Articles | Volume 18, issue 1
Atmos. Chem. Phys., 18, 357–370, 2018
https://doi.org/10.5194/acp-18-357-2018
Atmos. Chem. Phys., 18, 357–370, 2018
https://doi.org/10.5194/acp-18-357-2018
Research article
12 Jan 2018
Research article | 12 Jan 2018

Coupling of organic and inorganic aerosol systems and the effect on gas–particle partitioning in the southeastern US

Havala O. T. Pye et al.

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Cited articles

Allen, H. M., Draper, D. C., Ayres, B. R., Ault, A., Bondy, A., Takahama, S., Modini, R. L., Baumann, K., Edgerton, E., Knote, C., Laskin, A., Wang, B., and Fry, J. L.: Influence of crustal dust and sea spray supermicron particle concentrations and acidity on inorganic NO3 aerosol during the 2013 Southern Oxidant and Aerosol Study, Atmos. Chem. Phys., 15, 10669–10685, https://doi.org/10.5194/acp-15-10669-2015, 2015.
Appel, K. W., Pouliot, G. A., Simon, H., Sarwar, G., Pye, H. O. T., Napelenok, S. L., Akhtar, F., and Roselle, S. J.: Evaluation of dust and trace metal estimates from the Community Multiscale Air Quality (CMAQ) model version 5.0, Geosci. Model Dev., 6, 883–899, https://doi.org/10.5194/gmd-6-883-2013, 2013.
Benner, C. L., Eatough, D. J., Eatough, N. L., and Bhardwaja, P.: Comparison of annular denuder and filter pack collection of HNO3(g), HNO2(g), SO2(g), and particulate-phase nitrate, nitrite and sulfate in the south-west desert, Atmos. Environ., 25, 1537–1545, https://doi.org/10.1016/0960-1686(91)90013-W, 1991.
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Thermodynamic modeling revealed that some but not all measurements of ammonium-to-sulfate ratios are consistent with theory. The measurement diversity likely explains the previously reported range of results regarding the suitability of thermodynamic modeling. Despite particles being predominantly phase separated, organic–inorganic interactions resulted in increased aerosol pH and partitioning towards the particle phase for highly oxygenated organic compounds compared to traditional methods.
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