Global distribution of near-surface hydrogen on Mars

W. C. Feldman, T. H. Prettyman, S. Maurice, J. J. Plaut, D. L. Bish, D. T. Vaniman, M. T. Mellon, A. E. Metzger, S. W. Squyres, S. Karunatillake, William V. Boynton, R. C. Elphic, H. O. Funsten, D. J. Lawrence, R. L. Tokar

Research output: Contribution to journalArticle

317 Citations (Scopus)

Abstract

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 4-50°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 2 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.

Original languageEnglish (US)
JournalJournal of Geophysical Research: Space Physics
Volume109
Issue number9
DOIs
StatePublished - Sep 25 2004

Fingerprint

mars
Mars
Hydrogen
hydrogen
Water
Deposits
regolith
water
deposits
2001 Mars Odyssey
Neutrons
Neutron spectrometers
neutrons
neutron spectrometers
equatorial regions
fast neutrons
soils
Orbits
soil surface
spectrometer

Keywords

  • Composition
  • Glaciation
  • Mars

ASJC Scopus subject areas

  • Oceanography
  • Astronomy and Astrophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geophysics
  • Geochemistry and Petrology

Cite this

Feldman, W. C., Prettyman, T. H., Maurice, S., Plaut, J. J., Bish, D. L., Vaniman, D. T., ... Tokar, R. L. (2004). Global distribution of near-surface hydrogen on Mars. Journal of Geophysical Research: Space Physics, 109(9). https://doi.org/10.1029/2003JE002160

Global distribution of near-surface hydrogen on Mars. / Feldman, W. C.; Prettyman, T. H.; Maurice, S.; Plaut, J. J.; Bish, D. L.; Vaniman, D. T.; Mellon, M. T.; Metzger, A. E.; Squyres, S. W.; Karunatillake, S.; Boynton, William V.; Elphic, R. C.; Funsten, H. O.; Lawrence, D. J.; Tokar, R. L.

In: Journal of Geophysical Research: Space Physics, Vol. 109, No. 9, 25.09.2004.

Research output: Contribution to journalArticle

Feldman, WC, Prettyman, TH, Maurice, S, Plaut, JJ, Bish, DL, Vaniman, DT, Mellon, MT, Metzger, AE, Squyres, SW, Karunatillake, S, Boynton, WV, Elphic, RC, Funsten, HO, Lawrence, DJ & Tokar, RL 2004, 'Global distribution of near-surface hydrogen on Mars', Journal of Geophysical Research: Space Physics, vol. 109, no. 9. https://doi.org/10.1029/2003JE002160
Feldman WC, Prettyman TH, Maurice S, Plaut JJ, Bish DL, Vaniman DT et al. Global distribution of near-surface hydrogen on Mars. Journal of Geophysical Research: Space Physics. 2004 Sep 25;109(9). https://doi.org/10.1029/2003JE002160
Feldman, W. C. ; Prettyman, T. H. ; Maurice, S. ; Plaut, J. J. ; Bish, D. L. ; Vaniman, D. T. ; Mellon, M. T. ; Metzger, A. E. ; Squyres, S. W. ; Karunatillake, S. ; Boynton, William V. ; Elphic, R. C. ; Funsten, H. O. ; Lawrence, D. J. ; Tokar, R. L. / Global distribution of near-surface hydrogen on Mars. In: Journal of Geophysical Research: Space Physics. 2004 ; Vol. 109, No. 9.
@article{2a10fe4570d2401eadceafc78c4b6c30,
title = "Global distribution of near-surface hydrogen on Mars",
abstract = "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 4-50°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 2 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.",
keywords = "Composition, Glaciation, Mars",
author = "Feldman, {W. C.} and Prettyman, {T. H.} and S. Maurice and Plaut, {J. J.} and Bish, {D. L.} and Vaniman, {D. T.} and Mellon, {M. T.} and Metzger, {A. E.} and Squyres, {S. W.} and S. Karunatillake and Boynton, {William V.} and Elphic, {R. C.} and Funsten, {H. O.} and Lawrence, {D. J.} and Tokar, {R. L.}",
year = "2004",
month = "9",
day = "25",
doi = "10.1029/2003JE002160",
language = "English (US)",
volume = "109",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9380",
publisher = "Wiley-Blackwell",
number = "9",

}

TY - JOUR

T1 - Global distribution of near-surface hydrogen on Mars

AU - Feldman, W. C.

AU - Prettyman, T. H.

AU - Maurice, S.

AU - Plaut, J. J.

AU - Bish, D. L.

AU - Vaniman, D. T.

AU - Mellon, M. T.

AU - Metzger, A. E.

AU - Squyres, S. W.

AU - Karunatillake, S.

AU - Boynton, William V.

AU - Elphic, R. C.

AU - Funsten, H. O.

AU - Lawrence, D. J.

AU - Tokar, R. L.

PY - 2004/9/25

Y1 - 2004/9/25

N2 - 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 4-50°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 2 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.

AB - 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 4-50°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 2 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.

KW - Composition

KW - Glaciation

KW - Mars

UR - http://www.scopus.com/inward/record.url?scp=19944402172&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=19944402172&partnerID=8YFLogxK

U2 - 10.1029/2003JE002160

DO - 10.1029/2003JE002160

M3 - Article

AN - SCOPUS:19944402172

VL - 109

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9380

IS - 9

ER -