Articles | Volume 14, issue 22
Atmos. Chem. Phys., 14, 12209–12223, 2014
https://doi.org/10.5194/acp-14-12209-2014
Atmos. Chem. Phys., 14, 12209–12223, 2014
https://doi.org/10.5194/acp-14-12209-2014
Research article
 | Highlight paper
20 Nov 2014
Research article  | Highlight paper | 20 Nov 2014

Missing SO2 oxidant in the coastal atmosphere? – observations from high-resolution measurements of OH and atmospheric sulfur compounds

H. Berresheim et al.

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Short summary
Sulfuric acid plays a major role in the formation of aerosol particles and clouds. Measurements at the west coast of Ireland reveal that oxidation of SO2 by OH explains only 20%, on average, of H2SO4 formation in coastal marine air. Additional sources may be (a) oxidation by Criegee intermediates produced photolytically and/or (b) formation from SO3 instead of SO2 in the oxidation of dimethyl sulfide, suggesting an important role of marine emissions in the self-cleaning power of the atmosphere.
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