13. Using another physics suite

There are occasions when researchers are interested in using another physics suite. This pertains to setting up the suite definition file (SDF), suitable namelists, and specific field table.

13.1. Check if the suite is supported

The currently supported physics suites for UFS MRW App v1.1, UFS weather model, UFS SRW App v1.0 are shown in the table below. Regarding the UFS weather model, the physics suites supported by the public release of CCPP v5.0 are listed here.

Supported physics suites

MRW v1.1	CCPP v5.0	SRW v1.0
GFSv15p2	GFSv15p2	GFSv15p2
GFSv16beta	GFSv16beta	RRFS.v1alpha
	csawmg
	RRFSv1alpha

13.2. Compose another physics suite

In addition to the physics suites supported by the public release listed above, it is possible to use the Global Workflow to conduct experiments using other suites included in the development branch of fv3atm, under the directory of fv3atm/ccpp/suites. Example physics suites include RAP, HRRR, RRFS_v1beta, GSD_noah, etc. Note that these physics suites are still in the developmental stage and users need caution to set up the correct namelist and field table. The CCPP Technical Documentation provides guidance on adding a new scheme and a new SDF.

13.3. Change the namelist

The MRW App adopts the Common Infrastructure for Modeling the Earth (CIME) workflow. One can change the namelist through editing the file user_nl_ufsatm and running ./case.submit to update the namelist (Source: UFS Medium-Range Weather App Users Guide).

The Global Workflow is used to run the up-to-date UFS weather model. Here, the namelist can be changed in exglobal_forecast.sh under the directory of global-workflow/scripts.

In the SRW App, which uses the regional workflow, the namelist parameters are changed in the file config.sh within the ush directory (Source: UFS Short-Range Weather App Users Guide).