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Convectively generated stratospheric gravity waves - The role of mean wind shearA two-dimensional numerical simulation of mid-latitude squall lines is used to study the properties of storm-induced stratospheric gravity waves. Owing to the tendency for convective cells to form at the forward edge of a squall line, and then propagate toward the rear, the simulated storms preferentially generate gravity waves that propagate toward the rear of the storm. This anisotropy in gravity wave generation leads to a net vertical transfer of momentum into the stratosphere. Cases with and without stratospheric mean wind shear are compared. In the latter case Doppler shifting of the waves to lower frequencies leads to wave breaking and enhanced wave - mean-flow interaction.
Document ID
19930068183
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Holton, J. R.
(NASA Headquarters Washington, DC United States)
Durran, D.
(Washington Univ. Seattle, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publisher: Kluwer Academic Publishers
Subject Category
Meteorology And Climatology
Accession Number
93A52180
Funding Number(s)
CONTRACT_GRANT: NAGW-662
CONTRACT_GRANT: NSF ATM-88-13971
Distribution Limits
Public
Copyright
Other

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