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SO 2 oxidation via the hydroxyl radical: Atmospheric fate of HSOx radicals
Author(s) -
Davis D. D.,
Ravishankara A. R.,
Fischer S.
Publication year - 1979
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/gl006i002p00113
Subject(s) - radical , troposphere , stratosphere , atmosphere (unit) , trace gas , hydroxyl radical , atmospheric chemistry , kinetics , atmospheric pressure , chemistry , photochemistry , aerosol , chemical kinetics , atmospheric sciences , ozone , meteorology , organic chemistry , geology , physics , quantum mechanics
Reported in this study are the results from a gas kinetics — aerosol laboratory study involving the OH induced oxidation of SO 2 . At tropospheric and lower stratospheric pressures, reaction (1) is neither a third order process nor is it a simple bimolecular reaction. The effective bimolecular k value at one atmosphere (N 2 ) pressure has been estimated by these authors to be 9 × 10 −13 cm³/molec/s. Based on estimated k values and concentrations for several trace gases, it is suggested here that the resulting HSO 3 radical from reaction (1) under atmospheric conditions would react predominantly with O 2 in both the lower stratosphere and the troposphere. It is further suggested that the product HSO 5 radical would undergo hydration in both atmospheric regions.