Contact Information
Name: Hann-Ming Henry Juang
Telephone: 1-301-763-8000 ext 7220
Fax: 1-301-763-8545
Affiliation: DOC/NWS/NCEP/EMC
Mailing Address: WWBG, Room 201,
5200 Auth Road,
Camp Springs, MD 20746

Model Information
Model Name: NCEP regional spectral model (NCEP RSM)
Model Web Page:  
Primary Citation for Model: Juang and Kanamitsu, 1994: The NMC nested regional spectral model. Mon. Wea. Rev., 122, 3-26.
Model Dynamics-NumericsAnswerSpecifications
Model Equations: Hydrostatic 
Horizontal Domain and Map Projection:
Polar Stereographic true at:  
Lat-Lon window, pole of coordinate system coincident with geographic pole: on 
Lat-Lon window of a rotated lat-lon coordinate system, pole rotated by:  
Horizontal Resolution: 40km for Tier2, 20km for Tier1
Vertical Coordinate: sigma, P/Psfc
Vertical Levels: 28 layers
Treatment of Gravity Wave Terms: Semi-Implicit 
Specification of lateral boundary conditions: Relaxation to Reanalysis II
Model Physics AnswerSpecifications
Ocean Surface Temperature: Prescribed 
Land Surface Temperature: Computed via surface heat budget 
Land Surface Moisture: Computed via surface moisture budget 
Vegetation: USGS data
Runoff Scheme Included?: on
Surface Layer Scheme:
Bulk Type: Value of CD is:  
Similarity Theory: on 
Planetary Boundary Layer Scheme:
Bulk Type:
K-Type: Form of K: onnon-local
Turbulent Kinetic Energy Scheme:
Convection Scheme (Deep): Arakawa-Schubert 
Non-Convective Condensation:
According to What % Saturation Criterion?: on100
Sundqvist Scheme:
Explicit Scheme: Please List Prognostic Variables:  
Infrared Radiation (Free Atmosphere) Code: FGDL radiation
Data Output Answer
Size of Output:  
Format of Output: GRIB