rte-ecckd

This project aims to make the ECCKD gas optics tool conform to the radiative transfer API as defined in RTE-RRTMGP.

How to build

Dependencies

The first step is to compile and install the following dependencies:

• A fortran compiler (gfortran, ifort, etc.)
• make
• netCDF
• netCDF-fortran
• hdf5
• The rte and rrtmgp libraries

Compiling the rte_ecckd library

Currently a simple Makefile is provided in the base of this repository. This will be replaced with an actual build system in the future. For now, the library can be compiled using make:

FC=<path to fortran compiler> FCFLAGS="-I<directory where rte and rrtmgp modules are installed> -g -O0" make

Compiling the test programs

Test programs that run the CMIP6 RFMIP RAD-IRF 100 column test cases are provided. They can also be compiled using make:

FC=<path to fortran compiler> \
FCFLAGS="-I<directory where rte and rrtmgp modules are installed> -I<directory where netcdff module is installed> -g -O0" \
LDFLAGS="-L. -L<directory where netcdff library is installed> -L<directory where netcdf library is installed> -L<directory where hdf5 library is installed>" \
LIBDIR="<directory where rte and rrtmgp static libraries are installed" \
make test

How to run the tests

Before you can run the tests, you must download the necessay input data. A simple bash script is provided:

bash download-data-files.sh

After the data is downloaded, the tests can be run as follows:

# Calculates longwave fluxes
ecckd_rfmip_lw multiple_input4MIPs_radiation_RFMIP_UColorado-RFMIP-1-2_none.nc data/ecckd-1.2_lw_ckd-definition_climate_fsck-tol0.0161.nc

# Calculate shortwave fluxes
ecckd_rfmip_sw multiple_input4MIPs_radiation_RFMIP_UColorado-RFMIP-1-2_none.nc data/ecckd-1.2_sw_ckd-definition_climate_wide-tol0.05.nc