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

Autor:	P. Englert, R. D. Starr, Claude d’Uston, Albert E. Metzger, Robert L. Marcialis, Thomas H. Prettyman, C. Shinohara, R. C. Reedy, Heinrich Wänke, Sylvestre Maurice, Jacob I. Trombka, S. W. Squyres, James R. Arnold, Olivier Gasnault, William V. Boynton, D. K. Hamara, I. G. Mitrofanov, J. Brückner, G. J. Taylor, D. M. Drake, Daniel M. Janes, Larry G. Evans, W. C. Feldman, R. L. Tokar, I. Mikheeva
Rok vydání:	2002
Předmět:	Atmosphere Multidisciplinary Hydrogen chemistry Square Centimeter Water on Mars Dry ice chemistry.chemical_element Mineralogy Mars Exploration Program Layer (electronics) Geology Latitude
Zdroj:	Science. 297:81-85
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.1073722
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3b43c4afb1660293f0b0240a17f327fb https://doi.org/10.1126/science.1073722 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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