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Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2)
Cooperative Institute for Environmental Sciences, University of Colorado, Boulder, Colorado 8030
Cooperative Institute for Environmental Sciences, University of Colorado, Boulder, Colorado 8030
Cooperative Institute for Environmental Sciences, University of Colorado, Boulder, Colorado 8030
Cooperative Institute for Environmental Sciences, University of Colorado, Boulder, Colorado 8030
Cooperative Institute for Environmental Sciences, University of Colorado, Boulder, Colorado 8030
National Oceanic and Atmospheric Administration
National Oceanic and Atmospheric Administration
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; .
Citation: (1992), Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2), Geophys. Res. Lett., 19(20), 2059–2062.
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