Greenhouse models of Venus' high surface temperature, as constrained by Pioneer Venus measurements

Details Greenhouse models of Venus' high surface temperature, as constrained by Pioneer Venus measurements Greenhouse models of Venus' high surface temperature, as constrained by Pioneer Venus measurements

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.8223p&link_type=abstract

Journal of Geophysical Research, vol. 85, Dec. 30, 1980, p. 8223-8231.

Physics

28

Venus, Greenhouse Effect, Surface, Temperature, Pvm Mission, Flux, Spacecraft Observations, Opacity, Atmosphere, Carbon Dioxide, Particles, Infrared, Water, Sulfur Dioxide, Clouds, Mixing Ratios, Structure, Wavelengths, Heating, Convection, Comparisons, Models, Simulations

Scientific paper

Recent measurements conducted from the Pioneer Venus probes and orbiter have provided a significantly improved definition of the solar net flux profile, the gaseous composition, temperature structure, and cloud properties of Venus' lower atmosphere. Using these data, we have carried out a series of one-dimensional radiative-convective equilibrium calculations to determine the viability of the greenhouse model of Venus' high surface temperature and to assess the chief contributors to the greenhouse effect. New sources of infrared opacity include the permitted transitions of SO2, CO, and HCl as well as opacity due to several pressure-induced transitions of CO2. We find that the observed surface temperature and lapse rate structure of the lower atmosphere can be reproduced quite closely with a greenhouse model that contains the water vapor abundance reported by the Venera spectrophotometer experiment. Thus the greenhouse effect can account for essentially all of Venus' high surface temperature. The prime sources of infrared opacity are, in order of importance, CO2, H2O, cloud particles, and SO2, with CO and HCl playing very minor roles.

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