Physics
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jats...35..723a&link_type=abstract
Journal of the Atmospheric Sciences, vol. 35, Apr. 1978, p. 723-734.
Physics
18
Dust Storms, Ice Formation, Mariner 9 Space Probe, Mars Atmosphere, Spacecraft Television, Spectral Reflectance, Atmospheric Tides, Carbon Dioxide, Gravity Waves, Haze, Limbs
Scientific paper
Results are presented for a statistical analysis of over 3000 Mariner 9 television reflectance profiles of the planetary limb of Mars for the period from the decaying phase of a global dust storm (southern summer) to southern winter solstice. It is shown that during the decaying phase of the storm, the dust is maintained aloft to high elevations by vertical mixing primarily in the equatorial zone, apparently by the direct or indirect action of the diurnal tide; the result is that the dust decay is much faster in high-latitude regions than near the equator. Significant dust remains aloft in Martian equatorial regions long after the major dust storms have subsided. At the top of the dusty atmosphere, a region exists where temperatures relax toward values expected for a dust-free CO2 atmosphere; this is therefore a region of convective overturning topped by thin condensation hazes resembling terrestrial noctilucent clouds, thereby showing occasionally gravity wave structures.
Anderson Edward
Leovy Conway
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