Details

Autor(en) / Beteiligte

• Boynton, W. V.
• Feldman, W. C.
• Squyres, S. W.
• Prettyman, T. H.
• Brückner, J.
• Evans, L. G.
• Reedy, R. C.
• Starr, R.
• Arnold, J. R.
• Drake, D. M.
• Englert, P. A. J.
• Metzger, A. E.
• Mitrofanov, Igor
• Trombka, J. I.
• d'Uston, C.
• Wänke, H.
• Gasnault, O.
• Hamara, D. K.
• Janes, D. M.
• Marcialis, R. L.
• Maurice, S.
• Mikheeva, I.
• Taylor, G. J.
• Tokar, R.
• Shinohara, C.

Titel

Distribution of Hydrogen in the near Surface of Mars: Evidence for Subsurface Ice Deposits

Ist Teil von

• Science (American Association for the Advancement of Science), 2002-07, Vol.297 (5578), p.81-85

Ort / Verlag

United States: American Society for the Advancement of Science

Erscheinungsjahr

2002

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Using the Gamma-Ray Spectrometer on the Mars Odyssey, we have identified two regions near the poles that are enriched in hydrogen. The data indicate the presence of a subsurface layer enriched in hydrogen overlain by a hydrogen-poor layer. The thickness of the upper layer decreases with decreasing distance to the pole, ranging from a column density of about 150 grams per square centimeter at -42° latitude to about 40 grams per square centimeter at -77°. The hydrogen-rich regions correlate with regions of predicted ice stability. We suggest that the host of the hydrogen in the subsurface layer is ice, which constitutes 35 ± 15% of the layer by weight.