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Unfrozen subsurface water on Mars: presence and implications

Möhlmann, D.T.F. (2003) Unfrozen subsurface water on Mars: presence and implications. International Journal of Astrobiology, 2 (3), pp. 213-216.

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It has been concludet from measurements, recently made by Mars Odyssey experiments, that there is water in the upper few metres of the Martian surface at mid- and equatorial latitudes with regionally high contents of up to about 9 wt%. This Martian subsurface water is shown to be in the form of adsorption (or sorption) water. The adsorptive bond of water molecules is about twice as strong in mineral surfaces compared with on water ice. Therefore, evaporaton of adsorption water in porous soul happens on time scales, which exceed those of sublimation of water ice by orders of magnitude. Consequently, sorption water can have survived in the near-surface layers of the Martian soul at mid- and equatorial latitudes over geological time scales, where ice must have been lost by sublimation. Sorption water is unfrozen, u.e. liquid-like, down to temperatures of -40 °C and below. It must, at least regionally and temporarily, be an important and not a trace constituent of the upper-surface Martian soil. The presence of liquid-like sorption water on Mars is also discussed in view of exobiological implications.

Item URL in elib:https://elib.dlr.de/10936/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2004,
Title:Unfrozen subsurface water on Mars: presence and implications
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:International Journal of Astrobiology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 213-216
Keywords:adsorption water, hydrated minerals, liquid-like water, Martian subsurface water content, Martian surface chemistry, unfrozen water
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):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Pieth, Susanne
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 16:32

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