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A case study in forecasting the stratospheric vortex during EASOE
Author(s) -
Carver G. D.,
Norton W. A.,
Pyle J. A.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl03021
Subject(s) - parametrization (atmospheric modeling) , horizontal resolution , drag , vortex , meteorology , polar vortex , environmental science , climatology , gravity wave , diffusion , geology , geodesy , atmospheric sciences , mechanics , gravitational wave , physics , radiative transfer , astrophysics , thermodynamics , quantum mechanics
Different high resolution versions of the UGAMP GCM are used to forecast the position of the stratospheric vortex for a period in January 1992. The sensitivity of these forecasts to changes in the vertical resolution, gravity wave drag parametrization scheme and horizontal diffusion are presented. The forecasts are compared to the ECMWF 5 day forecast and ECMWF analyses. For this case period, all runs produce a good 5 day forecast. Increased vertical resolution and reduced horizontal diffusion improve the 7 day forecast. The forecasts are also sensitive to the parametrization of gravity wave drag.