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Title:Distribution of gaseous and particulate organic composition during dark α-pinene ozonolysis
Authors:ID Camredon, Marie, School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom (Author)
ID Hamilton, Jacqueline F, Department of Chemistry, University of York, York, YO10 5DD, United Kingdom (Author)
ID Alam, Mohammed S, School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom (Author)
ID Wyche, Kevin P, Department of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom (Author)
ID Carr, Timo, Department of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom (Author)
ID White, Iain R., Department of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom (Author)
ID Monks, Paul S, Department of Chemistry, University of Leicester, Leicester, LE1 7RH, United Kingdom (Author)
ID Rickard, Andrew R, National Centre for Atmospheric Science, School of Chemistry, University of Leeds, Leeds, LS2 9JT, United Kingdom (Author)
ID Bloss, William J, School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Secondary Organic Aerosol (SOA) affects atmospheric composition, air quality and radiative transfer, however major difficulties are encountered in the development of reliable models for SOA formation. Constraints on processes involved in SOA formation can be obtained by interpreting the speciation and evolution of organics in the gaseous and condensed phase simultaneously. In this study we investigate SOA formation from dark α-pinene ozonolysis with particular emphasis upon the mass distribution of gaseous and particulate organic species. A detailed model for SOA formation is compared with the results from experiments performed in the EUropean PHOtoREactor (EUPHORE) simulation chamber, including on-line gas-phase composition obtained from Chemical-Ionization-Reaction Time-Of-Flight Mass-Spectrometry measurements, and off-line analysis of SOA samples performed by Ion Trap Mass Spectrometry and Liquid Chromatography. The temporal profile of SOA mass concentration is relatively well reproduced by the model. Sensitivity analysis highlights the importance of the choice of vapour pressure estimation method, and the potential influence of condensed phase chemistry. Comparisons of the simulated gaseous-and condensed-phase mass distributions with those observed show a generally good agreement. The simulated speciation has been used to (i) propose a chemical structure for the principal gaseous semi-volatile organic compounds and condensed monomer organic species, (ii) provide evidence for the occurrence of recently suggested radical isomerisation channels not included in the basic model, and (iii) explore the possible contribution of a range of accretion reactions occurring in the condensed phase. We find that oligomer formation through esterification reactions gives the best agreement between the observed and simulated mass spectra
Keywords:Aerosol, Aerosol formation, Smog chamber
Year of publishing:2010
Number of pages:2893-2917
Numbering:6, 10
PID:20.500.12556/RUNG-4633-84248036-9788-a675-55aa-837917e7be92 New window
COBISS.SI-ID:5417979 New window
DOI:10.5194/acp-10-2893-2010 New window
NUK URN:URN:SI:UNG:REP:M7BLYEWZ
Publication date in RUNG:18.07.2019
Views:3004
Downloads:0
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Record is a part of a journal

Title:Atmospheric Chemistry and Physics
Shortened title:Atmos. Chem. Phys.
Publisher:Copernicus
Year of publishing:2010
ISSN:16807316

Licences

License:CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-sa/4.0/
Description:This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.
Licensing start date:17.07.2019

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