Statistics – Computation
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.5483p&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, June 20, 1983, p. 5483-5493.
Statistics
Computation
4
Atmospheric Temperature, Dust Storms, Mars Atmosphere, Planetary Boundary Layer, Planetary Temperature, Radiative Heat Transfer, Atmospheric Heating, Computerized Simulation, Convective Heat Transfer, Diurnal Variations, Infrared Absorption, Infrared Spectra, Mariner 9 Space Probe, Mars Surface
Scientific paper
A computational simulation, based on Mariner 9 data, was performed for the thermal characteristics of the Martian atmospheric surface boundary layer in clear and dust-filled conditions. A radiative transfer model consisting of the atmospheric enthalpy rate equation, the radiative flux integrated over the 0.2-50 microns, the solid angle interval, and 0.50 km altitudes, broken into 52 levels. Mariner 9 IR data for CO2 absorption lines were included in the form of a temperture-dependent equation, while the line-widths were interpreted in terms of the pressure dependene as well as temperature. The lines covered the regions from 1-50 microns and varying conditions of dust content in the atmosphere. Attention was given to the thermal coupling between the ground and the atmosphere. It was found that convective heat exchange develops quickly due to radiative heating of the Martian desert surface, but does not cool the surface because of the attenuated atmosphere. The model predictd the 100 K temperature variations in the dusty atmosphere, as observed by the Viking thermal mapper. It is suggested that radiative flux convergence is as important as convection at equivalent efficiencies.
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