Glyoxal's impact on dry ammonium salts: fast and reversible surface aerosol browning

De Haan, David O.; Hawkins, Lelia N.; Jansen, Kevin; Welsh, Hannah G.; Pednekar, Raunak; de Loera, Alexia; Jimenez, Natalie G.; Tolbert, Margaret A.; Cazaunau, Mathieu; Gratien, Aline; Bergé, Antonin; Pangui, Edouard; Formenti, Paola; Doussin, Jean-François

doi:https://doi.org/10.5194/acp-20-9581-2020

Articles | Volume 20, issue 16

https://doi.org/10.5194/acp-20-9581-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Simulation chambers as tools in atmospheric research (AMT/ACP/GMD...

https://doi.org/10.5194/acp-20-9581-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 16

Research article

|

17 Aug 2020

Research article |

| 17 Aug 2020

Glyoxal's impact on dry ammonium salts: fast and reversible surface aerosol browning

David O. De Haan, Lelia N. Hawkins, Kevin Jansen, Hannah G. Welsh, Raunak Pednekar, Alexia de Loera, Natalie G. Jimenez, Margaret A. Tolbert, Mathieu Cazaunau, Aline Gratien, Antonin Bergé, Edouard Pangui, Paola Formenti, and Jean-François Doussin

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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of acp-2020-203', Anonymous Referee #1, 31 Mar 2020
RC2: 'Referee Comment #2', Anonymous Referee #2, 19 Apr 2020
RC3: 'Reviewer #3 review of ACP-2020-203', Anonymous Referee #3, 19 Apr 2020
AC1: 'Author responses to reviewers' comments', David De Haan, 10 Jun 2020

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AR: Author's response | RR: Referee report | ED: Editor decision

AR by David De Haan on behalf of the Authors (10 Jun 2020) Author's response Manuscript

ED: Publish as is (22 Jun 2020) by Christian George

AR by David De Haan on behalf of the Authors (24 Jun 2020) Manuscript

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Short summary

When exposed to glyoxal in chamber experiments, dry ammonium or methylammonium sulfate particles turn brown immediately and reversibly without increasing in size. Much less browning was observed on wet aerosol particles, and no browning was observed with sodium sulfate aerosol. While estimated dry aerosol light absorption caused by background glyoxal (70 ppt) is insignificant compared to that of secondary brown carbon overall, in polluted regions this process could be a source of brown carbon.