Overview of Schemes and Suites

Table of Contents

• Physical Parameterizations and Suites

Physical Parameterizations and Suites

The UFS-SRW App. assembles the parameterizations in suites.

Radiation

• GFS RRTMG Shortwave/Longwave Radiation Scheme

PBL and Turbulence

• GFS Scale-aware TKE-based Moist Eddy-Diffusion Mass-Flux (EDMF) PBL and Free Atmospheric Turbulence Scheme
• MYNN-EDMF Boundary Layer and Shallow Cloud Scheme with Subgrid-scale Cloud Interstitial

Land Surface Model

• GFS Noah Land Surface Model
• RUC Land Surface Model
• GFS NoahMP Land Surface Model
• CLM Lake Model

Cumulus Parameterizations

• GFS Scale-Aware Simplified Arakawa-Schubert (sa-SAS) Deep Convection Scheme
• GFS SAS-based Mass-Flux Scheme for Shallow convection (sa-MF)
• Grell-Freitas Scale and Aerosol Aware Convection Scheme

Microphysics

• GFDL Cloud Microphysics Scheme
• Thompson Aerosol-Aware Cloud Microphysics Scheme
• NSSL 2-moment Cloud Microphysics Scheme

Ozone Photochemical Production and Loss

• GFS Ozone Photochemistry (2015) Scheme

Water Vapor Photochemical Production and Loss

• GFS Stratospheric H2O Scheme

Gravity Wave Drag

• Unified Gravity Wave Physics Scheme - Version 0
• GSL Drag Suite Scheme

Surface Layer

• GFS Surface Layer Scheme
• MYNN Surface Layer Scheme

Simplified Ocean and Sea Ice Representation

• GFS Near-Surface Sea Temperature Scheme
• GFS Simple Ocean Scheme
• GFS Sea Ice Scheme

Others

• Stochastically-Perturbed Parameterizations (SPP)

The input information for the parameterizations includes the values of the gridbox mean prognostic variables (wind components, temperature, specific humidity, cloud fraction, water contents for cloud liquid, cloud ice, rain, snow, graupel, and ozone concentration), the provisional dynamical tendencies for the same variables and various surface fields, both fixed and variable.

The time integration of the physics suites is based on the following:

• The tendencies from the different physical processes are computed by the parameterizations or derived in separate interstitial routines.
• The first part of the suite, comprised of the parameterizations for radiation, surface layer, surface (land, ocean, and sea ice), and boundary layer is computed using a hybrid of parallel and sequential splitting described in Donahue and Caldwell (2018) [50], a method in which the various parameterizations use the same model state as input but are impacted by the preceding parameterizations. The tendencies from the various parameterizations are then added together and used to update the model state.
• The surface parameterizations (land, ocean and sea ice) are invoked twice in a subcycling loop, with the first time to create a guess, and the second time to produce the tendencies.
• The second part of the physics suite, comprised of the parameterizations of gravity wave physics, ozone, stratospheric water vapor, deep and shallow convection (if using), and microphysics, is computed using sequential splitting in the order listed above, in which the model state is updated between calls to the parameterization.
• If the in-core saturation adjustment is used (do_sat_adj=.true.), it is invoked at shorter timesteps along with the dynamical solver.

The UFS Short Range Weather Application (SRW App) v2.2.0 supports four physics suites.

Table 1. Physics suites and primary schemes supported in SRW v2.2.0

Physics suites	GFS_v16	HRRR	RRFS_v1beta	WoFS_v0	RAP
Deep Cu	GFS Scale-Aware Simplified Arakawa-Schubert (sa-SAS) Deep Convection Scheme	off	off	off	Grell-Freitas Scale and Aerosol Aware Convection Scheme
Shallow Cu	GFS SAS-based Mass-Flux Scheme for Shallow convection (sa-MF)	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme	Grell-Freitas Scale and Aerosol Aware Convection Scheme
Microphysics	GFDL Cloud Microphysics Scheme	Thompson Aerosol-Aware Cloud Microphysics Scheme	Thompson Aerosol-Aware Cloud Microphysics Scheme	NSSL 2-moment Cloud Microphysics Scheme	Thompson Aerosol-Aware Cloud Microphysics Scheme
PBL/TURB	GFS Scale-aware TKE-based Moist Eddy-Diffusion Mass-Flux (EDMF) PBL and Free Atmospheric Turbulence Scheme	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme	MYNN-EDMF Boundary Layer and Shallow Cloud Scheme
Radiation	GFS RRTMG Shortwave/Longwave Radiation Scheme	GFS RRTMG Shortwave/Longwave Radiation Scheme	GFS RRTMG Shortwave/Longwave Radiation Scheme	GFS RRTMG Shortwave/Longwave Radiation Scheme	GFS RRTMG Shortwave/Longwave Radiation Scheme
Surface Layer	GFS Surface Layer Scheme	MYNN Surface Layer Scheme	MYNN Surface Layer Scheme	MYNN Surface Layer Scheme	MYNN Surface Layer Scheme
LSM	GFS Noah Land Surface Model	RUC Land Surface Model and CLM Lake Model	GFS NoahMP Land Surface Model	GFS Noah Land Surface Model	RUC Land Surface Model
Gravity Wave Drag	Unified Gravity Wave Physics Scheme - Version 0	GSL Drag Suite Scheme	Unified Gravity Wave Physics Scheme - Version 0	Unified Gravity Wave Physics Scheme - Version 0	GSL Drag Suite Scheme
Ice and Snow	GFS Sea Ice Scheme	RUC Land Surface Model	GFS Sea Ice Scheme	GFS Sea Ice Scheme	RUC Land Surface Model