Physics
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8..941s&link_type=abstract
Geophysical Research Letters, vol. 8, Aug. 1981, p. 941-944. U.S. Environmental Protection Agency
Physics
113
Acetyl Compounds, Air Pollution, Atmospheric Chemistry, Atmospheric Composition, Nitrates, Peroxides, Abundance, Acetaldehyde, Acetone, Ethane, Methane, Nitrogen Oxides, Oxidation, Prediction Analysis Techniques, Propane, Stratosphere, Troposphere
Scientific paper
Large concentrations of acetaldehyde, acetone, and peroxyacetyl nitrate (PAN) are predicted to exist in the unpolluted atmosphere. Predictions are based on the measured atmospheric distributions of ethane and propane, and a simplified mechanism for their oxidation. Average acetaldehyde concentrations of 22, 3, and 7 parts per trillion (ppt), average acetone concentrations of 111, 15, and 3 ppt, and average PAN concentrations of 17 to 34, 90 to 360, and 40 to 85 ppt are estimated for the troposphere and lower stratosphere respectively. Calculations indicate that nitrogen oxides in an organic form may be more abundant than those in an inorganic form in the troposphere. The organic form of reactive nitrogen is found in a chemical equilibrium with inorganic NO2, and measurement methods for PAN verify the predicted results.
Hanst Philip L.
Singh Hanwant B.
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