Venus mesosphere and thermosphere temperature structure. I - Global mean radiative and conductive equilibrium

Details Venus mesosphere and thermosphere temperature structure. I - Global mean radiative and conductive equilibrium Venus mesosphere and thermosphere temperature structure. I - Global mean radiative and conductive equilibrium

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...27..479d&link_type=abstract

Icarus, vol. 27, Apr. 1976, p. 479-493.

Astronomy and Astrophysics

Astronomy

6

Atmospheric Heating, Mesosphere, Temperature Distribution, Thermosphere, Upper Atmosphere, Venus Atmosphere, Astronomical Models, Atmospheric Models, Atmospheric Temperature, Carbon Dioxide, Radiant Cooling, Solar Heating

Scientific paper

Theoretical foundations for calculating the global mean temperatures of the upper atmosphere of Venus are examined. A standard global mean model, which is essentially that proposed by Dickinson (1972) except for some modifications of the infrared calculations, is used to determine the temperature profile under the assumptions of pure CO2, a 30% EUV heating efficiency, and no eddy mixing. Three significant uncertainties in determining thermospheric temperatures are revealed: the efficiency of solar EUV in degrading to heat, the enhancement of vibrational excitation of CO2 by collision with O, and the possibility of eddy mixing. Model integrations with various parameterizations are discussed relative to changing EUV, O + CO2, and eddy mixing; sensitivity of calculated temperature profiles to the infrared cooling formalism; and global mean heating rates. Possible simplification (cooling to space and NLTE) is examined.

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