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Fogwater chemistry in an urban atmosphere

Munger, J. William and Jacob, Daniel J. and Waldman, Jed M. and Hoffmann, Michael R. (1983) Fogwater chemistry in an urban atmosphere. Journal of Geophysical Research C, 88 (C9). pp. 5109-5121. ISSN 0148-0227. doi:10.1029/JC088iC09p05109.

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Analyses of fogwater collected by inertial impaction in the Los Angeles basin and the San Joaquin Valley indicated unusually high concentrations of major and minor ions. The dominant ions measured were NO_3^−, SO_4^(2−), NH_4^+, and H^+. Nitrate exceeded sulfate on an equivalent basis by a factor of 2.5 in the central and coastal regions of the Los Angeles basin but was approximately equal in the eastern Los Angeles basin and the San Joaquin Valley. Maximum observed values for NH_4^+, NO_3^−, and SO_4^(2−) were 10.0, 12.0, and 5.0, meq 1^(−1), while the lowest p;H observed was 2.2. Iron and lead concentrations of over 0.1 mM and 0.01 mM, respectively, were observed. High concentrations of chemical components in fog appeared to correlate well with the occurrence of smog events. Concentrations in fogwater were also affected by the physical processes of condensation and evaporation. Light, dissipating fogs routinely showed the highest concentrations.

Item Type:Article
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Jacob, Daniel J.0000-0002-6373-3100
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 1983 American Geophysical Union. Received October 4, 1982; revised February 4, 1983; accepted February 17, 1983. We gratefully acknowledge the financial support of the California Air Resources Board and the invaluable assistance provided by its professional staff. Additional logistical support was provided by the South Coast Air Quality Management District. Special thanks are extended to R. C. Flagan, J. J. Morgan, D. Lawson, and D. Grosjean for their contributions to the success of this research.
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California Air Resources Board (CARB)UNSPECIFIED
Issue or Number:C9
Record Number:CaltechAUTHORS:20150820-144458286
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Official Citation:Munger, J. W., D. J. Jacob, J. M. Waldman, and M. R. Hoffmann (1983), Fogwater chemistry in an urban atmosphere, J. Geophys. Res., 88(C9), 5109–5121, doi:10.1029/JC088iC09p05109.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59793
Deposited By: Ruth Sustaita
Deposited On:21 Aug 2015 18:36
Last Modified:10 Nov 2021 22:25

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