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Science 10 July 1992:
Vol. 257. no. 5067, pp. 227 - 230
DOI: 10.1126/science.257.5067.227
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Articles

Kinetics of the OH Reaction with Methyl Chloroform and Its Atmospheric Implications

Ranajit K. Talukdar 1, Abdelwahid Mellouki 1, Anne-Marie Schmoltner 1, Thomas Watson 1, Stephen Montzka 2, and A. R. Ravishankara 3

1 National Oceanic and Atmospheric Administration, Environmental Laboratories, Aeronomy Laboratory, Boulder, CO 80303 and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309
2 Climate and Diagnostic Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80303
3 National Oceanic and Atmospheric Administration, Environmental Laboratories, Aeronomy Laboratory, Boulder, CO 80303 and Cooperative Institute for Research in Environmental Sciences and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309

The rate coefficients for the reaction of hydroxyl (OH) radicals with methyl chloroform (CH3CCI3) were measured between 243 and 379 kelvin with the pulsed photolysis—laserinduced fluorescence method. The measured rate coefficients at 298 and 277 kelvin were sim20 and sim15%, respectively, lower than earlier values. These results will increase the tropospheric OH concentrations derived from the CH3CCI3 budget analysis by sim15%. The predicted atmospheric lifetimes of species whose main loss process is the reaction with OH in the troposphere will be lowered by 15% with consequent changes in their budgets, global warming potentials, and ozone depletion potentials.

Submitted on March 30, 1992
Accepted on May 18, 1992


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Climate and environmental change at high northern latitudes.
L. Kullman (1994)
Progress in Physical Geography 18, 124-135
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Science. ISSN 0036-8075 (print), 1095-9203 (online)