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Title: Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2)

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 semiempirical model (Solomon et al., 1992) and a 2D model to calculate the steady-state ozone depletion potentials (ODP) and atmospheri lifetimes, tau, with greatly improved accuracy as compared to earlier studies. The calculated ODPs and tau are 0.65 and 1.7 years and 0.17 and 0.41 years for CH3Br and CH2Br2, respectively, using the semiempirical model. These lifetimes agree well with those calculated using a 2D model. This study better quantifies the ODPs and tau of these species which are needed inputs for discussion of possible regulation of human emissions currently under international considerations. 29 refs.

Authors:
; ; ; ; ; ;  [1]
  1. (NOAA, Boulder, CO (United States))
Publication Date:
OSTI Identifier:
7184465
Alternate Identifier(s):
OSTI ID: 7184465
Resource Type:
Journal Article
Journal Name:
Geophysical Research Letters (American Geophysical Union); (United States)
Additional Journal Information:
Journal Volume: 19:20; Journal ID: ISSN 0094-8276
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; BROMINATED ALIPHATIC HYDROCARBONS; ATMOSPHERIC CHEMISTRY; ECOLOGICAL CONCENTRATION; METHYL BROMIDE; OZONE; CHEMICAL REACTION KINETICS; EARTH ATMOSPHERE; FLUORESCENCE; HYDROXYL RADICALS; MATHEMATICAL MODELS; PHOTOLYSIS; CHEMICAL REACTIONS; CHEMISTRY; DECOMPOSITION; HALOGENATED ALIPHATIC HYDROCARBONS; KINETICS; LUMINESCENCE; ORGANIC BROMINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; PHOTOCHEMICAL REACTIONS; RADICALS; REACTION KINETICS 540120* -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (1990-)

Citation Formats

Mellouki, A., Talukdar, R.K., Schmoltner, A., Gierczak, T., Mills, M.J., Solomon, S., and Ravishankara, A.R. Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2). United States: N. p., 1992. Web. doi:10.1029/92GL01612.
Mellouki, A., Talukdar, R.K., Schmoltner, A., Gierczak, T., Mills, M.J., Solomon, S., & Ravishankara, A.R. Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2). United States. doi:10.1029/92GL01612.
Mellouki, A., Talukdar, R.K., Schmoltner, A., Gierczak, T., Mills, M.J., Solomon, S., and Ravishankara, A.R. Thu . "Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2)". United States. doi:10.1029/92GL01612.
@article{osti_7184465,
title = {Atmospheric lifetimes and ozone depletion potentials of methyl bromide (CH3Br) and dibromomethane (CH2Br2)},
author = {Mellouki, A. and Talukdar, R.K. and Schmoltner, A. and Gierczak, T. and Mills, M.J. and Solomon, S. and Ravishankara, A.R.},
abstractNote = {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 semiempirical model (Solomon et al., 1992) and a 2D model to calculate the steady-state ozone depletion potentials (ODP) and atmospheri lifetimes, tau, with greatly improved accuracy as compared to earlier studies. The calculated ODPs and tau are 0.65 and 1.7 years and 0.17 and 0.41 years for CH3Br and CH2Br2, respectively, using the semiempirical model. These lifetimes agree well with those calculated using a 2D model. This study better quantifies the ODPs and tau of these species which are needed inputs for discussion of possible regulation of human emissions currently under international considerations. 29 refs.},
doi = {10.1029/92GL01612},
journal = {Geophysical Research Letters (American Geophysical Union); (United States)},
issn = {0094-8276},
number = ,
volume = 19:20,
place = {United States},
year = {1992},
month = {10}
}