Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005oleb...35..401n&link_type=abstract
Origins of Life and Evolution of Biospheres, Volume 35, Issue 5, pp.401-409
Physics
10
Corona Discharge, Energy Yield, Experimental Simulation, Nitric Oxide, Nitrogen Fixation, Nitrous Oxide, Primitive Earth
Scientific paper
We report the first experimental study of nitrogen fixation by corona discharge on the anoxic primitive Earth. The energy yields of nitric oxide (NO) and nitrous oxide (N2O) were experimentally determined over a wide range of CO2-N2 mixtures simulating the evolution of the Earth's atmosphere during the Hadean and Archean eras (from 4.5 ba to 2.5 ba). NO, the principal form of fixed nitrogen in lightning and coronal discharge in early Earth, is produced ten times less efficiently in the latter type of electrical discharge with an estimated maximum annual production rate of the order of 1010 g yr-1. For N2O the maximum production rate was estimated to be ˜109 g yr-1. These low rates of syntheses indicate that corona discharges as point discharges on the clouds and ground did not play a significant role in the overall pool of reactive nitrogen needed for the emergence and sustainability of life.
Coll Patrice
Navarro-González Rafael
Nna-Mvondo Delphine
Raulin François
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