Articles | Volume 20, issue 22
Atmos. Chem. Phys., 20, 14393–14405, 2020
https://doi.org/10.5194/acp-20-14393-2020
Atmos. Chem. Phys., 20, 14393–14405, 2020
https://doi.org/10.5194/acp-20-14393-2020

Research article 27 Nov 2020

Research article | 27 Nov 2020

Direct contribution of ammonia to α-pinene secondary organic aerosol formation

Liqing Hao et al.

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Cited articles

Alfarra, R.: Insights Into Atmospheric Organic Aerosols Using An Aerosol Mass Spectrometer, PhD thesis, University of Manchester, 2004. 
Babar, Z. B., Park, J., and Lim, H.: Influence of NH3 on secondary organic aerosols from the ozonolysis and photooxidation of a-pinene in a flow reactor, Atmos. Environ., 164, 71–84, 2017. 
Barsanti, K. C., McMurry, P. H., and Smith, J. N.: The potential contribution of organic salts to new particle growth, Atmos. Chem. Phys., 9, 2949–2957, https://doi.org/10.5194/acp-9-2949-2009, 2009. 
Battye, W., Aneja, V. P., and Roelle, P. A.: Evaluation and improvement of ammonia emission inventories, Atmos. Environ., 37, 3873–3883, 2003. 
Becker, B. and Davidson, A. W.: the systems formic acid-ammonia and propionic acid-ammonia, J. Am. Chem. Soc., 85, 57–159, https://doi.org/10.1021/ja00885a010, 1963. 
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Short summary
Our work presents the observational results of secondary organic aerosol (SOA) formation in the presence of ammonia. The particle-phase ammonium was continuously produced even after SOA formation had ceased. The gas-phase organic acids were observed to contribute to the formed particle-phase ammonium salts. This study suggests that the presence of ammonia may change the mass and chemical composition of large-size SOA particles and can potentially alter the aerosol impact on climate change.
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