Was early Mars warmed by ammonia?

Details Was early Mars warmed by ammonia? Was early Mars warmed by ammonia?

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992msat.work...84k&link_type=abstract

In Lunar and Planetary Inst., Workshop on the Martian Surface and Atmosphere Through Time p 84-85 (SEE N92-28988 19-91)

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1

Ammonia, Atmospheric Composition, Greenhouse Effect, Mars Atmosphere, Mars Surface, Outgassing, Planetary Evolution, Surface Temperature, Volcanoes, Atmospheric Models, Carbon Dioxide, Mars Environment, Photolysis, Ultraviolet Radiation

Scientific paper

Runoff channels and valley networks present on ancient, heavily cratered Martian terrain suggests that the climate of Mars was originally warm and wet. One explanation for the formation of these channels is that the surface was warmed by the greenhouse effect of a dense, CO2 atmosphere. However, recent work shows that this theory is not consistent for the early period of the solar system. One way to increase the surface temperature predicted is to assume that other greenhouse gases were present in Mars' atmosphere in addition to CO2 and H2O. This possible gas is ammonia, NH3. If ammonia was present in sufficient quantities, it could have raised the surface temperature to 273 K. An adequate source would have been volcanic outgassing if the NH3 produced was shielded from photolysis by an ultraviolet light absorber.

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