Articles | Volume 16, issue 13
https://doi.org/10.5194/acp-16-8095-2016
https://doi.org/10.5194/acp-16-8095-2016
Research article
 | 
04 Jul 2016
Research article |  | 04 Jul 2016

Evidence for ambient dark aqueous SOA formation in the Po Valley, Italy

Amy P. Sullivan, Natasha Hodas, Barbara J. Turpin, Kate Skog, Frank N. Keutsch, Stefania Gilardoni, Marco Paglione, Matteo Rinaldi, Stefano Decesari, Maria Cristina Facchini, Laurent Poulain, Hartmut Herrmann, Alfred Wiedensohler, Eiko Nemitz, Marsailidh M. Twigg, and Jeffrey L. Collett Jr.

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Cited articles

Altieri, K. E., Carlton, A. G., Lim, H.-J., Turpin, B. J., and Seitzinger, S. P.: Evidence for oligomer formation in clouds: Reactions of isoprene oxidation products, Environ. Sci. Technol., 40, 4956–4960, 2006.
Altieri, K., Seitzinger, S. P., Carlton, A. G., Turpin B. J., Klein, G. C., and Marshall, A. G.: Oligomers formed through in-cloud methylglyoxal reactions: Chemical composition, properties, and mechanisms investigated by ultra-high resolution FT-ICR Mass Spectrometry, Atmos. Environ., 42, 1476–1490, 2008.
Blando, J. D. and Turpin, B. J.: Secondary Organic Aerosol Formation in Cloud and Fog Droplets: A Literature Evaluation of Plausibility, Atmos. Environ., 34, 1623–1632, 2000.
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This paper presents the results from our measurements and approach for the investigation of aqueous secondary organic aerosol (aqSOA) formation in the ambient atmosphere. When local aqSOA formation was observed, a correlation of water-soluble organic carbon with organic aerosol, aerosol liquid water, relative humidity, and aerosol nitrate was found. Key factors of local aqSOA production include air mass stagnation, formation of local nitrate overnight, and significant amounts of ammonia.
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