Mathematics – Logic
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985orli...15..299l&link_type=abstract
Origins of Life (ISSN 0302-1688), vol. 15, no. 4, 1985, p. 299-318.
Mathematics
Logic
7
Atmospheric Composition, Atmospheric Models, Biological Evolution, Photochemical Reactions, Planetary Evolution, Primitive Earth Atmosphere, Reaction Kinetics, Vertical Distribution
Scientific paper
The distribution of gases in the prebiologial paleoatmosphere is investigated using photochemical models. A chart of the photochemical and chemical reactions and reaction rates for CH4, NH3, H2S, N2O, and CO atmospheric gases is given. Mixing ratios and surface mixing ratios for CH4, NH3, CO, and N2O are obtained using thermodynamic equilibrium calculations; an increase in CH4 and N2O is observed. The reactions, which explain the photochemistry of the gases studied, are presented. The sources of these gases and their concentration with regards to altitude are examined. Graphs of the vertical distribution of CH4, NH3, H2S, CO, O2, and N2O in prebiological paleoatmosphere are provided. The data reveals the presence of only N2, CO2, and N2O in the early atmosphere; with the evolution of life, sources of atmospheric gases increased and their influence on the photochemistry of the troposphere and stratosphere increased.
Augustsson Tommy R.
Levine Joel S.
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