North Polar Region of Mars: Evidence for Residual Cap Retreat and Basal Melting

Details North Polar Region of Mars: Evidence for Residual Cap Retreat and Basal Melting North Polar Region of Mars: Evidence for Residual Cap Retreat and Basal Melting

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mpse.conf...40f&link_type=abstract

International Conference on Mars Polar Science and Exploration, p. 40

Other

Mars (Planet), Mars Surface, Planetary Geology, Polar Caps, Polar Regions, Melting, Ice, Terrain, Dunes, Collapse, Asymmetry, Ablation

Scientific paper

We present evidence for asymmetric retreat of the north polar cap (consisting of polar layered terrain and polar residual ice) of Mars. This evidence exists in the form of the Olympia Lobe (a portion of the cap now covered by dunes), outlying polar material remnants, and depressions interpreted to be kettles. Several possible causes of this retreat include: 1) a decrease in accumulation, 2) an increase in ablation rates, and 3) melting of polar material. Evidence of past melting exists in the form of Chasma Boreale and other, smaller chasmae. These features are interpreted to have been formed by the basal outflow of melt water and consequent collapse of polar materials. Additional information is contained in the original extended abstract.

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