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GEOPHYSICAL RESEARCH LETTERS,
VOL. 19, NO. 20,
PAGES 2059–2062,
1992
ATMOSPHERIC LIFETIMES AND OZONE DEPLETION POTENTIALS OF METHYL BROMIDE (CH3Br) AND DIBROMOMETHANE (CH2Br2)
A. Mellouki
National Oceanic and Atmospheric Administration
Ranajit K. Talukdar
National Oceanic and Atmospheric Administration
Anne-Marie Schmoltner
National Oceanic and Atmospheric Administration
Tomasz Gierczak
National Oceanic and Atmospheric Administration
Michael J. Mills
National Oceanic and Atmospheric Administration
Susan Solomon
National Oceanic and Atmospheric Administration
A. R. Ravishankara
National Oceanic and Atmospheric Administration
Abstract
The rate coefficients for the reactions of OH radical with CH3Br and CH2Br2 were measured as functions of temperature using the laser photolysis - laser induced fluorescence method. This data was incorporated
into a semi-empirical model [Solomon et al., 1992] and a 2-D model to calculate the steady - state Ozone Depletion Potentials
(ODP) and atmospheric lifetimes, τ, with greatly improved accuracy as compared to earlier studies. The calculated ODPs and
τ are 0.65 and 1.7 years and 0.17 and 0.41 years for CH3Br and CH2Br2, respectively, using the semi-empirical model. These lifetimes agree well with those calculated using a 2-D model. This study
better quantifies the ODPs and τ of these species which are needed inputs for discussion of possible regulation of human emissions
currently under international considerations.
Received 1
June
1992;
accepted 16
June
1992.
Subscriber Access to Full Article (Nonsubscribers may purchase for $9.00, Includes print PDF)
Citation: Mellouki, A., R. K. Talukdar, A.-M. Schmoltner, T. Gierczak, M. J. Mills, S. Solomon, and A. R. Ravishankara
(1992),
ATMOSPHERIC LIFETIMES AND OZONE DEPLETION POTENTIALS OF METHYL BROMIDE (CH3Br) AND DIBROMOMETHANE (CH2Br2),
Geophys. Res. Lett.,
19(20),
2059–2062.
Copyright 1992 by the American Geophysical Union.
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