Computer Science
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992msat.work..121p&link_type=abstract
In Lunar and Planetary Inst., Workshop on the Martian Surface and Atmosphere Through Time p 121 (SEE N92-28988 19-91)
Computer Science
1
Atmospheric Effects, Carbon Dioxide, Greenhouse Effect, Heat Transmission, Mars Atmosphere, Mars Environment, Temperature Effects, Climate Change, Ground Water, Mars Surface, Regolith, Valleys
Scientific paper
Previous arguments have suggested that the formation of the valley networks on Mars may be explained by higher internal regolith temperatures associated with a much higher heat flow early in the planet's history. It is possible that this higher heat flow could cause groundwater to be closer to the martian surface 3.8 billion years ago, and thus allow the formation of the valley networks by groundwater sapping, without having to invoke surface warming due to an atmospheric greenhouse effect. It was previously shown that, in fact, it may not be possible to completely separate the effects of higher heat flow and atmospheric greenhouse on early Mars. We have more fully explored the parametric space of our set of equations to better determine the sensitivity of the system to variations in any of the factors. The limiting factor in the effectiveness of an atmospheric greenhouse is the total CO2 available in the system. We find that a combination of higher heat flow and atmospheric greenhouse effect on early Mars may more easily explain valley network formation and distribution, even for a cool early sun, than either of these mechanisms separately.
Fanale Fraser P.
Postawko Susan
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