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Observations of water vapour anomaly above Tharsis volcanos on Mars in the ISM (Phobos-2) experiment.

Titov, D.V.(1) and Moroz, V.I.(1) and Grigoriev, A.V.(1) and Rosenquist, J.(2) and Combes, M.(2) and Bibring, J.-P.(3) and Arnold, G. (1994) Observations of water vapour anomaly above Tharsis volcanos on Mars in the ISM (Phobos-2) experiment. Planetary and Space Science, 42, pp. 1001-1010. Elsevier, Oxford, U.K..

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Observations of Mars with the infrared imaging spectrometer ISM on board the Phobos-2 spacecraft provided more than 40,000 spectra in the wavelength range 0.7 - 3.2 muem with a spatial resolution of about 20 km. These spectra bear features of both atmospheric and surface origin. Measurements in the water vapour bands near 1.9 and 2.6 muem along the flanks of huge Martian volcanos provided the data on the H2O spatial variations above them. The retrieved mixing ratio was about 200 ppm above the volcanos, which was about a factor of five higher than that found above the surrounding terrains. The origin of the observed water vapour anomaly is likely to be connectedto the volcanos and could be explained by the regolith-atmosphere water vapour exchange. On the basis of a new theoretical approach to the process of diffusion of adsorbed water from the regolith to the atmosphere, a model of the observed anomaly was proposed. It implies an intensive vapour desorption during the day hours from the volcanic regolith which was assumed to be different in composition from that of surrounding highlands.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1995,
Title:Observations of water vapour anomaly above Tharsis volcanos on Mars in the ISM (Phobos-2) experiment.
AuthorsInstitution or Email of Authors
Grigoriev, A.V.(1)UNSPECIFIED
Rosenquist, J.(2)UNSPECIFIED
Bibring, J.-P.(3)UNSPECIFIED
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 1001-1010
Publisher:Elsevier, Oxford, U.K.
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Institut für Planetenerkundung
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 09:48

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