The scripts in this directory were used to create GCHP restart files from
GEOS-Chem Classic restart files. Bash script convert_GCC_rst_to_GCHP_rst.sh
regrids a GEOS-Chem Classic restart file to 5 cubed sphere resolutions:
c24, c48, c90, c180, and c360. It also pre-processes the GEOS-Chem Classic
data to remove extraneous variables and renames those remaining using python
script change_SpeciesRst_to_SPC.py.

GCHP restart generation scripts require csregridtool which can be downloaded
from: https://bitbucket.org/sdeastham/csregridtool/. They also require a
python environment loaded.

Steps to reproduce GCHP restart file generation:
1. clone csregridtool in a location with lots of memory available
2. cd csregridtool
3. set symbolic link regrid.env to an environment file that loads fortran
   compiler, netcdf libraries, and nco
4. source regrid.env
5. make clean
6. make
7. Copy files to csregridtool:
      a. GEOS-Chem Classic restart file into csregridtool
      b. convert_GCC_rst_to_GCHP_rst.sh and 
      c. change_SpeciesRst_to_SPC.py
8. load a python environment if python not available locally
8. run convert_GCC_rst_to_GCHP_rst.sh, passing two arguments:
      a. GEOS-Chem Classic restart filename
      b. GCHP restart filename prefix (will append .c{res}.nc4)   
   For example:
./convert_GCC_rst_to_GCHP_rst.sh GEOSChem.Restart.TransportTracers.20170101_0000z.nc4 GCHP.Restart.TransportTracers.20170101_0000z

~Lizzie Lundgren, 8/28/2020