This is the repository for RTE+RRTMGP, a set of codes for computing radiative fluxes in planetary atmospheres. RTE+RRTMGP is described in a paper in Journal of Advances in Modeling Earth Systems.
RRTMGP uses a k-distribution to provide an optical description (absorption and possibly Rayleigh optical depth) of the gaseous atmosphere, along with the relevant source functions, on a pre-determined spectral grid given temperatures, pressures, and gas concentration. The k-distribution currently distributed with this package is applicable to the Earth's atmosphere under present-day, pre-industrial, and 4xCO2 conditions.
RTE computes fluxes given spectrally-resolved optical descriptions and source functions. The fluxes are normally summarized or reduced via a user extensible class.
Example programs and documenation are evolving - please see examples/ in the repo and Wiki on the project's Github page. Suggestions are welcome. Meanwhile for questions please contact Robert Pincus and Eli Mlawer at rrtmgp@aer.com.
cd build- Set environment variables
FC(the Fortran 2003 compiler) andFCFLAGS(compiler flags). Alternately create a Makefile.conf that sets these variables. You could also link to an existing file. - Set environment variable
RTE_KERNELStoopenaccif you want the OpenACC kernels rather than the default. make
- From the root RTE+RRTMGP directory:
cd examples/rfmip-clear-sky. - Set environment variables
NCHOMEandNFHOMEto the root directories of the Netcdf C and Fortran libraries respectively. Set environment variableRRTMGP_DIRto the location of the libraries (../../build) in the default layout). make- Python scripts are provided to stage the files needed (
stage_files.py), run the examplesrun-rfmip-examples.py), and compare to results computed on an example host (compare-to-reference.py). The python scripts require modules xarray and netCDF.