Articles | Volume 18, issue 23
https://doi.org/10.5194/acp-18-17307-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-18-17307-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
The underappreciated role of nonvolatile cations in aerosol ammonium-sulfate molar ratios
Hongyu Guo
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, GA 30332, USA
Athanasios Nenes
CORRESPONDING AUTHOR
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, GA 30332, USA
School of Chemical and Biomolecular Engineering, Georgia Institute
of Technology, Atlanta, GA 30332, USA
Institute for Chemical Engineering Sciences, Foundation for
Research and Technology – Hellas, Patras, 26504, Greece
Institute for Environmental Research and Sustainable Development,
National Observatory of Athens, P. Penteli, Athens, 15236, Greece
Laboratory of Atmospheric Processes and Their Impacts, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Switzerland, Lausanne, 1015, Switzerland
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, GA 30332, USA
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Latest update: 20 Nov 2024
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.
Overprediction of fine-particle ammonium-sulfate molar ratios (R) by thermodynamic models is...
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