Venus mesosphere and thermosphere. II - Global circulation, temperature, and density variations

Details Venus mesosphere and thermosphere. II - Global circulation, temperature, and density variations Venus mesosphere and thermosphere. II - Global circulation, temperature, and density variations

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...68..284b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 68, Nov. 1986, p. 284-312.

Computer Science

40

Atmospheric Circulation, Atmospheric Models, Mesosphere, Thermosphere, Venus Atmosphere, Atmospheric Density, Atmospheric Temperature, Diurnal Variations, Pioneer Venus Spacecraft, Two Dimensional Models, Wind Profiles, Venus, Mesosphere, Thermosphere, Circulation, Temperature, Atmosphere, Density, Structure, Eddy Diffusion, Conduction, Models, Pvo Mission, Diurnal Variations, Cooling, Comparisons, Spacecraft Observations, Drag, Mixing, Carbon Dioxide, Calculations, Parameters, Infrared, Ultraviolet, Wavele

Scientific paper

The Dickinson and Ridley (1977) symmetric, two-dimensional hydrodynamical model framework is presently used as the basis of a reexamination of the circulation and structure of the Venus thermosphere recently revealed by Pioneer Venus observations. The observed day-to-night variation of composition and temperatures can largely be derived by a wave-drag parameterization yielding a weaker circulation system than that predicted prior to Pioneer Venus. It is also suggested that eddy diffusion is a minor contributor to the maintenance of observed day and nightside densities, and that eddy coefficients are smaller than than those of one-dimensional composition models previously employed.

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