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

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

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sci...297...81b&link_type=abstract

Science, Volume 297, Issue 5578, pp. 81-85 (2002).

Physics

429

Scientific paper

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.

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