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Detailed Reference Information |
Burkholder, J.B., Wilson, R.R., Gierczak, T., Talukdar, R., McKeen, S.A., Orlando, J.J., Vaghjiani, G.L. and Ravishankara, A.R. (1991). Atmospheric fate of CF3Br, CF2Br2, CF2ClBr, and CF2BrCF2BR. Journal of Geophysical Research 96: doi: 10.1029/90JD02735. issn: 0148-0227. |
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The temperature dependent UV absorption cross sections of the haloalkanes CF2Br, CF2ClBr, CF2Br2, and CF2BrcF2Br are reported. The UV absorption cross sections were measured over the temperature range 210 to 296 K and the wavelength range 190 to 320 nm. Upper limits of the rate coefficients for the reactions of OH with CF3Br, CF2Br2, CF2ClBr, and CF2BrCF2Br were also determined using both pulsed photolysis and flow tube techniques. The rate coefficients at 296 K were found to be <1.2¿10-16, <1.5¿10-16, <5.0¿10-16, and <1.5¿10-16 cm3 molec-1 s-1 for CF3Br, CF2ClBr, CF2Br2, and CF2BrCF2Br, respectively. The UV absorption cross-section data and OH reaction rate coefficients of these species were combined with a one-dimensional model to yield atmospheric lifetimes of 65, 16, 3.2, and <20 years for CF3Br, CF2ClBr, CF2Br2, and CF2BrCF2Br, respectively. ¿ American Geophysical Union 1991 |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Transmission and scattering of radiation, Atmospheric Composition and Structure, Middle atmosphere—composition and chemistry, Atmospheric Composition and Structure, Troposphere—composition and chemistry |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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