WRF_little_r

These scripts were created to convert CSV files to WRF little r format needed for observation nudging. They are adapted from other Github pages (see reference links below).

Further info

This script creates little_r formatted files to be used in WRF. They are part of the input files needed for observation nudging.

The script makes use of the function time_series_to_little_r, which is a FORTRAN wrapper found in time_series_converter.py and record.py

Wrapper sources:

https://github.com/tommz9/python-little_r

https://github.com/valcap/csv2little_r

Note that:

• You need to install the Python packages needed to run this script:

    $ pip install -r requirements.txt 
  

• After running this script, you need to convert it to the format needed by WRF

• You do that by running:

    $ perl RT_fdda_reformat_obsnud.pl OUTPUT/obs:2021-04-14_02
    
    $ perl RT_fdda_reformat_obsnud.pl OUTPUT/obs:2021-04-14_03
    
    $ (and so on)
  

• This will produce files with extension .obsnud, which you will concatenate (see example below)

• You will also need to change the file name to OBS_DOMAIN101 for domain 1, and OBS_DOMAIN201 for domain 2, and so on, as described in the WRF Users' manual

       $ cat *.obsnud >> OBS_DOMAIN101
  

Adapted here by: Michel Mesquita, Ph.D. (July 2021)