Use fractional vegetation and soil data, allow mosaic_lu=1, mosaic_soil=1 to be used in RUC_LSM

[natalie-perlin]

Description

Allow use of fractional vegetation and soil options that estimate surface properties for the grid cell, such as roughness length, leaf area index (LAI), etc. These properties are used in surface RUC_LSM scheme that is employed by physics suites FV3_HRRR, FV3_HRRR_gf, and RRFS_sas. At the moment, surface parameters corresponding to the dominant land-use category for the grid cell is used for the entire grid cell.

Solution

• It requires adapting some of the scripts from the UFS_UTILS that process these fractional vegetation and soil data and prepare the sfc_data files with the surface data parameters.
• Processing these large dataset of 30s soil and vegetation data apparently requires "bigmem" nodes, which may not be available on all platforms. It needs to be tested to verify that requirement, and to have SRW scripts, options, and documentation to adapt or/and point at this requirement.
• Staging the additional input files in the SRW-dedicated locations across the Tier 1 platforms

Requirements**

• Testing of the UFS_UTILS scripts may need to be done to validate the logic of several machine- and user-specific scripts, as well as to test it for custom-generated grids.
• Suites that employ RUC_LSM surface scheme have the fractional surface data options turned on, mosaic_lu=1 and mosaic_soil=1.

Acceptance Criteria (Definition of Done)

Tests involving RUC_LSM in the suites FV3_HRRR, FV3_HRRR_gf, RRFS_sas produce reasonable results as compared to the no-fractional approach, when the dominant land-use and soil category is used.

Dependencies (optional)

Alternative Solutions (optional)