Articles | Volume 19, issue 9
https://doi.org/10.5194/acp-19-6579-2019
https://doi.org/10.5194/acp-19-6579-2019
Research article
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17 May 2019
Research article | Highlight paper |  | 17 May 2019

Photooxidants from brown carbon and other chromophores in illuminated particle extracts

Richie Kaur, Jacqueline R. Labins, Scarlett S. Helbock, Wenqing Jiang, Keith J. Bein, Qi Zhang, and Cort Anastasio

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AR by Cort Anastasio on behalf of the Authors (23 Apr 2019)  Manuscript 
ED: Publish as is (25 Apr 2019) by Manabu Shiraiwa
AR by Cort Anastasio on behalf of the Authors (26 Apr 2019)
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Short summary
We measured hydroxyl radical (OH), singlet oxygen (1O2*), and organic triplets (3C*) in illuminated aqueous particle extracts. After measuring the impact of dilution on oxidant concentrations, we extrapolated our results to predict them in ambient particles – 1O2* and 3C* concentrations appear to be greatly enhanced, while OH appears largely unchanged. Two of these oxidants (1O2*, 3C*) are not yet included in atmospheric models, and our results make it possible to include them in the future.
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