Global distribution of near‐surface hydrogen on Mars

DOI Web Site Web Site 被引用文献6件
  • W. C. Feldman
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • T. H. Prettyman
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • S. Maurice
    Observatoire Midi‐Pyrenees Toulouse France
  • J. J. Plaut
    Jet Propulsion Laboratory Pasadena California USA
  • D. L. Bish
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • D. T. Vaniman
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • M. T. Mellon
    Laboratory for Atmospheric and Space Physics University of Colorado Boulder Colorado USA
  • A. E. Metzger
    Jet Propulsion Laboratory Pasadena California USA
  • S. W. Squyres
    Center for Radiophysics and Space Research Cornell University Ithaca New York USA
  • S. Karunatillake
    Center for Radiophysics and Space Research Cornell University Ithaca New York USA
  • W. V. Boynton
    Department of Planetary Sciences University of Arizona Tucson Arizona USA
  • R. C. Elphic
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • H. O. Funsten
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • D. J. Lawrence
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • R. L. Tokar
    Los Alamos National Laboratory Los Alamos New Mexico USA

抄録

<jats:p>Neutron data observed using the Neutron Spectrometer aboard 2001 Mars Odyssey provide a lower limit to the global inventory of Martian water‐equivalent hydrogen. Hydrogen‐rich deposits ranging between about 20% and 100% water‐equivalent by mass are found poleward of ±50° latitude, and less rich, but significant, deposits are found at near‐equatorial latitudes. The equatorial deposits between ±45° latitude range between 2% and 10% water‐equivalent hydrogen by mass and reach their maximum in two regions that straddle the 0‐km elevation contour. Higher water abundances, up to ∼11%, are required in subsurface regolith of some equatorial regions if the upper 10 g/cm<jats:sup>2</jats:sup>of regolith is desiccated, as suggested on average by comparison of epithermal and fast neutron data. The hydrogen contents of surface soils in the latitude range between 50° and 80° north and south are equal within data uncertainties. A lower‐limit estimate of the global inventory of near surface hydrogen amounts to a global water layer about 14 cm thick if the reservoir sampled from orbit is assumed to be 1 m thick.</jats:p>

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