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Seepages and the astrobiological potential of polar dunes on Mars

Kereszturi, A. and Möhlmann, D. and Berczi, Sz. and Ganti, T. and Horvath, A. and Kuti, A. and Sik, A. (2010) Seepages and the astrobiological potential of polar dunes on Mars. In: Astrobiology: Physical Origin, Biological Evolution and Spatial Distribution Space Science, Exploration and Policies. Nova Science Publishers. pp. 97-113. ISBN 978-1-60741-290-8.

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Abstract

At the polar dunes of Mars branching dark slope streaks emanate from Dark Dune Spots were observed in local springtime on MOC and HiRISE image. They seep downward with speed of 1.4 meter/sol when the temperature of the terrain on 3 km spatial resolution is between 180 and 250 K. Theoretical considerations and calculations suggest interfacial liquid-like water have to be present on the Mars, and probably cause the observed seepage features. The thin water lubricated grains may slide over each other, and/or the stress caused by the refreezing of this interfacial wate could also produce such markings, as well as the moving front of solid ice/liquid water phase changes. Such ephemerally wet environment between the dune grains may have astrobiological significance.

Document Type:Book Section
Title:Seepages and the astrobiological potential of polar dunes on Mars
Authors:
AuthorsInstitution or Email of Authors
Kereszturi, A.Collegium Budapest Institute for Advanced Study, Budapest, Hungary; Eotvos Lorand University of Sciences, Institute of Geography and Earth Sciences, Budapest, Hungary
Möhlmann, D.dirk.moehlmann@dlr.de
Berczi, Sz.Collegium Budapest Institute for Advanced Study, Budapest, Hungary; Eotvos Lorand University of Sciences, Institute of Geography and Earth Sciences, Budapest, Hungary
Ganti, T.Collegium Budapest Institute for Advanced Study, Budapest, Hungary
Horvath, A.Collegium Budapest Institute for Advanced Study, Budapest, Hungary; Eotvos Lorand University of Sciences, Institute of Geography and Earth Sciences, Budapest, Hungary; Konkoly Observatory, Budapest, Hungary
Kuti, A.Eotvos Lorand University of Sciences, Department of Astronomy, Budapest, Hungary
Sik, A.Collegium Budapest Institute for Advanced Study, Budapest, Hungary
Date:2010
Journal or Publication Title:Astrobiology: Physical Origin, Biological Evolution and Spatial Distribution
Page Range:pp. 97-113
Editors:
EditorsEmail
Hegedüs, SimonUNSPECIFIED
Csonka, JakobUNSPECIFIED
Publisher:Nova Science Publishers
Series Name:Space Science, Exploration and Policies
ISBN:978-1-60741-290-8
Status:Published
Keywords:Mars, polar dunes, water, dark dune spots
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 - Vorhaben Vergleichende Planetologie (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Susanne Pieth
Deposited On:12 Oct 2010 13:54
Last Modified:12 Oct 2010 13:54

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