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.

Item URL in elib:

https://elib.dlr.de/62944/

Document Type:

Book Section

Title:

Seepages and the astrobiological potential of polar dunes on Mars

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD
Kereszturi, A.	Collegium Budapest Institute for Advanced Study, Budapest, Hungary; Eotvos Lorand University of Sciences, Institute of Geography and Earth Sciences, Budapest, Hungary	UNSPECIFIED
Möhlmann, D.	dirk.moehlmann (at) dlr.de	UNSPECIFIED
Berczi, Sz.	Collegium Budapest Institute for Advanced Study, Budapest, Hungary; Eotvos Lorand University of Sciences, Institute of Geography and Earth Sciences, Budapest, Hungary	UNSPECIFIED
Ganti, T.	Collegium Budapest Institute for Advanced Study, Budapest, Hungary	UNSPECIFIED
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	UNSPECIFIED
Kuti, A.	Eotvos Lorand University of Sciences, Department of Astronomy, Budapest, Hungary	UNSPECIFIED
Sik, A.	Collegium Budapest Institute for Advanced Study, Budapest, Hungary	UNSPECIFIED

Date:

2010

Journal or Publication Title:

Astrobiology: Physical Origin, Biological Evolution and Spatial Distribution

Open Access:

Gold Open Access:

In SCOPUS:

In ISI Web of Science:

Page Range:

pp. 97-113

Editors:

Editors	Email	Editor's ORCID iD
Hegedüs, Simon	UNSPECIFIED	UNSPECIFIED
Csonka, Jakob	UNSPECIFIED	UNSPECIFIED

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:

Pieth, Susanne

Deposited On:

12 Oct 2010 13:54

Last Modified:

12 Oct 2010 13:54

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