Stability of ammonia in the primitive terrestrial atmosphere

Details Stability of ammonia in the primitive terrestrial atmosphere Stability of ammonia in the primitive terrestrial atmosphere

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.3091k&link_type=abstract

Journal of Geophysical Research, vol. 87, Apr. 20, 1982, p. 3091-3098.

Mathematics

Logic

35

Ammonia, Atmospheric Chemistry, Atmospheric Models, Photochemical Reactions, Primitive Earth Atmosphere, Reaction Kinetics, Abiogenesis, Atmospheric Composition, Biological Evolution, Greenhouse Effect, Temperature Effects

Scientific paper

The rate at which ammonia would have been destroyed in the earth's atmosphere under assumed NH3 mixing ratio conditions of 10 to the -8th to 0.0001 is calculated by a one-dimensional photochemical model, and the destruction rates are compared with possible biotic and abiotic ammonia sources. It is found that, while the mixing ratio of 10 to the -8th needed for the evolution of life could have been maintained by abiotic sources, the value of 0.00001 needed for the production of significant greenhouse warming could not have been sustained abiotically. The increase of atmospheric ammonia due to biological activities during the Archean is also considered lower than the level required for the generation of measurable thermal effects.

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