Evidence for enhanced hydration on the northern flank of Olympus Mons, Mars

Details Evidence for enhanced hydration on the northern flank of Olympus Mons, Mars Evidence for enhanced hydration on the northern flank of Olympus Mons, Mars

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007icar..192..361b&link_type=abstract

Icarus, Volume 192, Issue 2, p. 361-377.

Physics

2

Scientific paper

In this paper we report about a small region on the northern scarp of Olympus Mons showing an increase of the 3 μm hydration band in the OMEGA spectra, together with low superficial temperatures. Although water ice clouds can occurs on the flank of big martian volcanoes, radiative transfer modeling indicates that atmospheric water ice alone cannot justify the shape of the observed band. A fit of the 1.9 3 μm absorption features is obtained by hypothesizing that the study region consists of a mixture of dust and water ice covered by an optically thin (τ=0.08 at 3 μm) layer of dust. Thermal modeling also suggests that water ice in this region may be stable during most of the martian year due to the saturation of the atmosphere. If water ice is responsible for the observed spectral behavior, it might consist of a number of ice or snow patches possibly deposited in small depressions.

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