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Published January 1984 | public
Journal Article

The occurrence of bisulfite-aldehyde addition products in fog- and cloudwater


Elevated concentrations of S(IV) and formaldehyde were observed in fog- and cloudwater at sites in California. The highest concentrations (up to 3 mM S(IV) and 0.7 mM CH_2O) were measured at Bakersfield, during a prolonged period of repeated fog. In Bakersfield [S(IV)] generally exceeded [CH_2O], while in the Los Angeles area the reverse was observed. The lowest concentrations of both species were observed at marine and high altitude sites away from local emissions. Equilibrium computations indicate that high concentrations of S(IV) cannot be achieved without the formation of S(IV)-RCHO adducts.

Additional Information

© 1984 Reidel Publishing Company. Received: 24 October 1983; in revised form: 7 February 1984. This research was supported by the California Air Resources Board (Contract A2-048-32). We thank the CARB, the South Coast Air Quality Management District, the Los Angeles County Fire Department Forestry Division, the United States Navy, the National Park Service, and the Mt. Wilson Observatories for logistical support and the use of field facilities. We also thank J. Waldman and S. Boyce for their contributions to the success of this project.

Additional details

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