火星近地表氢的分布：地下冰沉积物的证据。
Distribution of hydrogen in the near surface of Mars: evidence for subsurface ice deposits.
作者信息
Boynton W V, Feldman W C, Squyres S W, Prettyman T H, Bruckner 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, Wanke H, Gasnault O, Hamara D K, Janes D M, Marcialis R L, Maurice S, Mikheeva I, Taylor G J, Tokar R, Shinohara C
机构信息
Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.
出版信息
Science. 2002 Jul 5;297(5578):81-5. doi: 10.1126/science.1073722. Epub 2002 May 30.
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 degrees latitude to about 40 grams per square centimeter at -77 degrees. 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.
利用“火星奥德赛”号上的伽马射线光谱仪，我们在火星两极附近识别出两个富含氢的区域。数据表明，存在一层富含氢的地下层，其上方覆盖着一层贫氢层。上层的厚度随着与极点距离的减小而减小，从北纬-42度处约每平方厘米150克的柱密度，到北纬-77度处约每平方厘米40克。富含氢的区域与预测的冰稳定区域相关。我们认为，地下层中的氢载体是冰，冰占该层重量的35±15%。
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