Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Click Me!

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Originally published in Science Express on 30 May 2002
Science 5 July 2002:
Vol. 297. no. 5578, pp. 78 - 81
DOI: 10.1126/science.1073616
Prev | Table of Contents | Next

Reports

Maps of Subsurface Hydrogen from the High Energy Neutron Detector, Mars Odyssey

I. Mitrofanov,1 D. Anfimov,1 A. Kozyrev,1 M. Litvak,1 A. Sanin,1 V. Tret'yakov,1 A. Krylov,2 V. Shvetsov,2 W. Boynton,3 C. Shinohara,3 D. Hamara,3 R. S. Saunders4

After 55 days of mapping by the High Energy Neutron Detector onboard Mars Odyssey, we found deficits of high-energy neutrons in the southern highlands and northern lowlands of Mars. These deficits indicate that hydrogen is concentrated in the subsurface. Modeling suggests that water ice-rich layers that are tens of centimeters in thickness provide one possible fit to the data.

1 Institute for Space Research, Moscow 117997, Russia.
2 Joint Institute for Nuclear Research, Dubna 141980, Russia.
3 University of Arizona, Tucson, AZ 85721, USA.
4 Jet Propulsion Laboratory, Pasadena, CA 91109, USA.

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Water at the Poles and in Permafrost Regions of Mars.
P. R. Christensen (2006)
Elements 2, 151-155
   Abstract »    Full Text »    PDF »
Dry granular flows can generate surface features resembling those seen in Martian gullies.
T. Shinbrot, N.-H. Duong, L. Kwan, and M. M. Alvarez (2004)
PNAS 101, 8542-8546
   Abstract »    Full Text »    PDF »
CO2 Snow Depth and Subsurface Water-Ice Abundance in the Northern Hemisphere of Mars.
I. G. Mitrofanov, M. T. Zuber, M. L. Litvak, W. V. Boynton, D. E. Smith, D. Drake, D. Hamara, A. S. Kozyrev, A. B. Sanin, C. Shinohara, et al. (2003)
Science 300, 2081-2084
   Abstract »    Full Text »    PDF »
Global Distribution of Neutrons from Mars: Results from Mars Odyssey.
W. C. Feldman, W. V. Boynton, R. L. Tokar, T. H. Prettyman, O. Gasnault, S. W. Squyres, R. C. Elphic, D. J. Lawrence, S. L. Lawson, S. Maurice, et al. (2002)
Science 297, 75-78
   Abstract »    Full Text »    PDF »
Distribution of Hydrogen in the Near Surface of Mars: Evidence for Subsurface Ice Deposits.
W. V. Boynton, W. C. Feldman, S. W. Squyres, T. H. Prettyman, J. Bruckner, L. G. Evans, R. C. Reedy, R. Starr, J. R. Arnold, D. M. Drake, et al. (2002)
Science 297, 81-85
   Abstract »    Full Text »    PDF »


ADVERTISEMENT
Click Me!

ADVERTISEMENT

To Advertise     Find Products