Mathematics – Logic
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13a1663b&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P13A-1663
Mathematics
Logic
[5415] Planetary Sciences: Solid Surface Planets / Erosion And Weathering, [5416] Planetary Sciences: Solid Surface Planets / Glaciation, [5422] Planetary Sciences: Solid Surface Planets / Ices
Scientific paper
Using high resolution stereo pairs (CTX) and stereo camera (HRSC) imagery sent back from Mars, it was found that Mamers Vallis, a fretted valley located at mid- latitudes, can be better understood with morphological and (crater) statistical analysis. Interpreted lateral moraines suggest a change in height of 200m on the valley floor south of a mound located at 37.85degN 16.90degE. Volumetric analyses show that the 32 km2 area near the mound lost ~6.4 billion cubic metres of water ice from sublimation. Until recently, the lack of surface coverage by high resolution (≤12.5m/pixel) instruments in orbit around Mars limited the age dating of young surfaces to small area statistics. In addition, a deficiency of Digital Terrain Models (DTM) of Mamers Vallis had not previously allowed for volumetric analyses of water ice loss. Using high resolution mosaics and a CTX DTM to examine glacial features and morphologies, we have shown that Mamers Vallis was affected by volatile migration in the Late Amazonian (37.7 to 288 Ma). The findings from these recent data add to the history of obliquity driven climate change and glacial migration on Mars.
Britton A. W.
Möller Jürgen
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