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The BrO + Ch3O2 reaction: Kinetics and role in the atmospheric ozone budget
Author(s) -
Aranda Alfonso,
Le Bras Georges,
La Verdet Gérard,
Poulet Gilles
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl02686
Subject(s) - ozone , stratosphere , troposphere , reaction rate constant , atmosphere (unit) , kinetics , chemical kinetics , atmospheric sciences , environmental science , chemistry , reaction rate , atmospheric chemistry , ozone depletion , tropospheric ozone , ozone layer , air mass (solar energy) , arctic , boundary layer , meteorology , thermodynamics , physics , catalysis , geology , oceanography , organic chemistry , quantum mechanics
Using the discharge flow method with detection of species by mass spectrometry and laser‐induced fluorescence, the kinetics of the reaction BrO + CH 3 O 2 → products has been studied at 298 K. The rate constant obtained is (5.7±0.6) × 10 −12 cm³ molecule −1 s −1 . The mechanism of the reaction has been also investigated. These laboratory data are used to discuss the possible impact of this reaction on the ozone budget in different parts of the atmosphere. The reaction is likely to be negligible in the stratosphere, but is potentially significant in the remote marine boundary layer. The BrO+CH 3 O 2 reaction, together with other BrO+RO 2 reactions, may also significantly contribute to the ozone loss events observed in the Arctic troposphere in spring.