26 July 2014
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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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Air Pollution IV

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