Evidence for pyrazine-based chromophores in cloud water mimics containing methylglyoxal and ammonium sulfate

Hawkins, Lelia Nahid; Welsh, Hannah G.; Alexander, Matthew V.

doi:https://doi.org/10.5194/acp-18-12413-2018

Articles | Volume 18, issue 16

https://doi.org/10.5194/acp-18-12413-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-12413-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 16

Research article

|

28 Aug 2018

Research article |

| 28 Aug 2018

Evidence for pyrazine-based chromophores in cloud water mimics containing methylglyoxal and ammonium sulfate

Lelia Nahid Hawkins, Hannah G. Welsh, and Matthew V. Alexander

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Final revised paper (published on 28 Aug 2018)
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Preprint (discussion started on 07 Feb 2018)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Review of Hawkins et al.', Anonymous Referee #1, 17 Apr 2018
- AC1: 'Author response to RC1', Lelia Hawkins, 22 Apr 2018
RC2: 'Review for Hawkins et al.', Anonymous Referee #4, 13 May 2018
- AC2: 'Author response to RC2', Lelia Hawkins, 15 May 2018

Peer-review completion

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

AR by Lelia Hawkins on behalf of the Authors (10 Jun 2018) Manuscript

ED: Referee Nomination & Report Request started (02 Jul 2018) by Alexander Laskin

RR by Anonymous Referee #1 (16 Jul 2018)

ED: Publish as is (05 Aug 2018) by Alexander Laskin

AR by Lelia Hawkins on behalf of the Authors (11 Aug 2018)

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Short summary

Atmospheric reactions can change the color of particles; this has implications for global climate. We present evidence of pyrazine compounds in cloud water mimics. We measured changes in brownness and composition during evaporation and acidity changes to understand the importance of the new compounds because the reactions parallel browning in foods. Drying favors browning and pyrazine formation, while acidity favors only pyrazine formation. Even acidic cloud water, when dried, produce pyrazines.