Add a new cdeps test to validate GFS v16 data mode in CDEPS

[binli2337]

Description

The GFS v16 data mode will be added to the develop branch of NOAA-EMC/CDEPS next week from PR#40. A new test (“datm_cdeps_3072x1536_cfsr”) needs to be added to validate the new data mode.

Solution

The new test will be created with the following steps:

1. A new ESMF mesh file will be created using GFS v16 forcing grid (Gaussian grid: 3072x1536).
2. The current CFSR forcing files in the RT input directory will be interpolated to the GFS v16 grid using ESMF regridding tools.
3. A new file for the input data will be added to the fv3_conf directory.
4. The new test will be added to the tests directory.

Both the new test and datm_cdeps_control_cfsr test will be run for 5 days and results from these two runs will be analyzed and compared.

Once GFS v16 forcing files are available, the datm_cdeps_3072x1536_cfsr will be converted to datm_cdeps_gfsv16 by replacing the input forcing files with GFS v16 data.

Alternatives

If applicable, add a description of any alternative solutions or features you've considered.

Related to

• Add Fortran code used by GFS v16 data mode NOAA-EMC/CDEPS#40

[binli2337]

The following two 5-day runs have been performed to validate GSFv16 data mode in CDEPS:

1. Using MOM6+CICE6+CFSR(1760x880)
2. Using MOM6+CICE6+CFSR(3072x1536)

The CFSR(1760x880) forcing is the original CFSR forcing. The CFSR(3072x1536) forcing files are obtained by interpolating the original CFSR data to the GFSv16 grid using ESMF regridding tools. The horizontal grid used in MOM6/CICE6 is one degree tripolar grid.

The following figures show a few fields from those two runs.

Fig.1 NINO3.4 SST

Fig.2 SST on day 5 of the simulations

Fig.3 Ocean potential temperature on day 5 (cross-section along the equator)

Fig.4 Ocean salinity on day 5 (cross section along the equator)

Fig.5 Seaice Thickness (Northern Hemisphere) on day 5

Fig.6 Seaice Thickness (Southern Hemisphere) on day 5