Articles | Volume 19, issue 9
Atmos. Chem. Phys., 19, 6579–6594, 2019
https://doi.org/10.5194/acp-19-6579-2019
Atmos. Chem. Phys., 19, 6579–6594, 2019
https://doi.org/10.5194/acp-19-6579-2019

Research article 17 May 2019

Research article | 17 May 2019

Photooxidants from brown carbon and other chromophores in illuminated particle extracts

Richie Kaur et al.

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Latest update: 23 Sep 2021
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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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