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Evidence for enhanced hydration on the northern flank of Olympus Mons, Mars

Bellucci, G. and Helbert, J. and Altieri, F. and Reiss, D. and Bibring, J.P. and van Gasselt, S. and Hoffmann, H. and Langevin, Y. and Neukum, G. and Poulet, F. (2007) Evidence for enhanced hydration on the northern flank of Olympus Mons, Mars. Icarus: International Journal of Solar System Studies, 2, pp. 361-377. Elsevier. DOI: 10.1016/j.icarus.2007.07.019.

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Abstract

In this paper we report about a small region on the northern scarp of Olympus Mons showing an increase of the 3 μm hydration band in the OMEGA spectra, together with low superficial temperatures. Although water ice clouds can occurs on the flank of big martian volcanoes, radiative transfer modeling indicates that atmospheric water ice alone cannot justify the shape of the observed band. A fit of the 1.9–3 μm absorption features is obtained by hypothesizing that the study region consists of a mixture of dust and water ice covered by an optically thin (τ=0.08 at 3 μm) layer of dust. Thermal modeling also suggests that water ice in this region may be stable during most of the martian year due to the saturation of the atmosphere. If water ice is responsible for the observed spectral behavior, it might consist of a number of ice or snow patches possibly deposited in small depressions.

Document Type:Article
Title:Evidence for enhanced hydration on the northern flank of Olympus Mons, Mars
Authors:
AuthorsInstitution or Email of Authors
Bellucci, G.Istituto Nazionale di Astrofisica—Istituto Fisica Spazio Interplanetario (IFSI), Rome, Italy
Helbert, J.UNSPECIFIED
Altieri, F.Istituto Nazionale di Astrofisica—Istituto Fisica Spazio Interplanetario (IFSI), Rome, Italy
Reiss, D.Institut für Planetologie, Westfälische Wilhelms-Universität Münster, Münster, Germany
Bibring, J.P.Institut d'Astrophysique Spatiale (IAS), Université Paris Sud, Orsay Cedex, France
van Gasselt, S.Freie Universität Berlin, Department of Earth Sciences, Institute of Geosciences, Planetology and Remote Sensing, Berlin, Germany
Hoffmann, H.UNSPECIFIED
Langevin, Y.Institut d'Astrophysique Spatiale (IAS), Université Paris Sud, Orsay Cedex, France
Neukum, G.Freie Universität Berlin, Department of Earth Sciences, Institute of Geosciences, Planetology and Remote Sensing, Berlin, Germany
Poulet, F.Institut d'Astrophysique Spatiale (IAS), Université Paris Sud, Orsay Cedex, France
Date:15 December 2007
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:2
DOI:10.1016/j.icarus.2007.07.019
Page Range:pp. 361-377
Publisher:Elsevier
Series Name:192
Status:Published
Keywords:Spectroscopy; Mars; Mineralogy; Ices
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt MARS-EXPRESS / HRSC (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Stefanie Hempel
Deposited On:15 Jan 2008
Last Modified:27 Apr 2009 14:36

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