The Comparison of the Unified Model (UM) and Global Forecast System (GFS) as Input Data for the Weather Research and Forecasting Model

Report No. ARL-TN-0484
Authors: Jeffrey E. Passner, James L. Cogan, and Patrick A. Haines
Date/Pages: May 2012; 14 pages
Abstract: The fielded Meteorological Measuring Set-Profiler (MMS-P) and the Computer Meteorological Data-Profiler (CMD-P) were evaluated by the Battlefield Environment Division, U.S. Army Research Laboratory (ARL) to compare the Computer Meteorological Message (METCM) on each system using the same input data. Both rely on the Navy Operational Global Atmospheric Prediction System (NOGAPS) forecast data and regional surface and upper-air soundings (if available and current in time) transmitted from the Air Force Weather Agency (AFWA) to initialize and update the on-board mesoscale model. The model for both systems is the Fifth-Generation Penn State/National Center for Atmospheric Research Mesoscale Model (MM5). The product manager for the CMD-P has agreed that future versions of the CMD-P will incorporate a new modeling environment with the Weather Research and Forecasting Model (WRF) as the modeling basis. This upgrade would include a new, coarse-scale model for the input of initial and boundary conditions. This paper discusses two different sources of model initialization data for the proposed follow-on CMD-P; the Global Forecast System (GFS) and the United Kingdom Meteorological Office's (UKMO's) Unified Model (UM).
Distribution: Approved for public release
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Last Update / Reviewed: May 1, 2012