Global-scale waves in the Venus atmosphere

Details Global-scale waves in the Venus atmosphere Global-scale waves in the Venus atmosphere

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jats...50.4080s&link_type=abstract

Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 50, no. 24, p. 4080-4096

Computer Science

Numerical Analysis

10

Atmospheric Models, Oscillations, Venus (Planet), Venus Atmosphere, Venus Clouds, Wind Velocity, Advection, Numerical Analysis, Three Dimensional Models

Scientific paper

The nature of global-scale waves that can exist in the atmosphere of Venus is examined. A linear three-dimensional model atmosphere with spherical geometry is used to study large-scale forced and free waves. Solutions are obtained numerically with grid points in the vertical and a spherical harmonic expansion in the horizontal. Observations have shown a global-scale traveling wave with phase speed near the cloud-top wind velocity. Global-scale wave modes are found to exist in the model at this velocity. When a radiative-dynamic cloud feedback is added to the model, the most unstable wave mode is found to have the same phase speed as the observed wave. The horizontal structure of this wave is consistent with the observed horizontal structure of the 'Y' feature seen in ultraviolet images of the Venus cloud top.

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