Baroclinic Instability at Short Wavelengths in Vertically Discrete Quasi-Geostrophic and Ageostrophic ModelsSource: Journal of the Atmospheric Sciences:;1988:;Volume( 045 ):;issue: 021::page 3305Author:Staley, D. O.
DOI: 10.1175/1520-0469(1988)045<3305:BIASWI>2.0.CO;2Publisher: American Meteorological Society
Abstract: Short wavelength linear baroclinic instability is examined numerically in two quasi-geostrophic models and one ageostrophic model. The growth rate spectra for the ageostrophic model differ little from those of the quasi-geostrophic models in three cases with different arrangements of shear and static stability. In all models and cases, and for 26 vertical levels, peaks of instability were found at very short wavelengths of a few hundred kilometers. These apparently represent spurious critical layer instability appearing at discrete levels, as suggested by Arakawa. They disappear when very high vertical resolution (e.g., 150 levels) is used.
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contributor author | Staley, D. O. | |
date accessioned | 2017-06-09T14:28:31Z | |
date available | 2017-06-09T14:28:31Z | |
date copyright | 1988/11/01 | |
date issued | 1988 | |
identifier issn | 0022-4928 | |
identifier other | ams-19928.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4156098 | |
description abstract | Short wavelength linear baroclinic instability is examined numerically in two quasi-geostrophic models and one ageostrophic model. The growth rate spectra for the ageostrophic model differ little from those of the quasi-geostrophic models in three cases with different arrangements of shear and static stability. In all models and cases, and for 26 vertical levels, peaks of instability were found at very short wavelengths of a few hundred kilometers. These apparently represent spurious critical layer instability appearing at discrete levels, as suggested by Arakawa. They disappear when very high vertical resolution (e.g., 150 levels) is used. | |
publisher | American Meteorological Society | |
title | Baroclinic Instability at Short Wavelengths in Vertically Discrete Quasi-Geostrophic and Ageostrophic Models | |
type | Journal Paper | |
journal volume | 45 | |
journal issue | 21 | |
journal title | Journal of the Atmospheric Sciences | |
identifier doi | 10.1175/1520-0469(1988)045<3305:BIASWI>2.0.CO;2 | |
journal fristpage | 3305 | |
journal lastpage | 3310 | |
tree | Journal of the Atmospheric Sciences:;1988:;Volume( 045 ):;issue: 021 | |
contenttype | Fulltext |