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Subsurface water oceans on icy satellites: Chemical composition and exchange processes

Sohl, F. and Choukroun, M. and Kargel, J. and Kimura, J. and Pappalardo, R. and Vance, S. and Zolotov, M. (2010) Subsurface water oceans on icy satellites: Chemical composition and exchange processes. Space Science Reviews, 153 (1-4), pp. 485-510. Springer. DOI: 10.1007/s11214-010-9646-y.

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The state of knowledge about the structure and composition of icy satellite interiors has been significantly extended by combining direct measurements from spacecraft, laboratory experiments, and theoretical modeling. The existence of potentially habitable liquid water reservoirs on icy satellites is dependent on the radiogenic heating of the rock component, additional contributions such as the dissipation of tidal energy, the efficiency of heat transfer to the surface, and the presence of substances that deplete the freezing point of liquid water. This review summarizes the chemical evolution of subsurface liquid water oceans, taking into account a number of chemical processes occurring in aqueous environments and partly related to material exchange with the deep interior. Of interest are processes occurring at the transitions from the liquid water layer to the ice layers above and below, involving the possible formation of clathrate hydrates and high-pressure ices on large icy satellites. In contrast, water-rock exchange is important for the chemical evolution of the liquid water layer if the latter is in contact with ocean floor rock on small satellites. The composition of oceanic floor deposits depends on ambient physical conditions and ocean chemistry, and their evolutions through time. In turn, physical properties of the ocean floor affect the circulation of oceanic water and related thermal effects due to tidally-induced porous flow and aqueous alteration of ocean floor rock.

Document Type:Article
Title:Subsurface water oceans on icy satellites: Chemical composition and exchange processes
AuthorsInstitution or Email of Authors
Sohl, F.frank.sohl@dlr.de
Choukroun, M.mathieu.choukroun@jpl.nasa.gov
Kargel, J.kargel@hwr.arizona.edu
Kimura, J.junkim@ep.sci.hokudai.ac.jp
Pappalardo, R.robert.pappalardo@jpl.nasa.gov
Vance, S.svance@jpl.nasa.gov
Zolotov, M.zolotov@asu.edu
Date:June 2010
Journal or Publication Title:Space Science Reviews
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 485-510
Keywords:Outer solar system, water oceans, oceanic composition, chemical evolution, organic compounds, high-pressure ices, clathrate hydrates, hydrothermal activity, porous rock, serpentinization, Europa, Ganymede, Callisto, Titan, Enceladus
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 > Planetary Physics
Deposited By: Frank Sohl
Deposited On:02 Nov 2010 10:45
Last Modified:07 Feb 2013 20:44

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