Summer evolution of the north polar cap of Mars as observed by OMEGA/Mars express

被引：126

作者：

Langevin, Y ^{[1
]}

Poulet, F

Bibring, JP

Schmitt, B

Douté, S

Gondet, B

机构：

[1] Univ Paris 11, CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France

[2] Univ Grenoble 1, CNRS, Lab Planetol Grenoble, F-38400 Grenoble, France

来源：

SCIENCE | 2005年 / 307卷 / 5715期

关键词：

D O I：

10.1126/science.1109438

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Observatoire pour la Mineralogie, l'Eau, les Gtaces, et l'Activite (OMEGA) visible-infrared imaging spectrometer extensively observed regions of Mars with latitudes above 70degreesN in late 2004 (heliocentric longitude from L-s 93degrees to L-s 127degrees). The extent of water ice at the surface and the size of ice grains were monitored as a function of time. Bright, small-grained frost, which initially covered a large fraction of the polar cap, waned in favor of large-grained ice. In outlying regions, dominated by large-grained ice, the albedo increased over the period. Evaluating the dust content was mode[ dependent. However, contamination of ice by dust was low.

引用

页码：1581 / 1584

页数：4

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