Grs Measurements Of Ar In Mars' Atmosphere

Details Grs Measurements Of Ar In Mars' Atmosphere Grs Measurements Of Ar In Mars' Atmosphere

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.7307s&link_type=abstract

American Astronomical Society, DPS meeting #38, #73.07

Astronomy and Astrophysics

Astronomy

Scientific paper

The Gamma Ray Spectrometer (GRS) on Mars Odyssey has completed measurements of Ar in Mars' atmosphere for a second Mars year. New meridional mixing efficiencies have been computed for some seasons at high latitudes and augment those previously published [1]. Results will be presented. Mid-latitude data show no significant departures from an average homogeneous model using the Viking Lander 2 Ar measurement as a standard. High latitude data show variations between Mars year 1 and 2. These differences will be discussed.
References: [1] Sprague et al (2004) Mars' South Polar Ar Enhancement: A Tracer for South Polar Seasonal Meridional Mixing, Science, 306, 1364 - 1367.
Acknowledgements: We thank all the members of the GRS team for years of dedicated efforts. We also especially thank Bob Haberle and Jim Murphy who provided the GCM used for the analysis and many useful conversations. The GRS and its scientists are supported through NASA contract 1228726.

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