Mars mesosphere and thermosphere. I - Global mean heat budget and thermal structure

Details Mars mesosphere and thermosphere. I - Global mean heat budget and thermal structure Mars mesosphere and thermosphere. I - Global mean heat budget and thermal structure

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.7325b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, July 1, 1988, p. 7325-7337. NSF-sponsored research.

Physics

32

Energy Budgets, Exosphere, Mars Atmosphere, Planetary Magnetospheres, Temperature Measurement, Thermosphere, Heat Sources, Mariner Program, Radiative Transfer, Solar Radiation, Ultraviolet Radiation

Scientific paper

Physical processes that influence Mars temperature are examined using a one-dimensional Mars model which was formulated by adapting the Venus radiative transfer code, described by Dickinson and Bougher (1986), to Mars inputs and parameters. Adjustable model parameters include an eddy diffusion coefficient for heat, the amount of atomic oxygen at 130 km, and the rate of CO2 15-micron cooling by collisional excitation via atomic O. It was found that the CO2 cooling is relatively less important for Mars thermal balance than it is in the case of Venus, due to the larger Mars scale heights, which shift maximum heating to lower pressures, where molecular thermal conduction is dominant, and also because the Mars atomic oxygen is depleted. The calculated Mars global mean energy balance resembles that of the earth more closely than that of Venus. It was found that realistic heat balance models for both Venus and Mars cannot be derived using identical parameters.

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