Chemical Composition of Acid Fog

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Science  12 Nov 1982:
Vol. 218, Issue 4573, pp. 677-680
DOI: 10.1126/science.218.4573.677


Fog water collected at three sites in Los Angeles and Bakersfield, California, was found to have higher acidity and higher concentrations of sulfate, nitrate, and ammonium than previously observed in atmospheric water droplets. The pH of the fog water was in the range of 2.2 to 4.0. The dominant processes controlling the fog water chemistry appear to be the condensation and evaporation of water vapor on preexisting aerosol and the scavenging of gas-phase nitric acid.

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