Navy Global Environmental Model

The Navy Global Environmental Model (NAVGEM) is a global numerical weather prediction computer simulation run by the United States Navy's Fleet Numerical Meteorology and Oceanography Center. This model is run four times a day and produces weather forecasts out to 180 hours, one-way coupled to HyCOM, and is ESMF-compliant via the NUOPC layer.  NAVGEM replaced NOGAPS, which had been running since 1982.  NAVGEM uses the NRL-developed 4DVAR Naval Research Laboratory Atmospheric Variational Data Assimilation System-Accelerated Representor (NAVDAS-AR) for data assimilation.  NAVGEM 1.3 has 425 spectral waves and 50 vertical levels for 31 km horizontal resolution.

Further Information:

http://www.nrlmry.navy.mil/metoc/nogaps/navgem.html

GFS

Global Forecast System

Global Weather Forecast Model run by the National Centers for Environmental Prediction.  It is a weakly coupled model with four components:  atmosphere, ocean (HyCOM), land/soil (Noah), and sea ice model (KISS), a statistical extrapolation model.  GFS evolved out of the earlier AVN aviation and MRF models; the NCEP NEMS (NOAA Environmental Modeling System) framework is ESMF-compliant.  GFS has 1524 spectral waves with 64 vertical levels.  Horizontal resolution is 13km.  Data assimilation is provided by the Global Data Assimilation System (GDAS), a 3D-VAR technique.

Further Information:

http://www.ncdc.noaa.gov/data-access/model-data/model-datasets/global-forcast-system-gfs