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Chemistry of a polluted cloudy boundary layerA one-dimensional photochemical model for cloud-topped boundary layers has been developed to include descriptions of gas- and aqueous-phase chemistry and the radiation field in and below the cloud. The model is applied to the accumulation of pollutants during a wintertime episode with low stratus over Bakersfield, CA. The mechanisms of sulfate production and the balance between the concentrations of acids and bases are examined. It is shown that most of the sulfate production may be explained by the Fe(III)-catalyzed autoxidation of S(IV). Another source of sulfate is the oxidation of SO2 by OH in both the gas and the aqueous phase. It is shown that the sulfate production in the model is controlled by the availability of NH3. It is suggested that this explains the balance observed between total concentration of acids and bases.
Document ID
19900024564
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jacob, Daniel J.
(Harvard Univ. Cambridge, MA, United States)
Gottlieb, Elaine W.
(Harvard University Cambridge, MA, United States)
Prather, Michael J.
(NASA Goddard Institute for Space Studies New York, United States)
Date Acquired
August 14, 2013
Publication Date
September 20, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
90A11619
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-13153
CONTRACT_GRANT: NSF ATM-86-06057
Distribution Limits
Public
Copyright
Other

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