" type="char*256" input_pathname="abs" category="ocn"
       group="camexp" valid_values="" >
Full pathname of time-variant sea-surface temperature and sea-ice
concentration boundary dataset.
Default: set by build-namelist.
</entry>

<entry id="focndomain" type="char*256" input_pathname="abs" category="ocn"
       group="camexp" valid_values="" >
Full pathname of 
Default: set by build-namelist.
</entry>

<entry id="bndtvs_domain" type="char*256" input_pathname="abs" category="ocn"
       group="camexp" valid_values="" >
Full pathname of grid file for time-variant sea-surface temperature and sea-ice
concentration boundary dataset.
Default: set by build-namelist.
</entry>

<entry id="sstcyc" type="logical" category="ocn"
       group="camexp" valid_values="" >
Flag for yearly cycling of SST data. If set to FALSE, a multi-year dataset
is assumed, otherwise a single-year dataset is assumed, and SSTs will be
cycled over the first 12 values in the file.  Not used if running with
CCSM.
Default: TRUE
</entry>

<!-- CICE: These variables are passed through to the CICE build-namelist.   -->
<!--       They are provided here for convenience in setting up AMIP runs.  -->

<entry id="stream_year_first" type="integer" category="ice"
       group="camexp" valid_values="" >
The first year of the multi-year SST dataset which is read by CICE for
the prescribed ice fraction.  This needs to be set for AMIP simulations.
Default: 0
</entry>

<entry id="stream_year_last" type="integer" category="ice"
       group="camexp" valid_values="" >
The last year of the multi-year SST dataset which is read by CICE for
the prescribed ice fraction.  This needs to be set for AMIP simulations.
Default: 0
</entry>

<!-- DOM (CAM version) -->

<entry id="dom_branch_file" type="char*256" category="restart"
       group="dom_inparm" valid_values="">
Full pathname of master restart file from which to branch. Setting is
Required for branch run.
Default: none
</entry>

<!-- CSIM (CAM version) -->

<entry id="ice_conschk_frq" type="integer" category="csim"
       group="csim_inparm" valid_values="" >
This is only used when running as part of CCSM. If n &gt; 0 then sea
ice global energy checking will be done every n timesteps. If n &lt; 0 then
sea ice global energy checking will be done every n days.
</entry>

<entry id="csim_branch_file" type="char*256" category="restart"
       group="csim_inparm" valid_values="">
Full pathname of master restart file from which to branch. Setting is
Required for branch run.
Default: none
</entry>

<entry id="prognostic_icesnow" type="logical" category="csim"
       group="csim_inparm" valid_values="">
Prognostic snow over ice, currently limited to 0.5m.
If this is false then a snow climatology is used.
Default: TRUE
</entry>

<entry id="reset_csim_iceprops" type="logical" category="csim"
       group="csim_inparm" valid_values="">
If true =&gt; resets the csim ice properties to base state, i.e.,
no snow cover, TSICE and TS[1-4] are all set to
freezing.
The csim is sensitive to imbalances between the
surface temperature and ice temperatures. When
using an initial conditions dataset interpolated
from a different resolution you may have to set this
to true to get csim to run.  If set to true you will
have to allow time for the ice to spin up.
Default: FALSE
</entry>

<!-- ========================================================================================  -->
<!-- Rename component log files.  shr_file_mod::shr_file_setIO reads
     namelist /modelio/.  These variables in group camexp are treated
     specially in build-namelist, where they are put into the modelio
     namelist group in files with specific names that are read by each
     component.  --> 

<entry id="atm_logfile" type="char*256" category="driver"
       group="camexp" valid_values="">
Name of file that the atmosphere component log messages will be written to.  By
default all log messages are written to stdout.
Default: ""
</entry>

<entry id="atm_logfile_diro" type="char*256" category="driver"
       group="camexp" valid_values="">
Absolute pathname of directory that the file specified by <varname>atm_logfile</varname>
will be written to.
Default: "."
</entry>

<entry id="cpl_logfile" type="char*256" category="driver"
       group="camexp" valid_values="">
Name of file that the driver component log messages will be written to.  By
default all log messages are written to stdout.
Default: ""
</entry>

<entry id="cpl_logfile_diro" type="char*256" category="driver"
       group="camexp" valid_values="">
Absolute pathname of directory that the file specified by <varname>cpl_logfile</varname>
will be written to.
Default: "."
</entry>

<entry id="lnd_logfile" type="char*256" category="driver"
       group="camexp" valid_values="">
Name of file that the land component log messages will be written to.  By
default all log messages are written to stdout.
Default: ""
</entry>

<entry id="lnd_logfile_diro" type="char*256" category="driver"
       group="camexp" valid_values="">
Absolute pathname of directory that the file specified by <varname>lnd_logfile</varname>
will be written to.
Default: "."
</entry>

<entry id="rof_logfile" type="char*256" category="driver"
       group="camexp" valid_values="">
Name of file that the runoff component log messages will be written to.  By
default all log messages are written to stdout.
Default: ""
</entry>

<entry id="rof_logfile_diro" type="char*256" category="driver"
       group="camexp" valid_values="">
Absolute pathname of directory that the file specified by <varname>rof_logfile</varname>
will be written to.
Default: "."
</entry>


<!-- ========================================================================================  -->
<!-- CPL7 Driver -->

<!-- coupler fields -->

<entry id="flds_co2a" type="logical"  category="driver"
       group="seq_cplflds_inparm" valid_values="" >
Default: FALSE
</entry>
<entry id="flds_co2b" type="logical"  category="driver"
       group="seq_cplflds_inparm" valid_values="" >
Default: FALSE
</entry>
<entry id="flds_co2c" type="logical"  category="driver"
       group="seq_cplflds_inparm" valid_values="" >
Default: FALSE
</entry>
<entry id="flds_co2_dmsa" type="logical"  category="driver"
       group="seq_cplflds_inparm" valid_values="" >
Default: FALSE
</entry>
<entry id="cplflds_custom" type="char*80"  category="driver"
       group="seq_cplflds_userspec" valid_values="" >
Default: 
</entry>

<!-- Task/Thread layouts -->

<entry id="atm_pestride" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Stride used in selecting the processes in the atm communicator group.
Default: 1
</entry>

<entry id="atm_rootpe" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Root process of the atm communicator group.
Default: 0
</entry>

<entry id="atm_ntasks" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of atm tasks.
Default: total number of tasks assigned to job.
</entry>

<entry id="atm_nthreads" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of threads in each atm task.
Default: 1
</entry>

<entry id="lnd_pestride" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Stride used in selecting the processes in the lnd communicator group.
Default: 1
</entry>

<entry id="lnd_rootpe" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Root process of the lnd communicator group.
Default: 0
</entry>

<entry id="lnd_ntasks" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of lnd tasks.
Default: total number of tasks assigned to job.
</entry>

<entry id="lnd_nthreads" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of threads in each lnd task.
Default: 1
</entry>

<entry id="ice_pestride" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Stride used in selecting the processes in the ice communicator group.
Default: 1
</entry>

<entry id="ice_rootpe" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Root process of the ice communicator group.
Default: 0
</entry>

<entry id="ice_ntasks" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of ice tasks.
Default: total number of tasks assigned to job.
</entry>

<entry id="ice_nthreads" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of threads in each ice task.
Default: 1
</entry>

<entry id="ocn_pestride" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Stride used in selecting the processes in the ocn communicator group.
Default: 1
</entry>

<entry id="ocn_rootpe" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Root process of the ocn communicator group.
Default: 0
</entry>

<entry id="ocn_ntasks" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of ocn tasks.
Default: total number of tasks assigned to job.
</entry>

<entry id="ocn_nthreads" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of threads in each ocn task.
Default: 1
</entry>

<entry id="rof_pestride" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Stride used in selecting the processes in the rof communicator group.
Default: 1
</entry>

<entry id="rof_rootpe" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Root process of the rof communicator group.
Default: 0
</entry>

<entry id="rof_ntasks" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of rof tasks.
Default: total number of tasks assigned to job.
</entry>

<entry id="rof_nthreads" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of threads in each rof task.
Default: 1
</entry>

<entry id="cpl_pestride" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Stride used in selecting the processes in the cpl communicator group.
Default: 1
</entry>

<entry id="cpl_rootpe" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Root process of the cpl communicator group.
Default: 0
</entry>

<entry id="cpl_ntasks" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of cpl tasks.
Default: total number of tasks assigned to job.
</entry>

<entry id="cpl_nthreads" type="integer"  category="driver"
       group="ccsm_pes" valid_values="" >
Number of threads in each cpl task.
Default: 1
</entry>

<!-- Control info -->

<entry id="aqua_planet" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
If true, run model in "aqua planet" mode. Only one of
<varname>atm_adiabatic</varname>, <varname>atm_ideal_phys</varname>, or
<varname>aqua_planet</varname> can be true.
Default: FALSE
</entry>

<entry id="aqua_planet_sst" type="integer"  category="driver"
       group="seq_infodata_inparm" valid_values="1" >
Set the sst to a particular analytic solution.  **Not currently
functional** The type of analytic solution is currently hardcoded with a
parameter in ocn_comp.F90.
Default: 1
</entry>

<entry id="atm_adiabatic" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
If TRUE, do not run model physics, only run the dynamical core.
Only one of
<varname>atm_adiabatic</varname>, <varname>atm_ideal_phys</varname>, or
<varname>aqua_planet</varname> can be true.
Default: FALSE
</entry>

<entry id="atm_dep_flux" type="logical" category="driver"
       group="phys_ctl_nl" valid_values="" >
If FALSE then CAM will set the deposition fluxes to zero before sending
them to the coupler.  A side effect of setting the
variable <varname>chem_rad_passive</varname> to TRUE is that this variable
will be set to FALSE (the deposition fluxes must be set to zero in order
for the chemistry not to impact the climate).
Default: TRUE
</entry>

<entry id="atm_ideal_phys" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
If TRUE run the idealized Held&amp;Suarez physics package.
Only one of
<varname>atm_adiabatic</varname>, <varname>atm_ideal_phys</varname>, or
<varname>aqua_planet</varname> can be true.
Default: FALSE
</entry>

<entry id="bfbflag" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
bit for bit flag
Default: FALSE
</entry>

<entry id="brnch_retain_casename" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
If TRUE, use the pre-existing case name for a branch run.
Default: FALSE
</entry>

<entry id="budget_ann" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
annual budget level
Default: 1
</entry>

<entry id="budget_daily" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
daily budget level
Default: 0
</entry>

<entry id="budget_inst" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
instantaneous budget level
Default: 0
</entry>

<entry id="budget_ltann" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
long term budget level written at end of year
Default: 1
</entry>

<entry id="budget_ltend" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
long term budget level written at end of run
Default: 0
</entry>

<entry id="budget_month" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
monthly budget level
Default: 1
</entry>

<entry id="case_desc" type="char*256"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Case title.
Default: none.
</entry>

<entry id="case_name" type="char*80"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Case identifier.  The value of <varname>case_name</varname> is used in the
default filenames of both the history and restart files (see
the <varname>hfilename_spec</varname> namelist option).  The "%c" string in
the <varname>hfilename_spec</varname> templates are expanded using the
value of <varname>case_name</varname> when history filenames are created.
Default: set by build-namelist. 
</entry>

<entry id="cpl_cdf64" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Use netcdf 64 bit offset, large file support.
Default: FALSE
</entry>

<entry id="do_budgets" type="logical" category="driver"
       group="seq_infodata_inparm" valid_values="" >
T =&gt; do heat/water budget diagnostics
Default: FALSE
</entry>

<entry id="drv_threading" type="logical" category="driver"
       group="seq_infodata_inparm" valid_values="" >
T =&gt; enable run time setting of thread count for each component
Default: FALSE
</entry>

<entry id="flux_albav" type="logical" category="driver"
       group="seq_infodata_inparm" valid_values="" >
T =&gt; no diurnal cycle in ocn albedos.
Default: FALSE
</entry>

<entry id="flux_epbal" type="char*256" category="driver"
       group="seq_infodata_inparm" valid_values="" >
Selects E,P,R adjustment technique.
Default: 'off'
</entry>

<entry id="hostname" type="char*80"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Current machine.
Default: 'unknown'
</entry>

<entry id="info_debug" type="integer" category="driver"
       group="seq_infodata_inparm" valid_values="" >
Debug flag.
Default: 1
</entry>

<entry id="logfilepostfix" type="char*80" category="driver"
       group="seq_infodata_inparm" valid_values="" >
Postfix for output log files.
Default: '.log'
</entry>

<entry id="model_version" type="char*256"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Model version.
Default: 'unknown'
</entry>

<entry id="ocean_tight_coupling" type="logical"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Couple ocean on atm timestep.
Default: TRUE
</entry>

<entry id="orb_eccen" type="real"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Earth's eccentricity of orbit. (unitless: typically 0. to 0.1). Setting is
Required if <varname>orb_iyear</varname> not set.  Not used when running
as part of CCSM.
Default: none
</entry>

<entry id="orb_mode" type="char*256"  category="driver"
       group="seq_infodata_inparm" valid_values="fixed_year,variable_year,fixed_parameters" >
Mode to specify how orbital parameters are to be set.
Not used when running as part of CCSM.
Default: fixed_year
</entry>

<entry id="orb_iyear" type="integer"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Year (AD) used to compute earth's orbital parameters. If not set, then use
the values from
the <varname>orb_eccen</varname>, <varname>orb_mvelp</varname>,
and <varname>orb_obliq</varname> namelist parameters.  If only
<varname>orb_iyear</varname> is set, orbital parameters will be computed
automatically (based on Berger, 1977).  If one
of <varname>orb_eccen</varname>, <varname>orb_mvelp</varname>, or
<varname>orb_obliq</varname> is set, all three must be set.  If all four of
the above are set by the user, <varname>orb_iyear</varname> takes
precedence.  Setting is Required
unless <varname>orb_eccen</varname>, <varname>orb_mvelp</varname>,
and <varname>orb_obliq</varname> are set.  Not used when running as part of
CCSM.
Default: 1990.
</entry>

<entry id="orb_mvelp" type="real"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Earth's moving vernal equinox at perihelion (degrees: 0. to 360.0).
Setting is Required if <varname>orb_iyear</varname> not set.  Not used
when running as part of CCSM.
Default: none
</entry>

<entry id="orb_obliq" type="real"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Earth's orbital  angle of obliquity  (degrees: -90. to +90., typically 22. to 26.).
Setting is Required if <varname>orb_iyear</varname> not set.  Not used
when running as part of CCSM.
Default: none
</entry>

<entry id="outpathroot" type="char*256" category="driver"
       group="seq_infodata_inparm" valid_values="" >
Root output files
Default: './'
</entry>

<entry id="perpetual" type="logical"  category="time_mgr"
       group="seq_infodata_inparm" valid_values="" >
Set to TRUE to specify that the run will use a perpetual calendar, i.e., a
diurnal cycle will be present for the fixed calendar day specified
by <varname>perpetual_ymd</varname>.
Default: FALSE
</entry>

<entry id="perpetual_ymd" type="integer"  category="time_mgr"
       group="seq_infodata_inparm" valid_values="" >
Perpetual date encoded in an integer as (year*1000 + month*100 + day).
If <varname>aqua_planet</varname> = .true. then perpetual_ymd is ignored
and the perpetual date is set to 321.
Default: none.
</entry>

<entry id="restart_file" type="char*256" category="driver"
       group="seq_infodata_inparm" valid_values="" >
Restart filename.
Default: none
</entry>

<entry id="restart_file_override" type="char*256" category="driver"
       group="seq_infodata_inparm" valid_values="" >
List of namelist variables that may be overridden on a restart run.
Default: none
</entry>

<entry id="restart_pfile" type="char*256" category="driver"
       group="seq_infodata_inparm" valid_values="" >
Restart pointer filename.
Default: 'rpointer.drv'
</entry>

<entry id="samegrid" type="logical" category="driver"
       group="seq_infodata_inparm" valid_values="">
are ocean and ice grids same lat/lon/size
Default: TRUE
</entry>

<entry id="scmlat" type="real" category="scam"
       group="seq_infodata_inparm" valid_values="">
Latitude value of single column.
Default: none.
</entry>

<entry id="scmlon" type="real" category="scam"
       group="seq_infodata_inparm" valid_values="">
Longitude value of single column.
Default: none.
</entry>

<entry id="single_column" type="logical" category="scam"
       group="seq_infodata_inparm" valid_values="">
Set to TRUE to turn on single column mode.
Default: FALSE
</entry>

<entry id="start_type" type="char*8"  category="driver"
       group="seq_infodata_inparm" valid_values="startup,continue,branch" >
Run type.  'startup' is an initial run.  'continue' is a restart run.
'branch' is a restart run in which properties of the output history files
may be changed.
Default: 'startup'
</entry>

<entry id="username" type="char*80"  category="driver"
       group="seq_infodata_inparm" valid_values="" >
Current user.
Default: 'unknown'
</entry>

<entry id="vect_map" type="char*8"  category="driver"
       group="seq_infodata_inparm" valid_values="none,npfix,cart3d,cart3d_diag,cart3d_uvw,cart3d_uvw_diag" >
Invoke vector mapping option
Default: 'npfix'
</entry>

<!-- Reproducible Distributed Sum Calculation -->

<entry id="reprosum_use_ddpdd" type="logical"  category="reprosum"
       group="seq_infodata_inparm" valid_values="">
Flag to indicate whether to use the double-double distributed sum algorithm
rather than the (almost) infinite precision reproducible distributed sum algorithm.
Default: FALSE
</entry>

<entry id="reprosum_recompute" type="logical"  category="reprosum"
       group="seq_infodata_inparm" valid_values="">
Flag to indicate whether a distributed sum that violates the difference 
tolerance specified by reprosum_diffmax should be recomputed using 
a floating point-based (but nonscalable) reproducible algorithm.
Default: FALSE
</entry>

<entry id="reprosum_diffmax" type="real"  category="reprosum"
       group="seq_infodata_inparm" valid_values="">
Relative difference between repro and nonrepro algorithms that will 
generate a warning. This will also force a recompute using a nonscalable 
algorithm if reprosum_recompute is true. If less than zero, then
the difference will not be evaluated (and the nonrepro algorithm will not 
be computed).
Default: -1.0
</entry>

<!-- Time Manager -->

<entry id="atm_cpl_dt" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Coupling interval between the atmosphere and other system components.  This
is how frequently information can be communicated between the atmosphere
and the surface models.
Default: set by build-namelist.
</entry>

<entry id="atm_cpl_offset" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: 
</entry>

<entry id="calendar" type="char*80"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="NO_LEAP,GREGORIAN" >
Calendar type "NO_LEAP" for consistent 365-days per year or "GREGORIAN" to
include leap-years. Note that if "GREGORIAN" is selected
leap-years will be used in the time manager, but the calculation of the
earth's orbit still assumes 365 day years.  Valid values are "NO_LEAP" or
"GREGORIAN".
Default: "NO_LEAP"
</entry>

<entry id="end_restart" type="logical"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Write restart at end of run.
Default: TRUE
</entry>

<entry id="ice_cpl_dt" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: set by build-namelist.
</entry>

<entry id="ice_cpl_offset" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: 
</entry>

<entry id="lnd_cpl_dt" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: set by build-namelist.
</entry>

<entry id="lnd_cpl_offset" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: 
</entry>

<entry id="ocn_cpl_dt" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: set by build-namelist.
</entry>

<entry id="ocn_cpl_offset" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: 
</entry>

<entry id="rof_cpl_dt" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: set by build-namelist.
</entry>

<entry id="rof_cpl_offset" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Default: 
</entry>

<entry id="ref_tod" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Reference time-of-day expressed as seconds past midnight.  Used in
conjuction with <varname>ref_ymd</varname> to set the reference time.
Default: set to <varname>start_tod</varname>.
</entry>

<entry id="ref_ymd" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Reference date encoded in an integer as (year*1000 + month*100 + day).
Used in
conjuction with <varname>ref_tod</varname> to set the reference time which
is used to define a time coordinate for the output history files.  The
convention for the unit string of a time coordinate is of the form
"time-unit since reference-time", for example, "days since 1990-01-01
00:00:00".  The reference-time part of this string is specified by the
<varname>ref_ymd</varname> and <varname>ref_tod</varname> variables.

Default: set to <varname>start_ymd</varname>.
</entry>

<entry id="restart_n" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Set the restart interval as a number of elapsed time units which are specified
by <varname>restart_option</varname>.
Default: 1
</entry>

<entry id="restart_option" type="char*8"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="none,nsteps,ndays,nmonths,nyears,monthly,yearly,end" >
Set the interval between writing restart files
using one of the options 'nsteps',
'ndays', 'nmonths', or 'nyears', in conjuction
with <varname>stop_n</varname> to set the number of time units.
A convenience option allows specifying that restart files be written at the
end of each month or at the end of each year by using the options
'monthly' or 'yearly' respectively.  It is also possible to request that no
restart files be written via the option 'none', or that restart files be
written only at the end of the run via the option 'end'.
Default: 'monthly'
</entry>

<entry id="start_tod" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Start time-of-day expressed as seconds past midnight.  Used in
conjuction with <varname>start_ymd</varname> to set the start time.
Default: 0.
</entry>

<entry id="start_ymd" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Start date encoded in an integer as (year*1000 + month*100 + day).
Used in
conjuction with <varname>start_tod</varname> to set the start date of
the simulation.
Default: set by build-namelist.
</entry>

<entry id="stop_n" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Set the length of run as a number of elapsed time units which are specified
by <varname>stop_option</varname>.
Default: 1
</entry>

<entry id="stop_option" type="char*8"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="nsteps,ndays,nmonths,nyears,date" >
Set the length of run as an elapsed time using one of the options 'nsteps',
'ndays', 'nmonths', or 'nyears', in conjuction
with <varname>stop_n</varname> to set the number of elapsed time units.
Alternatively, set the final simulation time in absolute terms by using the
option 'date' in conjuction with <varname>stop_ymd</varname>,
and <varname>stop_tod</varname> to specify a date and time of day at which
the simulation should stop.
Default: 'ndays'
</entry>

<entry id="stop_tod" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Stop time-of-day expressed as seconds past midnight.  Used in
conjuction with <varname>stop_ymd</varname> to set the stop time.
Default: 0.
</entry>

<entry id="stop_ymd" type="integer"  category="time_mgr"
       group="seq_timemgr_inparm" valid_values="" >
Stop date encoded in an integer as (year*1000 + month*100 + day).
Used in
conjuction with <varname>stop_tod</varname> to set the stop date of
the simulation.
Default: none.
</entry>


<!-- ========================================================================================  -->
<!-- CLM -->

<entry id="clump_pproc" type="integer" category="clm"
       group="clm_inparm" valid_values="" >
Clumps per processor.
Default: Number of threads per process; or 1 if no OMP.
</entry>

<entry id="co2_ppmv" type="real" category="clm"
       group="clm_inparm" valid_values="" >

Default: 355.
</entry>

<entry id="co2_type" type="char*16" category="clm"
       group="clm_inparm" valid_values="constant,prognostic,diagnostic" >
Type of CO2 feedback.
Default: 'constant' for BGC mode
</entry>

<entry id="create_crop_landunit" type="logical" category="clm"
       group="clm_inparm" valid_values="" >
on if to create crop as separate landunits
Default: FALSE
</entry>

<entry id="fatmlndfrc" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of grid/landfrac data file (on atm grid).
Default: set by build-namelist.
</entry>

<entry id="fatmtopo" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of atmosphere topography data file (on atm grid).
Default: set by build-namelist.
</entry>

<entry id="finidat" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of initial conditions file.
Default: set by build-namelist.
</entry>

<entry id="flndtopo" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of land topography file.
Default: set by build-namelist.
</entry>

<entry id="fpftcon" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of PFT data file.
Default: set by build-namelist.
</entry>

<entry id="fpftdyn" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of time varying PFT data file.
Default: set by build-namelist.
</entry>

<entry id="frivinp_rtm" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of input datafile for rtm.
Default: set by build-namelist.
</entry>

<entry id="fsurdat" type="char*256" input_pathname="abs" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of surface data file.
Default: set by build-namelist.
</entry>

<entry id="fsnowoptics" type="char*256"  input_pathname="abs" category="clm" 
       group="clm_inparm" valid_values="" >
SNICAR (SNow, ICe, and Aerosol Radiative model) optical data file name
</entry>

<entry id="fsnowaging" type="char*256"  input_pathname="abs" category="clm" 
       group="clm_inparm" valid_values="" >
SNICAR (SNow, ICe, and Aerosol Radiative model) snow aging data file name
</entry>

<entry id="hist_avgflag_pertape" type="char*1(6)" category="clm"
       group="clm_inparm" valid_values="" >
Per file averaging flag.
Default: ' ',' ',' ',' ',' ',' '
</entry>

<entry id="hist_dov2xy" type="logical(6)" category="clm"
       group="clm_inparm" valid_values="" >
TRUE implies do grid averaging.  One value for each output history file.
Default: All TRUE.
</entry>

<entry id="hist_empty_htapes" type="logical" category="clm"
       group="clm_inparm" valid_values="" >
TRUE indicates no default history fields.
Default: FALSE
</entry>

<entry id="hist_fexcl1" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to exclude from history file 1.
Default: none.
</entry>

<entry id="hist_fexcl2" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to exclude from history file 2.
Default: none.
</entry>

<entry id="hist_fexcl3" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to exclude from history file 3.
Default: none.
</entry>

<entry id="hist_fexcl4" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to exclude from history file 4.
Default: none.
</entry>

<entry id="hist_fexcl5" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to exclude from history file 5.
Default: none.
</entry>

<entry id="hist_fexcl6" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to exclude from history file 6.
Default: none.
</entry>

<entry id="hist_fincl1" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to add to history file 1.
Default: none.
</entry>

<entry id="hist_fincl2" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to add to history file 2.
Default: none.
</entry>

<entry id="hist_fincl3" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to add to history file 3.
Default: none.
</entry>

<entry id="hist_fincl4" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to add to history file 4.
Default: none.
</entry>

<entry id="hist_fincl5" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to add to history file 5.
Default: none.
</entry>

<entry id="hist_fincl6" type="char*34(1000)" category="clm"
       group="clm_inparm" valid_values="" >
Fields to add to history file 6.
Default: none.
</entry>

<entry id="hist_mfilt" type="integer(6)" category="clm"
       group="clm_inparm" valid_values="" >
Per file maximum number of time samples.
Default: 30,30,30,30,30,30
</entry>

<entry id="hist_ndens" type="integer(6)" category="clm"
       group="clm_inparm" valid_values="1,2" >
Per file history output precision.
Default: 2,2,2,2,2,2
</entry>

<entry id="hist_nhtfrq" type="integer(6)" category="clm"
       group="clm_inparm" valid_values="" >
Per file history write frequency (0=monthly)
Default: 0,-24,-24,-24,-24,-24
</entry>

<entry id="hist_type1d_pertape" type="char*32(6)" category="clm"
       group="clm_inparm" valid_values="" >
Per file type1d
Default: ' ',' ',' ',' ',' ',' '
</entry>

<entry id="nrevsn" type="char*256" category="clm"
       group="clm_inparm" valid_values="" >
Full pathname of master restart file for branch run.
Default: none.
</entry>

<entry id="nsegspc" type="integer" category="clm"
       group="clm_inparm" valid_values="" >
number of segments per clump for decomposition
Default: 20
</entry>

<entry id="outnc_large_files" type="logical" category="clm"
       group="clm_inparm" valid_values="" >
on to output NetCDF files in large-file format
<default>Default: FALSE</default>
</entry>

<entry id="rest_flag" type="logical" category="clm"
       group="clm_inparm" valid_values="" >
FALSE implies don't write any restart files.
Default: TRUE
</entry>

<entry id="rtm_nsteps" type="integer" category="clm"
       group="clm_inparm" valid_values="" >
If greater than one, average rtm over rtm_nsteps time steps
</entry>

<entry id="sim_year" type="char*9" category="clm"
       group="camexp" valid_values="1850,2000,1850-2000">
This varible is only used internally by build-namelist to determine correct
defaults for datasets such as surface datasets, initial conditions, dynamic
PFT, aerosol-deposition, Nitrogen deposition rates etc.
Default: set by build-namelist.
</entry> 

<entry id="urban_hac" type="char*16" category="clm"
       group="clm_inparm" valid_values="OFF,ON,ON_WASTEHEAT" >
Urban air conditioning/heating and wasteheat
<default>Default: 'off'</default>
</entry>

<entry id="urban_traffic" type="logical" category="clm"
       group="clm_inparm" valid_values="" >
TRUE if want urban traffic flux
<default>Default: FALSE</default>
</entry>

<entry id="wrtdia" type="logical" category="clm"
       group="clm_inparm" valid_values="" >
true if want output written
Default: FALSE
</entry>

<!-- ========================================================================================  -->
<!-- RTM -->

<entry id="rtm_mode" type="logical" category="rtm"
       group="rtm_inparm" valid_values="">
River runoff
Default: NULL
</entry>

<!-- ========================================================================================  -->
<!-- physical constants: -->

<entry id="sday" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Length of siderial day [seconds].
Default: set to shr_const value
</entry>

<entry id="rearth" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Radius of Earth [m].
Default: set to shr_const value
</entry>

<entry id="gravit" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Acceleration of gravity [m/s**2].
Default: set to shr_const value
</entry>

<entry id="mwdry" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Molecular weight of dry air [g/mol]
Default: set to shr_const value
</entry>

<entry id="mwh2o" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Molecular weight of water [g/mol].
Default: set to shr_const value
</entry>

<entry id="cpwv" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Heat capacity of water vapor at constant pressure [J/kg/K].
Default: set to shr_const value
</entry>

<entry id="tmelt" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Freezing point of water [K].
Default: set to shr_const value
</entry>

<entry id="tms_orocnst" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Turbulent mountain stress parameter used when turbulent mountain stress calculation 
is turned on. See <varname>do_tms</varname>.
Default: 1.0 for CAM, set by build-namelist for WACCM, T31
</entry>

<entry id="tms_z0fac" type="real" category="physconst"
       group="physconst_nl" valid_values="" >
Factor determining z_0 from orographic standard deviation [ no unit ] 
Used when turbulent mountain stress calc is turned on. See <varname>do_tms</varname>.
set by build-namelist for WACCM, T31
</entry>

<!-- for offine unit drivers -->

<entry id="offline_driver_infile" type="char*256" input_pathname="abs" category="offline_unit_driver"
       group="offline_driver_nl" valid_values="" >
Filepath for dataset for offline unit driver.
Default: none
</entry>

<entry id="offline_driver_fileslist" type="char*256" input_pathname="abs" category="offline_unit_driver"
       group="offline_driver_nl" valid_values="" >
List of filepaths for dataset for offline unit driver.
Default: none
</entry>

<entry id="offline_driver_do_fdh" type="logical"  category="offline_unit_driver"
       group="offline_driver_nl" valid_values="" >
Switch to turn on Fixed Dynamical Heating in the offline radiation tool (PORT).
This is implemented for CAMRT only.
Default: false
</entry>

<entry id="forcing_file_loc" type="char*256"  category="forcing_mod"
       group="cam_forcing_mod" valid_values="" >
Path to the forcing file.       
Default: false
</entry>

<entry id="forcing_process" type="char*32" category="forcing_mod"
       group="cam_forcing_mod" valid_values="convect_deep,convect_shallow,vert_diff_tend,vert_diff_flx,micro_phy" >
Define which process will be executed in the CAM physics runtime.       
Default: 'convect_deep'
</entry>

<entry id="forcing_method" type="char*32" category="forcing_mod"
       group="cam_forcing_mod" valid_values="replacing,imposing,nudging" >
Define the mothod to impose the forcing: replacing will simply replace the model generated
physical tendencies by the prescribed forcing fields. Imposing will simply add the forcing
fields to the model generated tendencies. Nudging will relax the model state to the prescribed
observed fields.
Default: 'replacing'
</entry>

<entry id="forcing_utend_flag" type="logical"  category="forcing_mod"
       group="cam_forcing_mod" valid_values="">
Whether U wind (tendency) is the forcing field.
Default: FALSE 
</entry>

<entry id="forcing_vtend_flag" type="logical"  category="forcing_mod"
       group="cam_forcing_mod" valid_values="">
Whether V wind (tendency) is the forcing field.
Default: FALSE 
</entry>

<entry id="forcing_ttend_flag" type="logical"  category="forcing_mod"
       group="cam_forcing_mod" valid_values="">
Whether T wind (tendency) is the forcing field.
Default: FALSE 
</entry>

<entry id="forcing_shf_flag" type="logical"  category="forcing_mod"
       group="cam_forcing_mod" valid_values="">
Whether sensible heat flux is the forcing field.
Default: FALSE 
</entry>

<entry id="forcing_lhf_flag" type="logical"  category="forcing_mod"
       group="cam_forcing_mod" valid_values="">
Whether latent heat flux is the forcing field.
Default: FALSE 
</entry>

<entry id="forcing_time_res" type="char*32" category="forcing_mod"
       group="cam_forcing_mod" valid_values="daily,monthly" >
The time resolution of forcing data, daily or monthly.
Default: 'monthly'
</entry>

<entry id="forcing_timeframe" type="integer" category="forcing_mod"
       group="cam_forcing_mod" valid_values="" >
number of timeframes in the forcing varibale.
Default: 12 
</entry>

<entry id="forcing_start_day" type="integer" category="forcing_mod"
       group="cam_forcing_mod" valid_values="" >
If $forcing_time_res$ is set to "daily", this namelist variable
will define the fisrt day to execute cam_forcing.
Default: 1
</entry>

<entry id="forcing_relax_time" type="integer" category="forcing_mod"
       group="cam_forcing_mod" valid_values="" >
       Relaxation time in seconds, equal to 1/G in nudging equation. See http://www.ukca.ac.uk/wiki/index.php/Nudging.       
Default: 86400
</entry>

</namelist_definition>