A field study of the oxidation of SO2 in cloud

Thomas Choularton, P. A. Clark

    Research output: Contribution to journalArticlepeer-review


    Experiments are designed to isolate the effect on cloud chemistry by artificially releasing SO2 gas into the air entering cloud base. Observations clearly and unequivocally demonstrated the production of sulphate ions in cloudwater. A simultaneous decrease in H2O2 concentration demnostrated that about 40% of this arises from rapid reaction between H2O2 and SO2. The results of a comprehensive model of the cloud physical and chemical development at the site show good agreement with the observations, and indicate that the remaining fraction of sulphate produced resulted from the reaction of O3 with SO2 in cloudwater, promoted by the relatively high pH found in the cloud. -from Authors
    Original languageEnglish
    Pages (from-to)13-995
    Number of pages982
    JournalJournal of Geophysical Research: Atmospheres
    Issue number9
    Publication statusPublished - 1990


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