Infrared Absorptions near Three Microns Recorded over the Polar Cap of Mars

Details Infrared Absorptions near Three Microns Recorded over the Polar Cap of Mars Infrared Absorptions near Three Microns Recorded over the Polar Cap of Mars

Oct 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969sci...166..496h&link_type=abstract

Science, Volume 166, Issue 3904, pp. 496-499

Physics

20

Scientific paper

During the Mariner 7 flyby of Mars, the infrared spectrometer recorded distinct, sharp absorptions near 3020 and 3300 reciprocal centimeters between 61 degrees S and 80 degrees S, at the edge of the southern polar cap, with maximum optical density near 68 degrees S and 341 degrees E. These bands, which match in frequency the v3 bands of methane and ammonia, can be associated with previously unreported spectral features of solid carbon dioxide exceeding 1 millimeter in thickness. Possible reasons for the geographic localization are discussed.

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