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Distribution of hydrogen in the near surface of Mars: Evidence for subsurface ice deposits

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons100869

Brückner,  J.
Cosmochemistry, Max Planck Institute for Chemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons101354

Wänke,  H.
Cosmochemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Boynton, W. V., Feldman, W. C., Squyres, S. W., Prettyman, T. H., Brückner, J., Evans, L. G., et al. (2002). Distribution of hydrogen in the near surface of Mars: Evidence for subsurface ice deposits. Science, 297(5578), 81-85.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-90D6-4
Zusammenfassung
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 -42degrees latitude to about 40 grams per square centimeter at -77degrees. 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.