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Regional Data Assimilation Using a Stretched-Grid Approach and Ensemble CalculationsThe global variable resolution stretched grid (SG) version of the Goddard Earth Observing System (GEOS) Data Assimilation System (DAS) incorporating the GEOS SG-GCM (Fox-Rabinovitz 2000, Fox-Rabinovitz et al. 2001a,b), has been developed and tested as an efficient tool for producing regional analyses and diagnostics with enhanced mesoscale resolution. The major area of interest with enhanced regional resolution used in different SG-DAS experiments includes a rectangle over the U.S. with 50 or 60 km horizontal resolution. The analyses and diagnostics are produced for all mandatory levels from the surface to 0.2 hPa. The assimilated regional mesoscale products are consistent with global scale circulation characteristics due to using the SG-approach. Both the stretched grid and basic uniform grid DASs use the same amount of global grid-points and are compared in terms of regional product quality.
Document ID
20020042892
Document Type
Conference Paper
Authors
Fox-Rabinovitz, M. S. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Takacs, L. L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Govindaraju, R. C. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Atlas, Robert
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Computer Programming and Software
Meeting Information
82nd American Meteorological Society Meeting(Orlando, FL)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.