Articles | Volume 18, issue 16
Atmos. Chem. Phys., 18, 12413–12431, 2018
Atmos. Chem. Phys., 18, 12413–12431, 2018

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 et al.


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Anna Wenzel on behalf of the Authors (13 Jun 2018)  Author's response
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
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.
Final-revised paper