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6 - Volatiles on Mars: scientific results from the Mars Odyssey Neutron Spectrometer

from Part II - Elemental Composition: Orbital and in situ Surface Measurements

Published online by Cambridge University Press:  10 December 2009

By
W. C. Feldman ,
M. T. Mellon ,
O. Gasnault ,
S. Maurice  and
T. H. Prettyman
Edited by
Jim Bell
W. C. Feldman
Affiliation:
Los Alamos National Laboratory MS D466 Space & Atmospheric Science Los Alamos, NM 87545, USA
M. T. Mellon
Affiliation:
Laboratory for Atmospheric & Space Physics University of Colorado Boulder, CO 80309-0392, USA
O. Gasnault
Affiliation:
Laboratoire d'Astrophysique, 14 Avenue Belin Toulouse, 31400, France
S. Maurice
Affiliation:
Centre d'Etude Spatiale des Rayonnements, 9 Avenue du Colonel Roche BP 24346 Toulouse Cedex 4, France
T. H. Prettyman
Affiliation:
Los Alamos National Laboratory MS D466 Space and Atmospheric Science Los Alamos, NM 87545, USA
Jim Bell
Affiliation:
Cornell University, New York
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Summary

ABSTRACT

The Mars Odyssey Neutron Spectrometer (MONS) is described and its capabilities to detect and quantify deposits of H and CO2 ice within about 1 m of the surface are presented. After two Martian years in mapping orbit about Mars, two distinct domains of hydrogen deposits have been delimited. High-latitude domains in both hemispheres contain large, generally buried deposits of hydrogen and a near-equatorial domain contains more modest, yet significant, deposits. All observations are specified in units of water-equivalent hydrogen (WEH) and are compared with other observations of near-surface deposits of H2O and OH. They are also discussed in terms of theoretical models of volatile exchange between different water reservoirs through the atmosphere or through a system of aquifers. The CO2 ice cover of the residual cap near the South Pole is modeled and found not to be a significant part of the CO2 inventory of Mars.

Type
Chapter
Information
The Martian Surface
Composition, Mineralogy and Physical Properties
 , pp. 125 - 148
Publisher: Cambridge University Press
Print publication year: 2008

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  • Volatiles on Mars: scientific results from the Mars Odyssey Neutron Spectrometer
    • By W. C. Feldman, Los Alamos National Laboratory MS D466 Space & Atmospheric Science Los Alamos, NM 87545, USA, M. T. Mellon, Laboratory for Atmospheric & Space Physics University of Colorado Boulder, CO 80309-0392, USA, O. Gasnault, Laboratoire d'Astrophysique, 14 Avenue Belin Toulouse, 31400, France, S. Maurice, Centre d'Etude Spatiale des Rayonnements, 9 Avenue du Colonel Roche BP 24346 Toulouse Cedex 4, France, T. H. Prettyman, Los Alamos National Laboratory MS D466 Space and Atmospheric Science Los Alamos, NM 87545, USA
  • Edited by Jim Bell, Cornell University, New York
  • Book: The Martian Surface
  • Online publication: 10 December 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536076.007
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  • Volatiles on Mars: scientific results from the Mars Odyssey Neutron Spectrometer
    • By W. C. Feldman, Los Alamos National Laboratory MS D466 Space & Atmospheric Science Los Alamos, NM 87545, USA, M. T. Mellon, Laboratory for Atmospheric & Space Physics University of Colorado Boulder, CO 80309-0392, USA, O. Gasnault, Laboratoire d'Astrophysique, 14 Avenue Belin Toulouse, 31400, France, S. Maurice, Centre d'Etude Spatiale des Rayonnements, 9 Avenue du Colonel Roche BP 24346 Toulouse Cedex 4, France, T. H. Prettyman, Los Alamos National Laboratory MS D466 Space and Atmospheric Science Los Alamos, NM 87545, USA
  • Edited by Jim Bell, Cornell University, New York
  • Book: The Martian Surface
  • Online publication: 10 December 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536076.007
Available formats
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  • Volatiles on Mars: scientific results from the Mars Odyssey Neutron Spectrometer
    • By W. C. Feldman, Los Alamos National Laboratory MS D466 Space & Atmospheric Science Los Alamos, NM 87545, USA, M. T. Mellon, Laboratory for Atmospheric & Space Physics University of Colorado Boulder, CO 80309-0392, USA, O. Gasnault, Laboratoire d'Astrophysique, 14 Avenue Belin Toulouse, 31400, France, S. Maurice, Centre d'Etude Spatiale des Rayonnements, 9 Avenue du Colonel Roche BP 24346 Toulouse Cedex 4, France, T. H. Prettyman, Los Alamos National Laboratory MS D466 Space and Atmospheric Science Los Alamos, NM 87545, USA
  • Edited by Jim Bell, Cornell University, New York
  • Book: The Martian Surface
  • Online publication: 10 December 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536076.007
Available formats
×