Computer Science
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jats...47.1578d&link_type=abstract
Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 47, July 1, 1990, p. 1578-1588.
Computer Science
2
Atmospheric Models, Atmospheric Temperature, Barotropic Flow, Infrared Imagery, Polar Regions, Venus Atmosphere, Brightness Temperature, Radio Occultation, Stratosphere, Stream Functions (Fluids), Vertical Distribution, Zonal Flow (Meteorology)
Scientific paper
IR images of Venus reveal a curious double-lobed hot spot in the polar region. Elson (1982) has suggested that this dipole represents a barotropic instability associated with a high-latitude jet. Unfortunately, the classical theory of barotropic instability cannot predict temperature variations. This paper generalizes the theory to include horizontal divergence, vertical motions, and temperature variations, and applies it to the stratosphere of Venus. The fastest-growing barotropic instability in the nominal model matches the observed dipole in period and horizontal temperature pattern. The accompanying wind variations are comparable to the speed of the mean jet, indicating strong nonlinear effects. It is concluded that the Venus dipole may represent the self-limited stage of a barotropic instability with divergence.
Diner David Joseph
Dobrovolskis Anthony R.
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