Cloud patterns, waves and convection in the Venus atmosphere

Details Cloud patterns, waves and convection in the Venus atmosphere Cloud patterns, waves and convection in the Venus atmosphere

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jats...33.1394b&link_type=abstract

Journal of the Atmospheric Sciences, vol. 33, Aug. 1976, p. 1394-1417.

Physics

21

Atmospheric Physics, Convective Flow, Gravity Waves, Mariner 10 Space Probe, Ultraviolet Radiation, Venus Clouds, Data Reduction, Midlatitude Atmosphere, Photointerpretation, Wave Propagation, Zonal Flow (Meteorology)

Scientific paper

Detailed descriptions and interpretations are provided for phenomena seen in the UV markings on Venus during the Mariner 10 encounter with that planet. The phenomena include the dark horizontal Y, circumequatorial belts, bowlike waves, the subsolar disturbance, midlatitude spiral streaks, the polar ring, and the polar region. Interpreting some of these phenomena in terms of physical processes that are familiar in earth's atmosphere, it is proposed that the large-scale brightness distribution can be most simply described in terms of a pattern with zonal wavenumber of unity which extends between about + and - 50 deg latitude and which progresses around the planet in about 4.2 days. The large-scale UV markings are interpreted as a wave phenomenon, and it is shown how the observed Y pattern could be produced by the superposition of a Rossby-Haurwitz wave dominant at middle latitudes and a Kelvin wave dominant near the equator. It is suggested that the bowlike waves may be true bow waves formed by the interaction of the rapid supercritical zonal flow with internal gravity waves of lower horizontal phase speeds generated by the subsolar disturbance.

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