The upper atmosphere of Venus during morning conditions

Details The upper atmosphere of Venus during morning conditions The upper atmosphere of Venus during morning conditions

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.7829v&link_type=abstract

Journal of Geophysical Research, vol. 85, Dec. 30, 1980, p. 7829-7840. Bundesministerium für Forschung und Technologie

Physics

29

Venus, Atmosphere, Structure, Composition, Altitude, Pvm Mission, Mixing, Bnms Instrument, Exosphere, Temperature, Equipment, Diagrams, Models, Calculations, Eddy Diffusion, Photochemistry, Energy, Solar Radiation

Scientific paper

The structure and composition of the Venus upper atmosphere between 130- and 650-km altitude were measured for a solar zenith angle of approximately 60 deg by the neutral gas mass spectrometer on board the Pioneer Venus multiprobe bus. Below 180 km a wavelike structure is quite evident in the CO2 and He number density profiles. For altitudes above 100 km a one-dimensional model of the Venus upper atmosphere during morningside conditions (MS model) is presented. Number densities at 150-km altitude are as follows: CO2 equals 4.2 x 10 to the 9th, N2 equals 1.1 x 10 to the 9th, CO equals 2.8 x 10 to the 9th, and He equals 4.8 x 10 to the 6th per cu cm. The homopause altitudes for N2 and He are at 136 and 130 km, respectively.

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