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

Keywords