Chemical evolution and ammonia in the early earth's atmosphere

Details Chemical evolution and ammonia in the early earth's atmosphere Chemical evolution and ammonia in the early earth's atmosphere

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.287..526h&link_type=abstract

Nature, vol. 287, Oct. 9, 1980, p. 526-528.

Mathematics

Logic

11

Ammonia, Atmospheric Chemistry, Chemical Evolution, Earth Atmosphere, Photochemical Reactions, Planetary Evolution, Primitive Earth Atmosphere, Atmospheric Composition, Biological Evolution, Nitrogen, Precambrian Period, Reduction (Chemistry), Titanium Oxides

Scientific paper

A constraint on research into the evolution of the earth's atmosphere may have been resolved by recent work on the photochemical reduction of atmospheric nitrogen by a naturally occurring form of TiO2. It is shown that this source could have provided a small but vital abiological supply of ammonia in the early atmosphere of the earth. Locally the levels of NH3 produced by this mechanism satisfy the requirements of origin-of-life biologists while global levels do not conflict with chemical and physical constraints on the surface/atmosphere system nor with geological evidence for early Precambrian conditions.

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