Mathematics – Logic
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25..521p&link_type=abstract
Planetary and Space Science, vol. 25, June 1977, p. 521-540.
Mathematics
Logic
2
Air Pollution, Atmospheric Chemistry, Atmospheric Composition, Hydrogen, Man Environment Interactions, Atmospheric Models, Carbon Monoxide, Methane, Tables (Data)
Scientific paper
Oxidation of CH4 provides the major source for atmospheric H2, which is removed mainly by reaction with OH. Biological activity at earth's surface appears to represent at most a minor sink for H2. Anthropogenic activity is a significant source for both H2 and CO in the present atmosphere and may be expected to exert a growing influence in the future. Models are presented which suggest a rise in the mixing ratio of H2 from its present value of 5.6 ten-millionths to about 1.8 millionths by the year 2100. The mixing ratio of CO should grow from 9.7 hundred-millionths to 2.3 ten-millionths over the same time period, and there should be a rise in CH4 by about a factor of 1.5 associated with anthropogenically induced reductions in tropospheric OH.
McElroy Michael B.
Penner Joyce E.
Wofsy Steven C.
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