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Title:Gravity Wave/large-Scale Flow Interactions: A Comparison of Model Predication and Observation
Author(s):Herman, Redina Lee
Doctoral Committee Chair(s):Robinson, Walter A.
Department / Program:Atmospheric Sciences
Discipline:Atmospheric Sciences
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Atmospheric Science
Abstract:These observed interaction signatures are then compared to the interaction signatures predicted by three commonly used gravity-wave parameterizations: critical level filtering, linear saturation filtering, and diffusive filtering. A one-dimensional, time-independent model filters various gravity-wave spectra using the criteria for each of these parameterizations. Background wind profiles for different times during the large-scale flow event are used to obtain filtered gravity-wave activity signatures that vary over time. In order to reproduce the observed interaction signature for both large-scale flow events, a broad spectrum released at 55 km was needed. These model results would indicate that the gravity waves that reach the mesosphere do not propagate from the troposphere, but are generated more locally.
Issue Date:2003
Description:135 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.
Other Identifier(s):(MiAaPQ)AAI3101860
Date Available in IDEALS:2015-09-28
Date Deposited:2003

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