Mapping Mars water vapor with the Very Large Array

Details Mapping Mars water vapor with the Very Large Array Mapping Mars water vapor with the Very Large Array

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar..100...48c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 100, no. 1, p. 48-59.

Astronomy and Astrophysics

Astronomy

51

Emission Spectra, Mars Atmosphere, Molecular Spectra, Radio Astronomy, Very Large Array (Vla), Water Vapor, Abundance, Atmospheric Temperature, Line Spectra, Microwave Spectra, Radiative Transfer

Scientific paper

This paper presents the first radio measurements of Mars atmospheric water, retrieved from interferometric spectral line observations with the NRAO VLA. Large atmospheric path lengths on the limb of Mars lead to an annulus of H2O line emission which provides a measure of the diurnal and latitudinal variability of atmospheric water on Mars. The measured line shapes of the observed H2O emission yield the first direct measurements of the vertical mixing profile of H2O in the Mars atmosphere. The observations indicate a very dry Mars atmosphere in which the globally averaged water column is approximately 3 pr micron.

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