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Science 13 January 1978:
Vol. 199. no. 4325, pp. 174 - 177
DOI: 10.1126/science.199.4325.174
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Articles

Methyl Chloroform: Impact on Stratospheric Ozone

J. C. McCONNELL 1 and H. I. SCHIFF 2

1 Department of Physics and Centre for Research in Experimental Space Science, York University, Downsview, Ontario, Canada
2 Department of Chemistry, York University

Regulations to limit the use of trichloroethylene as a degreasing solvent have led to an increased use of the more photochemically inert solvent methyl chloroform as a substitute. Model calculations show that about 15 percent of the methyl chloroform released into the atmosphere will reach the stratosphere. Time scenarios based on past production figures and reasonable projections for future release rates lead to a steady-state ozone depletion due to this solvent about 20 percent as large as those resulting from the continuous release of chlorofluoromethanes at 1973 rates.

Submitted on March 28, 1977
Revised on November 11, 1977


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Atmospheric Trends in Methylchloroform and the Global Average for the Hydroxyl Radical.
R. PRINN, D. CUNNOLD, R. RASMUSSEN, P. SIMMONDS, F. ALYEA, A. CRAWFORD, P. FRASER, and R. ROSEN (1987)
Science 238, 945-950
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