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Chemistry of OH in remote clouds and its role in the production of formic acid and peroxymonosulfateThe chemistry of OH in nonprecipitating tropospheric clouds was studied using a coupled gas phase/aqueous phase chemical model. The simulation takes into account the radial dependence of the concentrations of short lived aqueous phase species, in particular, O3(aq) OH(aq). Formic acid is shown to be rapidly produced by the aqueous phase reaction between H2C(OH)2 and OH, but HCOO(-) and OH, but HCOO(-) is in turn rapidly oxidized by OH(aq). The HCOOH concentration in cloud is shown to be strongly dependent on the pH of the cloud water; clouds with pH greater than 5 are not efficient HCOOH sources. A novel mechanism is proposed for the oxidation of S(IV) by OH(aq), with the main product predicted to be peroxymonosulfate, HSO5(-). The latter could contribute significantly to total cloud water sulfur.
Document ID
19870027229
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jacob, D. J.
(Harvard University Cambridge, MA, United States)
Date Acquired
August 13, 2013
Publication Date
August 20, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
87A14503
Funding Number(s)
CONTRACT_GRANT: NAGW-731
CONTRACT_GRANT: NSF ATM-83-17009
Distribution Limits
Public
Copyright
Other

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