Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols-Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols
dc.bibliographicCitation.firstPage | 3775 | eng |
dc.bibliographicCitation.issue | 8 | eng |
dc.bibliographicCitation.volume | 10 | eng |
dc.contributor.author | Poulain, L. | |
dc.contributor.author | Wu, Z. | |
dc.contributor.author | Petters, M.D. | |
dc.contributor.author | Wex, H. | |
dc.contributor.author | Hallbauer, E. | |
dc.contributor.author | Wehner, B. | |
dc.contributor.author | Massling, A. | |
dc.contributor.author | Kreidenweis, S.M. | |
dc.contributor.author | Stratmann, F. | |
dc.date.accessioned | 2020-08-11T08:32:50Z | |
dc.date.available | 2020-08-11T08:32:50Z | |
dc.date.issued | 2010 | |
dc.description.abstract | The influence of varying levels of water mixing ratio,r during the formation of secondary organic aerosol (SOA) from the ozonolysis of α-pinene on the SOA hygroscopicity and volatility was investigated. The reaction proceeded and aerosols were generated in a mixing chamber and the hygroscopic characteristics of the SOA were determined with the Leipzig Aerosol Cloud Interaction Simulator (LACIS) and a Cloud Condensation Nuclei counter (CCNc). In parallel, a High-Resolution Time-of-Flight Aerodyne Aerosol Mass Spectrometer (HR-ToF-AMS) located downstream of a thermodenuder (TD) sampling from the mixing chamber, to collect mass spectra of particles from the volatile and less-volatile fractions of the SOA. Results showed that both hygroscopic growth and the volatile fraction of the SOA increased with increases in r inside the mixing chamber during SOA generation. An effective density of 1.40 g cm-3 was observed for the generated SOA when the reaction proceeded with <1 g kg-1. Changes in the concentrations of the fragment CO2+ and the sum of CxH+y(short name CHO) and CxH+y (short name CH) fragments as measured by the HR-ToF-AMS were used to estimate changes in the oxidation level of the SOA with reaction conditions, using the ratios CO2 + to CH and CHO to CH. Under humid conditions, both ratios increased, corresponding to the presence of more oxygenated functional groups (i.e., multifunctional carboxylic acids). This result is consistent with the α-pinene ozonolysis mechanisms which suggest that water interacts with the stabilized Criegee intermediate. The volatility and the hygroscopicity results show that SOA generation via ozonolysis of α-pinene in the presence of water vapour (r <16.9 g kg-1) leads to the formation of more highly oxygenated compounds that are more hygroscopic and more volatile than compounds formed under dry conditions. © 2010 Author(s). | eng |
dc.description.version | publishedVersion | eng |
dc.identifier.uri | https://doi.org/10.34657/4063 | |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/5434 | |
dc.language.iso | eng | eng |
dc.publisher | Göttingen : Copernicus | eng |
dc.relation.doi | https://doi.org/10.5194/acp-10-3775-2010 | |
dc.relation.ispartofseries | Atmospheric Chemistry and Physics 10 (2010), 8 | eng |
dc.relation.issn | 1680-7316 | |
dc.rights.license | CC BY 3.0 Unported | eng |
dc.rights.uri | https://creativecommons.org/licenses/by/3.0/ | eng |
dc.subject | aerosol | eng |
dc.subject | chemical composition | eng |
dc.subject | cloud condensation nucleus | eng |
dc.subject | hygroscopicity | eng |
dc.subject | mixing ratio | eng |
dc.subject | volatile element | eng |
dc.subject | water vapor | eng |
dc.subject.ddc | 540 | eng |
dc.title | Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols-Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols | eng |
dc.type | article | eng |
dc.type | Text | eng |
dcterms.bibliographicCitation.journalTitle | Atmospheric Chemistry and Physics | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | TROPOS | eng |
wgl.subject | Chemie | eng |
wgl.type | Zeitschriftenartikel | eng |
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