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Dynamics of planetary-scale baroclinic waves during Southern Hemisphere winterThe characteristics of linear and finite amplitude baroclinic waves during Southern Hemisphere winter were investigated using a three-dimensional global primitive-equation spectral mode, with emphasis on the dynamics of planetary scale modes which propagate into the stratosphere. Linear stability computations showed that the winter zonally averaged basic state is baroclinically unstable, with the most unstable modes being Charney-type modes; however, the results showed that Green-type modes also exist; these give much larger relative amplitude in the stratosphere although they have smaller growth rates. The results suggest that the existence of both Charney and Green modes might explain certain observed properties of the eastward traveling waves, such as the lack of coherence between troposphere and stratosphere at zonal wavenumbers 1 and 2.
Document ID
19890053971
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Young, Richard E.
(NASA Ames Research Center Moffett Field, CA, United States)
Houben, Howard
(Mycol, Inc. Sunnyvale, CA, United States)
Date Acquired
August 14, 2013
Publication Date
May 15, 1989
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 46
ISSN: 0022-4928
Subject Category
Meteorology And Climatology
Accession Number
89A41342
Distribution Limits
Public
Copyright
Other

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