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

Abstract : The Observatoire pour la Mineralogie, l'Eau, les Glaces, et l'Activite (OMEGA) visible-infrared imaging spectrometer extensively observed regions of Mars with latitudes above 70[degrees]N in late 2004 (heliocentric longitude from Ls 93[degrees] to Ls 127[degrees]). 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 model dependent. However, contamination of ice by dust was low.
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https://hal-insu.archives-ouvertes.fr/insu-00356297
Contributor : Béatrice Pibaret-Bourdon <>
Submitted on : Tuesday, January 27, 2009 - 10:52:20 AM
Last modification on : Friday, September 25, 2020 - 11:20:11 AM

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Y. Langevin, F. Poulet, J.-P. Bibring, Bernard Schmitt, Sylvain Douté, et al.. Summer Evolution of the North Polar Cap of Mars as Observed by OMEGA/Mars Express. Science, American Association for the Advancement of Science, 2005, 307 (5715), pp.1581-1584. ⟨10.1126/science.1109438⟩. ⟨insu-00356297⟩

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