A Sulfur Dioxide Climate Feedback on Early Mars

Details A Sulfur Dioxide Climate Feedback on Early Mars A Sulfur Dioxide Climate Feedback on Early Mars

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sci...318.1903h&link_type=abstract

Science, Volume 318, Issue 5858, pp. 1903- (2007).

Mathematics

Logic

44

Scientific paper

Ancient Mars had liquid water on its surface and a CO2-rich atmosphere. Despite the implication that massive carbonate deposits should have formed, these have not been detected. On the basis of fundamental chemical and physical principles, we propose that climatic conditions enabling the existence of liquid water were maintained by appreciable atmospheric concentrations of volcanically degassed SO2 and H2S. The geochemistry resulting from equilibration of this atmosphere with the hydrological cycle is shown to inhibit the formation of carbonates. We propose an early martian climate feedback involving SO2, much like that maintained by CO2 on Earth.

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