Results from the Mars global surveyor thermal emission spectrometer

Philip Christensen, D. L. Anderson, S. C. Chase, R. T. Clancy, R. N. Clark, B. J. Conrath, H. H. Kieffer, R. O. Kuzmin, M. C. Malin, J. C. Pearl, T. L. Roush, M. D. Smith

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154 Scopus citations

Abstract

The Thermal Emission Spectrometer spectra of low albedo surface materials suggests that a four to one mixture of pyroxene to plagioclase, together with about a 35 percent dust component provides the best fit to the spectrum. Qualitative upper limits can be placed on the concentration of carbonates (<10 percent), olivine (<10 percent), clay minerals (<20 percent), and quartz (<5 percent) in the limited regions observed. Limb observations in the northern hemisphere reveal low-lying dust hazes and detached water-ice clouds at altitudes up to 55 kilometers. At an aerocentric longitude of 224°a major dust storm developed in the Noachis Terra region. The south polar cap retreat was similar to that observed by Viking.

Original languageEnglish (US)
Pages (from-to)1692-1696
Number of pages5
JournalScience
Volume279
Issue number5357
DOIs
StatePublished - Mar 13 1998

ASJC Scopus subject areas

  • General

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