Mariner 9 observations of the south polar CAP of Mars - Evidence for residual CO2 frost

Details Mariner 9 observations of the south polar CAP of Mars - Evidence for residual CO2 frost Mariner 9 observations of the south polar CAP of Mars - Evidence for residual CO2 frost

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1319p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 10, 1990, p. 1319-1335. Research supported by NASA.

Physics

35

Carbon Dioxide, Mariner 9 Space Probe, Mars Atmosphere, Mars Surface, Polar Caps, Brightness Temperature, Phase Transformations, Planetary Meteorology, Satellite Imagery, Mars, Mariner 9 Mission, Spacecraft Observations, Polar Regions, Size, Polar Caps, Carbon Dioxide, Frost, Orbiters, Viking Missions, Gases, Comparisons, Infrared, Wavelengths, Spectrometry, Spectra, Models, Temperature, Interferometry, Iris Instrument, Imagery, Photographs, Maps, Albedo, Thermal Emissions, Calculations, Brightness Temperat

Scientific paper

The first spacecraft observations of the south residual polar cap of Mars were obtained by the Mariner 9 orbiter during the Martian southern summer season, 1971-1972. Analyses of Viking orbiter observations obtained 3 Mars years later have shown that residual carbon dioxide frost was present at the south polar cap in 1977. In this study, Mariner 9 infrared interferometer spectrometer spectra and television camera images are used in conjuction with multispectral thermal emission models to constrain the temperatures of dark bare ground and bright frost regions within the south residual cap. The results provide strong evidence that carbon dioxide frost was present throughout the summer season despite the fact that the residual frost deposits observed by Mariner 9 were less extensive than those observed by Viking.

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