Volatile Mobilization by Large Impacts: Constraining the Initial Conditions of an Impact- generated Martian Greenhouse.

Details Volatile Mobilization by Large Impacts: Constraining the Initial Conditions of an Impact- generated Martian Greenhouse. Volatile Mobilization by Large Impacts: Constraining the Initial Conditions of an Impact- generated Martian Greenhouse.

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p53b1454p&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P53B-1454

Other

0545 Modeling (4255), 0550 Model Verification And Validation, 5220 Hydrothermal Systems And Weathering On Other Planets, 5420 Impact Phenomena, Cratering (6022, 8136), 6225 Mars

Scientific paper

There is substantial evidence for the presence of liquid water on the surface of Mars contemporary to the Late Heavy Bombardment. Large asteroid and comet impacts have been suggested by Carr (Water on Mars, 1996) and Segura et al. (Science, 2002) as possible triggers of warm and wet climate episodes early in Martian history. Here we model impacts into complex, stratigraphically realistic models of Noachian Mars as described by Nimmo and Tanaka (Ann. Rev. E. P. Sci. 2005). We do this in order to determine a lower bound on the energy and size scales of impact events that could trigger such a climate shift, and thus establish an upper bound on the frequency of such events. The frequency, magnitude, and surface effects of these large impacts would have had a significant effect on the habitability of Noachian Mars. This effort is supported by LANL/IGPP (CSP, RPW, KHW), by NASA PG&G (EA), and by NASA MFR (CSP, DGK).

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