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Maintenance of quasi-stationary waves in a two-level quasi-geostrophic spectral model with topographyA study of the maintenance of the quasistationary waves forced by topography using a truncated two-level quasigeostrophic spectral model in a zonal channel on a beta-plane is presented. The model's motion contains wavenumbers 0, n, and 2n in the zonal direction, where n is the lowest eddy wavenumber and also the wavenumber of the topography. The study covered the two cases defined by n=2 and n=3; the spectral mode was integrated by initially perturbing the stationary solution of the equations governing the spectral coefficients, and a detailed energetics study was made of the quasiequilibrium state to study the maintenance of the quasistationary waves. The energy conversions required for maintaining these waves when n=3 imply that they are generated mainly by baroclinic stability of the forced waves; this type of baroclinic wave tends to become stationary to draw efficiently on the available energy of the forced wave.
Document ID
19800038492
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Yao, M.-S.
(NASA Goddard Institute for Space Studies New York, N.Y., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 37
Subject Category
Meteorology And Climatology
Accession Number
80A22662
Funding Number(s)
CONTRACT_GRANT: NGR-05-007-328
CONTRACT_GRANT: NSF ATM-72-01502
Distribution Limits
Public
Copyright
Other

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