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Some info from the NRL Monterey site and homepage:
Quote
Overview
The Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS) is the Navy high-resolution regional operational prediction system. COAMPS is developed by NRL and consists of data quality control, data assimilation, initialization, a non-hydrostatic atmospheric model and a hydrostatic ocean model (Hodur 1997). The Arakawa C grid is used for both the atmospheric and ocean models. The atmospheric model utilizes the sigma-z vertical coordinate and the ocean model uses the hybrid Sigma/z. A version of COAMPS has recently been developed which is dedicated to the prediction of tropical cyclones (COAMPS-TC). For the HFIP tests, the model is run on a Mercator projection with one fixed coarse mesh domain and either two or three moving, two-way interactive nested domains.
Initialization
The Navy Operational Global Atmospheric Prediction System (NOGAPS) fields are used to provide the first guess field for the cold start and the COAMPS output from previous 12-hour simulations is used as the first guess for the warm start. A relocation method is used to place the vortex at the officially issued position in the first guess field for each simulation. Synthetic observations are then used to enhance the initial vortex structure. The NRL Atmospheric Variational Data Assimilation System (NAVDAS) is used to assimilate the observational data.
Lateral Boundary Conditions
COAMPS-TC uses the NOGAPS forecast output on 1-deg grid at a 6-hr interval.
Physics
The Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS) is the Navy high-resolution regional operational prediction system. COAMPS is developed by NRL and consists of data quality control, data assimilation, initialization, a non-hydrostatic atmospheric model and a hydrostatic ocean model (Hodur 1997). The Arakawa C grid is used for both the atmospheric and ocean models. The atmospheric model utilizes the sigma-z vertical coordinate and the ocean model uses the hybrid Sigma/z. A version of COAMPS has recently been developed which is dedicated to the prediction of tropical cyclones (COAMPS-TC). For the HFIP tests, the model is run on a Mercator projection with one fixed coarse mesh domain and either two or three moving, two-way interactive nested domains.
Initialization
The Navy Operational Global Atmospheric Prediction System (NOGAPS) fields are used to provide the first guess field for the cold start and the COAMPS output from previous 12-hour simulations is used as the first guess for the warm start. A relocation method is used to place the vortex at the officially issued position in the first guess field for each simulation. Synthetic observations are then used to enhance the initial vortex structure. The NRL Atmospheric Variational Data Assimilation System (NAVDAS) is used to assimilate the observational data.
Lateral Boundary Conditions
COAMPS-TC uses the NOGAPS forecast output on 1-deg grid at a 6-hr interval.
Physics
- Cumulus: Kain Fritsch Scheme and Shallow Cumulus parameterization
- Microphysics: Rutledge and Hobbs (1983)
- PBL: Mellor-Yamada, Dissipative heating (Jin et al 2007)
- Surface Layer: Louis et al (1979), Wang et al (2002), Sea Spray (Fairall et al. 1993 with recent updates), Level-off drag coefficient for high winds (Donelan et al. 2004)
- Land Surface: Noah Land Surface Model
- Radiation: Harshvardardet et al (1987)
