Solar heating of the Martian dusty atmosphere

Details Solar heating of the Martian dusty atmosphere Solar heating of the Martian dusty atmosphere

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978icar...35..196z&link_type=abstract

Icarus, vol. 35, Aug. 1978, p. 196-208.

Physics

Optics

3

Atmospheric Heating, Dust Storms, Mars Atmosphere, Solar Heating, Albedo, Atmospheric Optics, Optical Thickness, Radiative Transfer, Refractivity

Scientific paper

This paper examines the solar heating of the Martian atmosphere during the 1971 global dust storm observed by Mariner 9. Radiative scattering as well as absorption is included by utilizing the delta-Eddington approximation to the full radiative transfer equation. The necessary optical parameters are generated by a Mie program which uses a size distribution and a complex refractive index inferred from a number of sources, particularly from recent analyses of Mariner 9 UVS and TV observations. When uniform mixing of the dust is assumed, the solar heating per unit mass during a Martian global dust storm is remarkably uniform with height for small solar zenith angles. Heating rates may reach 80 K/day for overhead sunlight. Overall, 20% of the direct insolation is absorbed by the dust-laden atmosphere. Even optically thin widespread dust hazes may produce heating rates of several degrees Kelvin per day.

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