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.
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.
After 55 days of mapping by the High-Energy Neutron Detector onboard Mars Odyssey, we found deficits of high energy neutrons in southern highlands and the northern lowlands of Mars. The deficits of high energy neutrons indicates 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.
The editors suggest the following Related Resources on Science sites:
In Science Magazine
REPORTS
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, G. W. McKinney, K. R. Moore, and R. C. Reedy (5 July 2002) Science297 (5578), 75.
[DOI: 10.1126/science.1073541] |Abstract »|Full Text »|PDF »
REPORTS
W. V. Boynton, W. C. Feldman, S. W. Squyres, T. H. Prettyman, J. Brückner, L. G. Evans, R. C. Reedy, R. Starr, J. R. Arnold, D. M. Drake, P. A. J. Englert, A. E. Metzger, Igor Mitrofanov, J. I. Trombka, C. d'Uston, H. Wänke, O. Gasnault, D. K. Hamara, D. M. Janes, R. L. Marcialis, S. Maurice, I. Mikheeva, G. J. Taylor, R. Tokar, and C. Shinohara (5 July 2002) Science297 (5578), 81.
[DOI: 10.1126/science.1073722] |Abstract »|Full Text »|PDF »
PERSPECTIVES
Jim Bell (5 July 2002) Science297 (5578), 60.
[DOI: 10.1126/science.1074025] |Summary »|Full Text »|PDF »
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Water at the Poles and in Permafrost Regions of Mars.
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 »
