The Martian polar CAP - Radiative effects of ozone, clouds, and airborne dust

Details The Martian polar CAP - Radiative effects of ozone, clouds, and airborne dust The Martian polar CAP - Radiative effects of ozone, clouds, and airborne dust

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1367l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 10, 1990, p. 1367-1379. Research supported by the National Resea

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Energy Budgets, Mars Atmosphere, Ozone, Polar Caps, Radiant Flux Density, Atmospheric Models, Carbon Dioxide, Dust Storms, Ice Clouds, Mars, Polar Regions, Polar Caps, Ozone, Clouds, Dust, Atmosphere, Ice, Radiative Effects, Energy, Abundance, Absorption, Symmetry, Flux, Depth, Optical Properties, Seasonal Variations, Models, Procedure, Wavelengths, Surface, Opacity, Albedo, Temperature, Sublimation, Carbon Dioxide, Parameters

Scientific paper

The solar and thermal flux striking the polar cap of Mars is computed for various ozone, dust, and cloud abundances and for three solar zenith angles. Ozone does not significantly affect the total energy budget of the polar cap. Hence the observed hemispherical asymmetry in ozone abundance causes only an insignificant hemispherical asymmetry in the polar caps. Vertical optical depths of dust and cloud ranging from zero to 1 cause little change in the total flux absorbed by the polar cap near its edge but increase the absorbed flux significantly as one travels poleward. Hemispherical asymmetries in dust abundance, cloud cover, and surface pressure combine to cause a significant hemispherical asymmetry in the total flux absorbed by the residual polar caps, which helps to explain the dichotomy in the residual polar caps on Mars. Other processes which affect the energy budget of the polar cap are proposed and reviewed, particularly with respect to their interaction with the radiative effects of clouds and dust.

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