Mathematics – Logic
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p33b..06c&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #P33B-06
Mathematics
Logic
5407 Atmospheres: Evolution, 5415 Erosion And Weathering, 6200 Planetology: Solar System Objects (New Field), 6205 Asteroids And Meteoroids, 6225 Mars
Scientific paper
Impacts of moderate sized asteroids result in changes to the early Martian climate which would allow for short-lived, vigorous hydrological cycles. The extent, volume and duration of precipitation, surface runoff and "ponding" which occurs during these impact driven hydrologic cycles varies with the size of the impactor and the solar insolation at the site of the impact. Presented in this paper are simulation results from the NASA Ames Mars Impact General Circulation Model (MIGCM). The MIGCM simulates the effects of impacts on the climate of early Mars and includes a hydrological cycle from which precipitation, runoff rates and ponding can be predicted. Using the precipitation and runoff rates, total fluvial erosion rates are estimated and compared with observations of fluvial crater modification. It is concluded that the transient climates associated with impacts constitute a significant, if not dominate, source of early Martian fluvial erosion.
Colaprete Anthony
Haberle Robert M.
Segura Teresa L.
Toon Brian O.
Zahnle Kevin
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