Computer Science
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...79..311c&link_type=abstract
Icarus (ISSN 0019-1035), vol. 79, June 1989, p. 311-327.
Computer Science
51
Atmospheric Composition, Carbon Dioxide, Impact, Mars Atmosphere, Carbonates, Cratering, Ejecta, Meteorites, Water, Mars, Atmosphere, Recharge, Carbon Dioxide, Impacts, Carbonates, Burial, Shock Effects, Bombardment, Gardening, Water, Climate, Temperature, Ejecta, Calculations, Decomposition, Diagrams, Accretion, Carbon, Source, Meteorites, Production Rate, Volcanism, Erosion, Thickness, Abundance
Scientific paper
The question as to whether high impact rates early in the history of Mars could have aided in maintaining a relatively thick CO2 atmosphere is discussed. Such impacts could have released CO2 into the atmosphere by burial, by shock-induced release during impact events, and by the addition of carbon to Mars from the impacting bolides. On the assumption that cratering rates on Mars were comparable to those of the moon's Nectarial period, burial rates are a result of 'impact gardening' at the end of heavy bombardment are estimated to have ranged from 20 to 45 m/million years; at these rates, 0.1-0.2 bar of CO2 would have been released every 10 million years as a result of burial to depths at which carbonate dissociation temperatures are encountered.
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