Photooxidants from brown carbon and other chromophores in illuminated particle extracts

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

doi:https://doi.org/10.5194/acp-19-6579-2019

Articles | Volume 19, issue 9

https://doi.org/10.5194/acp-19-6579-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-19-6579-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 9

Research article

| Highlight paper

|

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

Supplement

https://doi.org/10.5194/acp-19-6579-2019-supplement

Data sets

UV-visible absorption coefficients normalized to DOC of aqueous extracts of wintertime PM collected in Davis, CA, USA R. Kaur, J. R. Labins, S. S. Helbock, W. Jiang, K. Bein, Q. Zhang, and C. Anastasio https://doi.pangaea.de/10.1594/PANGAEA.896422

Download

Article (2476 KB)
Full-text XML

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.