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Science 26 February 1982:
Vol. 215. no. 4536, pp. 1095 - 1097
DOI: 10.1126/science.215.4536.1095
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Articles

Nitrogen Oxide Reactions in the Urban Plume of Boston

CHESTER W. SPICER 1

1 Chemistry Department, Battelle Columbus Laboratories, Columbus, Ohio 43201

The rate of removal or conversion of nitrogen oxides has been determined from airborne measurements in the urban plume of Boston. The average pseudo-first-order rate constant for removal was 0.18 per hour, with a range of 0.14 to 0.24 per hour under daylight conditions for four study days. The removal process is dominated by chemical conversion to nitric acid and organic nitrates. The removal rate suggests an atmospheric lifetime for nitrogen oxides of about 5 to 6 hours in urban air.

Submitted on August 27, 1981
Revised on October 26, 1981

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Science. ISSN 0036-8075 (print), 1095-9203 (online)