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The influence of in-cloud chemical reactions on ozone formation in polluted areas

Author(s): C. Walcek & H. Yuan Abstract: Aqueous reactions among dissolved radicals and trace metals have been incorporated into a comprehensive gas-phase chemical reaction mechanism in order to quantify the chemical influences of clouds on ozone (63) formation in the lower troposphere. In-cloud reactions of dissolved HC>2 with itself, the reaction of dissolved 63 and HC>2, and reactions of dissolved HC>2 with copper dramatically reduce total HO] and other free-radical concentrations in clouds, thereby reducing the rate at which 83 is produced from anthropogenic NO% and hydrocarbons. Under typical urban or moderately polluted conditions, local ozone formation rates are reduced by 30-90% when aqueous reactions are occurring. However, the rate at which NO%, Non-Methane HydroCarbons (NMHC), and 63 are oxidized is also reduced, resulting in longer atmospheri... Pages: 10 Size: 1,063 kb Paper DOI: 10.2495/AIR960221

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Download the Full Article This article is part of the WIT OpenView scheme and you can download the full text Adobe PDF article for FREE by clicking the 'Openview' icon to the right.