Computer Science
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...39..296l&link_type=abstract
Icarus, vol. 39, Aug. 1979, p. 296-309.
Computer Science
Atmospheric Chemistry, Atmospheric Composition, Atmospheric Models, Ozone, Planetary Evolution, Photochemical Reactions, Primitive Earth Atmosphere, Troposphere, Vertical Distribution
Scientific paper
The rise of atmospheric O3 as a function of the evolution of O2 has been investigated using a one-dimensional steady-state photochemical model based on the chemistry and photochemistry of Ox(O3, O, O(1D)), N2O, NOx(NO, NO2, HNO3), H2O, and HOx(H, OH, HO2, H2O2) including the effect of vertical eddy transport on the species distribution. The total O3 column density was found to maximize for an O2 level of 0.1 present atmospheric level (PAL) and exceeded the present total O3 column by about 40%. For that level of O2, surface and tropospheric O3 densities exceeded those of the present atmosphere by about an order of magnitude. Surface and tropospheric OH densities of the paleoatmosphere exceeded those of the present atmosphere by orders of magnitude. It was also found that in the O2-deficient paleoatmosphere, N2O (even at present atmospheric levels) produces much less NOx than it does in the present atmosphere.
Hays Paul B.
Levine Joel S.
Walker James C. G.
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