Articles | Volume 18, issue 23
Atmos. Chem. Phys., 18, 17307–17323, 2018
https://doi.org/10.5194/acp-18-17307-2018
Atmos. Chem. Phys., 18, 17307–17323, 2018
https://doi.org/10.5194/acp-18-17307-2018

Research article 06 Dec 2018

Research article | 06 Dec 2018

The underappreciated role of nonvolatile cations in aerosol ammonium-sulfate molar ratios

Hongyu Guo et al.

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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 Athanasios Nenes on behalf of the Authors (14 Jan 2018)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (31 Jan 2018) by Hang Su
RR by Anonymous Referee #1 (22 Feb 2018)
RR by Anonymous Referee #3 (26 Feb 2018)
RR by Anonymous Referee #2 (12 Mar 2018)
ED: Reconsider after major revisions (17 Mar 2018) by Hang Su
AR by Lorena Grabowski on behalf of the Authors (15 Jun 2018)  Author's response
ED: Referee Nomination & Report Request started (19 Jun 2018) by Hang Su
RR by Anonymous Referee #2 (06 Oct 2018)
ED: Publish subject to technical corrections (17 Oct 2018) by Hang Su
AR by Athanasios Nenes on behalf of the Authors (26 Oct 2018)  Author's response    Manuscript
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Short summary
Overprediction of fine-particle ammonium-sulfate molar ratios (R) by thermodynamic models is suggested as evidence for organic aerosol limiting the condensation of ammonia onto particles, with significant impacts on aerosol chemistry. We find that the effects of small amounts of salt and dust, combined with measurement artifacts, explain the discrepancy in R. These results are highly insensitive to mixing state. This means that aerosol predictions are much more robust than thought before.
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