Articles | Volume 16, issue 17
Atmos. Chem. Phys., 16, 11163–11176, 2016
https://doi.org/10.5194/acp-16-11163-2016
Atmos. Chem. Phys., 16, 11163–11176, 2016
https://doi.org/10.5194/acp-16-11163-2016

Research article 09 Sep 2016

Research article | 09 Sep 2016

Phase state of ambient aerosol linked with water uptake and chemical aging in the southeastern US

Aki Pajunoja et al.

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Short summary
The phase state of ambient particles was inferred from bounce measurements conducted at a rural site in central Alabama during the SOAS campaign. The organic-dominated ambient particles are mostly in the liquid phase at summertime conditions but they turn semisolid when dried in the measurement setup. Bounce humidograms reveal that the hygroscopicity and oxidation of the particles decreases the liquefying RH. The effect of oxidation is emphasized by oxidation flow reactor measurements.
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