[BUG/ISSUE] HEMCO error with duplicate scale factors

[ktravis213]

Request a new GEOS-Chem feature:

Hi support team! In HEMCO, the scale factors are all provided a number. You have to find an unused number to add your own scale factor for any purpose. I just ran into a problem where I moved code from an older HEMCO_Config.rc to a newer one in 13.4.0 and ended up with duplicate scale factors, but only after realizing my output looked odd. Could HEMCO throw an error message or crash if there are duplicate numbers used as scale factors?

[yantosca]

Thanks for writing @ktravis213. We can make sure this is added into an upcoming HEMCO version (but realistically this might have to wait until after IGC10 in June, given other constraints).

[msulprizio]

I just encountered this issue when validating CH4 in the carbon simulation with the latest development code (GEOS-Chem 14.2.0, HEMCO 3.7.0). My simulation completed without error even though I had several scale factors IDs that were defined twice in HEMCO_Config.rc:

(((EDGARv7
20 EDGAR_SEASONAL_SF_AGS        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_AGS.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1   
21 EDGAR_SEASONAL_SF_AWB        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_AWB.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1   
22 EDGAR_SEASONAL_SF_CHE        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_CHE.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1   
23 EDGAR_SEASONAL_SF_ENE        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_ENE.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1    
24 EDGAR_SEASONAL_SF_ENF        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_ENF.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1    
25 EDGAR_SEASONAL_SF_FFF        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_FFF.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1    
26 EDGAR_SEASONAL_SF_IND        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_IND.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1    
27 EDGAR_SEASONAL_SF_IRO        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_IRO.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1   
28 EDGAR_SEASONAL_SF_MNM        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_MNM.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1   
29 EDGAR_SEASONAL_SF_PRO        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_PRO.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1  
30 EDGAR_SEASONAL_SF_PRO_COAL   $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_PRO_COAL.0.1x0.1.nc         sf_ch4 2018/1-12/1/0 C xy 1 1
31 EDGAR_SEASONAL_SF_PRO_GAS    $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_PRO_GAS.0.1x0.1.nc          sf_ch4 2018/1-12/1/0 C xy 1 1
32 EDGAR_SEASONAL_SF_PRO_OIL    $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_PRO_OIL.0.1x0.1.nc          sf_ch4 2018/1-12/1/0 C xy 1 1
33 EDGAR_SEASONAL_SF_RCO        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_RCO.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1
34 EDGAR_SEASONAL_SF_REF_TRF    $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_REF_TRF.0.1x0.1.nc          sf_ch4 2018/1-12/1/0 C xy 1 1
35 EDGAR_SEASONAL_SF_SWD_INC    $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_SWD_INC.0.1x0.1.nc          sf_ch4 2018/1-12/1/0 C xy 1 1
36 EDGAR_SEASONAL_SF_SWD_LDF    $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_SWD_LDF.0.1x0.1.nc          sf_ch4 2018/1-12/1/0 C xy 1 1
37 EDGAR_SEASONAL_SF_TNR_AV_CDS $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_TNR_Aviation_CDS.0.1x0.1.nc sf_ch4 2018/1-12/1/0 C xy 1 1
38 EDGAR_SEASONAL_SF_TNR_AV_CRS $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_TNR_Aviation_CRS.0.1x0.1.nc sf_ch4 2018/1-12/1/0 C xy 1 1
39 EDGAR_SEASONAL_SF_TNR_AV_LTO $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_TNR_Aviation_LTO.0.1x0.1.nc sf_ch4 2018/1-12/1/0 C xy 1 1
40 EDGAR_SEASONAL_SF_TNR_Other  $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_TNR_Other.0.1x0.1.nc        sf_ch4 2018/1-12/1/0 C xy 1 1
41 EDGAR_SEASONAL_SF_TNR_SHIP   $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_TNR_Ship.0.1x0.1.nc         sf_ch4 2018/1-12/1/0 C xy 1 1
42 EDGAR_SEASONAL_SF_TRO_noRes  $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_TRO_noRES.0.1x0.1.nc        sf_ch4 2018/1-12/1/0 C xy 1 1
43 EDGAR_SEASONAL_SF_WWT        $ROOT/CH4/v2023-04/EDGARv6_SF/EDGARv6_CH4_MonthlyScaleFactors_WWT.0.1x0.1.nc              sf_ch4 2018/1-12/1/0 C xy 1 1
)))EDGARv7

#==============================================================================
# --- Diurnal scale factors ---
#==============================================================================
26 GEIA_TOD_FOSSIL 0.45/0.45/0.6/0.6/0.6/0.6/1.45/1.45/1.45/1.45/1.4/1.4/1.4/1.4/1.45/1.45/1.45/1.45/0.65/0.65/0.65/0.65/0.45/0.45 - - - xy 1 1

#==============================================================================
# --- Seasonal scale factors ---
#==============================================================================
(((DICE_Africa
# from GEIA:
30 GEIA_SEASON_NOX  $ROOT/GEIA/v2014-07/GEIA_monthscal.generic.1x1.nc NOXrat 1985/1-12/1/0 C xy unitless 1
31 GEIA_SEASON_SO2  $ROOT/GEIA/v2014-07/GEIA_monthscal.generic.1x1.nc SO2rat 1985/1-12/1/0 C xy unitless 1
)))DICE_Africa

#==============================================================================
# Diurnal variablity of Chinese power plants from Liu et al. (EST, 2019)
#==============================================================================
33 PKU_pow_NOx              0.94/0.93/0.93/0.92/0.93/0.96/0.98/0.99/0.98/1.00/1.05/1.03/1.01/1.04/1.05/1.05/1.07/1.06/1.05/1.05/1.03/1.01/0.99/0.96 - - - xy unitless 1 2009
34 PKU_pow_SO2              0.92/0.91/0.90/0.89/0.90/0.93/0.97/0.98/0.99/1.02/1.07/1.04/1.03/1.06/1.06/1.07/1.10/1.10/1.06/1.05/1.03/1.01/0.99/0.93 - - - xy unitless 1 2009
35 PKU_pow_PM_BC_POC_VOC_CO 0.95/0.93/0.92/0.91/0.90/0.93/0.97/0.97/0.99/1.03/1.04/1.03/1.02/1.03/1.05/1.07/1.07/1.07/1.06/1.04/1.03/1.02/1.00/0.97 - - - xy unitless 1 2009

### These scale factors undo (Oper=-1) the global diurnal scale factors over China (Mask=2009)
#36 EDGAR_TODNOX_UNDO $ROOT/EDGARv42/v2015-02/NO/EDGAR_hourly_NOxScal.nc NOXscale 2000/1/1/* C xy unitless -1 2009
37 GEIA_TOD_FOSSIL_UNDO 0.45/0.45/0.6/0.6/0.6/0.6/1.45/1.45/1.45/1.45/1.4/1.4/1.4/1.4/1.45/1.45/1.45/1.45/0.65/0.65/0.65/0.65/0.45/0.45 - - - xy unitless -1 2009

I discovered only the second definition of the scale factor ID was used. In this case, that meant applying the incorrect scale factors to EDGARv7 CH4 emissions. We should prioritize adding a check in HEMCO to ensure that each scalID is defined only once to avoid issues like this in the future.