Articles | Volume 18, issue 8
https://doi.org/10.5194/acp-18-5549-2018
https://doi.org/10.5194/acp-18-5549-2018
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24 Apr 2018
Research article | Highlight paper |  | 24 Apr 2018

Novel pathway of SO2 oxidation in the atmosphere: reactions with monoterpene ozonolysis intermediates and secondary organic aerosol

Jianhuai Ye, Jonathan P. D. Abbatt, and Arthur W. H. Chan

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Short summary
Synergistic effects between SOA formation and SO2 oxidation through Criegee chemistry and reactive uptake by organic peroxides were observed. The relative importance of these two pathways (Criegee vs. peroxide) varies with relative humidity. The latter SO2 loss mechanism to organic peroxides in SOA has not previously been identified. Our results suggest a new pathway of atmospheric SO2 oxidation, which may contribute to the missing mechanisms of high-sulfate production in the polluted areas.
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