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Published Online February 17, 2005
Science DOI: 10.1126/science.1109438

Reports

Submitted on January 5, 2005
Accepted on February 7, 2005

Summer Evolution of the North Polar Cap of Mars as Observed by OMEGA/ Mars Express

Yves Langevin 1*, François Poulet 1, Jean-Pierre Bibring 1, Bernard Schmitt 2, Sylvain Douté 2, Brigitte Gondet 1

1 Institut d'Astrophysique Spatiale, CNRS-Université Paris Sud, 91405 Orsay, France.
2 Laboratoire de Planétologie de Grenoble, CNRS-Université Joseph Fourier, 38400 Grenoble, France.

The OMEGA Vis-IR imaging spectrometer has extensively observed regions of Mars with latitudes above 70°N in late 2004 (heliocentric longitude from Ls 93° to Ls 127°). The extent of water ice at the surface and the size of ice grains are 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 is model dependent. However, contamination of ice by dust is low.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Mars North Polar Deposits: Stratigraphy, Age, and Geodynamical Response.
R. J. Phillips, M. T. Zuber, S. E. Smrekar, M. T. Mellon, J. W. Head, K. L. Tanaka, N. E. Putzig, S. M. Milkovich, B. A. Campbell, J. J. Plaut, et al. (2008)
Science 320, 1182-1185
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Ancient Mars: Wet in Many Places.
D. A. Paige (2005)
Science 307, 1575-1576
   Abstract »    Full Text »    PDF »
Sulfates in the North Polar Region of Mars Detected by OMEGA/Mars Express.
Y. Langevin, F. Poulet, J.-P. Bibring, and B. Gondet (2005)
Science 307, 1584-1586
   Abstract »    Full Text »    PDF »
Mars Surface Diversity as Revealed by the OMEGA/Mars Express Observations.
J.-P. Bibring, Y. Langevin, A. Gendrin, B. Gondet, F. Poulet, M. Berthe, A. Soufflot, R. Arvidson, N. Mangold, J. Mustard, et al. (2005)
Science 307, 1576-1581
   Abstract »    Full Text »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)