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Effect of high latitude filtering on NWP skillThe high latitude filtering techniques commonly employed in global grid point models to eliminate the high frequency waves associated with the convergence of meridians, can introduce serious distortions which ultimately affect the solution at all latitudes. Experiments completed so far with the 4 deg x 5 deg, 9-level GLAS Fourth Order Model indicate that the high latitude filter currently in operation affects only minimally its forecasting skill. In one case, however, the use of pressure gradient filter significantly improved the forecast. Three day forecasts with the pressure gradient and operational filters are compared as are 5-day forecasts with no filter.
Document ID
19840013998
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Kalnay, E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Takacs, L. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hoffman, R. N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Res. Rev., 1983
Subject Category
Geophysics
Accession Number
84N22066
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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