UIUC model configurations

MM5

• General: MM5: version 3-6-1; multi-physics, multi-resolution.
• Data: all initialized with the NCEP Eta 212 grids (MM5g (GFS) and MM5h (RUC) planned)
• 12-km runs:
  • Domains: two, 125x103 and 118x112.
  • Grid spacing: 36/12-km horizontal, 23 half-sigma layers.
  • Physics: Simple ice (Dudhia), multi-layer soil model, shallow convection, and the following combinations:
    1. MM5a: Blackadar PBL, Grell cumulus parameterization
    2. MM5b: Blackadar PBL, Kain-Fritsch CUPA
    3. MM5c: Eta-Mellor-Yamada PBL, Grell CUPA
    4. MM5d: Eta-Mellor-Yamada PBL, Kain-Fritsch CUPA
• 24-km runs:
  • Domains: two, 70x49 and 70x64.
  • Grid spacing: 72/24-km horizontal, 23 half-sigma layers.
  • Physics: Same as above, with following combinations:
    1. MM5e: Eta-Mellor-Yamada PBL, Grell CUPA
    2. MM5f: Eta-Mellor-Yamada PBL, Kain-Fritsch CUPA
    3. MM5g: Eta-Mellor-Yamada PBL, Kain-Fritsch CUPA, GFS data planned
    4. MM5h: Eta-Mellor-Yamada PBL, Kain-Fritsch CUPA, RUC data planned
• Model information: here.

Workstation Eta

• General: multi-analysis, using either the Eta 212 or GFS analyses
• Domains: one, 107x179
• Grid spacing: approx. 12 km horizontal, 38 levels
• Model information: here
• Temporarily discontinued for research WRF runs on the same Linux PC.

Weather Research and Forecasting model (WRF)

• General: multi-analysis, multi-resolution and multi-physics
• Version 1.3, mass dynamical core, 3rd-order Runge-Kutta:
  1. Initialization: Eta 212 data
  2. Domains and grid spacing: one grid, 66x64 (24-km); 31 levels.
  3. Physics, for run WRF-a: NCEP 3-class microphysics, Dudhia SW radiation, MRF PBL, KF cumulus parameterization, thermal diffusion
• Version 2.0.2, Advanced Research WRF (ARW) dynamical core, mass coordinate
  1. Initialization: Eta 212, GFS, or RUC (Eta BC) data
  2. Domain: 66x64 (24 km; 12-km runs planned after assessment of 24-km results); 31 levels.
  3. Physics: all use RRTM longwave radiation, Dudhia shortwave, 10 mins between radiation calls, boundary layer physics called every step, cloud effects on radiation, WRFSI landuse/soil data, 100s time step, 3rd-order Runge-Kutta time integration, no turbulence or explicit filters, no W damping (at present), no upper-level damping, smdiv=0.1, emdiv=0.01 (both of these parameters were tested at zero without much sensitivity noted), epssm=0.1, 4 sound steps per large step. Specific configurations:
     1. WRF-b, Lin/KF/Eta: Lin µphys, Kain-Fritsch CUPA, Janjic Eta surface-layer, RUC land surface model (LSM), Mellor-Yamada-Janjic (Eta) PBL
     2. WRF-c, Lin/KF/Noah: as in WRF-b, but with Monin-Obukhov surface-layer, Noah LSM, YSU PBL.
     3. WRF-d, Lin/GR/Noah: as in WRF-c, but with Grell-Devenyi ensemble cumulus scheme.
     4. WRF-e, Wsm5/GR/Noah: as in WRF-d, but with WSM 5-class ice scheme.
     5. WRF-f: same as WRF-d, but with RUC IC/Eta BC data. (planned)
     6. WRF-g: same as WRF-d, but with GFS IC/BC data.