Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Atmos. Chem. Phys., 17, 5107-5118, 2017
http://www.atmos-chem-phys.net/17/5107/2017/
doi:10.5194/acp-17-5107-2017
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
19 Apr 2017
Inconsistency of ammonium–sulfate aerosol ratios with thermodynamic models in the eastern US: a possible role of organic aerosol
Rachel F. Silvern et al.
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Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'use of molar ratios to predict particle pH and its effects', Anonymous Referee #1, 05 Jul 2016 Printer-friendly Version 
AC1: 'Response to Referee Comment', Rachel Silvern, 08 Jul 2016 Printer-friendly Version 
 
RC2: 'Review of Silvern et al.', Anonymous Referee #2, 16 Jul 2016 Printer-friendly Version 
 
AC2: 'Response to Reviewers', Rachel Silvern, 26 Sep 2016 Printer-friendly Version Supplement 
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision
AR by Rachel Silvern on behalf of the Authors (26 Sep 2016)  Author's response  Manuscript
ED: Referee Nomination & Report Request started (12 Dec 2016) by Athanasios Nenes
RR by Anonymous Referee #1 (26 Dec 2016)  
ED: Reconsider after minor revisions (Editor review) (01 Feb 2017) by Athanasios Nenes  
AR by Rachel Silvern on behalf of the Authors (16 Feb 2017)  Author's response  Manuscript
ED: Publish as is (22 Mar 2017) by Athanasios Nenes
Publications Copernicus
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Short summary
We identify a fundamental discrepancy between thermodynamic equilibrium theory and observations of inorganic aerosol composition in the eastern US in summer that shows low ammonium sulfate aerosol ratios. In addition, from 2003 to 2013, while SO2 emissions have declined due to US emission controls, aerosols have become more acidic in the southeastern US. To explain these observations, we suggest that the large and increasing source of organic aerosol may be affecting thermodynamic equilibrium.
We identify a fundamental discrepancy between thermodynamic equilibrium theory and observations...
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