Revision of MAWD observations: seasonal behavior of Mars atmospheric water vapor, comparison MAWD and TES observations

Details Revision of MAWD observations: seasonal behavior of Mars atmospheric water vapor, comparison MAWD and TES observations Revision of MAWD observations: seasonal behavior of Mars atmospheric water vapor, comparison MAWD and TES observations

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....13099f&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #13099

Physics

Scientific paper

Key information about the annual Martian atmospheric water cycle has been received from Viking MAWD experiment and recently from TES/MGC observations. However, these datasets show remarkable disagreement, especially in the perihelion season near the South Pole. Most prominent difference occured in the periods of major dust storms, which take place during both Viking and MGS missions. We considered the influence of aerosol scattering on the retrieval of water vapor from the 1.38 micron absorption band under various observation geometry. Water vapor retrievals from the calibrated of MAWD data have been carried out for one Martian year taking into account the aerosol multiple scattering. The resulting seasonal evolution of atmospheric water retrieved from MAWD data is consistent with recent TES results. This implies the stability of the Martian seasonal water cycle within the accuracy of nadir observations. Mapping water vapor from available MAWD observations reveals seasonally evolving zonal structure, which is consistent with TES results and GCM simulations.

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