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| Titel |
The SOA/VOC/NOx system: an explicit model of secondary organic aerosol formation |
| VerfasserIn |
M. Camredon, B. Aumont, J. Lee-Taylor, S. Madronich |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 7, no. 21 ; Nr. 7, no. 21 (2007-11-13), S.5599-5610 |
| Datensatznummer |
250005248
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| Publikation (Nr.) |
 copernicus.org/acp-7-5599-2007.pdf |
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| Zusammenfassung |
| Our current understanding of secondary organic aerosol (SOA) formation is
limited by our knowledge of gaseous secondary organics involved in
gas/particle partitioning. The objective of this study is to explore (i) the
potential for products of multiple oxidation steps contributing to SOA, and
(ii) the evolution of the SOA/VOC/NOx system. We developed an
explicit model based on the coupling of detailed gas-phase oxidation schemes
with a thermodynamic condensation module. Such a model allows prediction of
SOA mass and speciation on the basis of first principles. The
SOA/VOC/NOx system is studied for the oxidation of 1-octene under
atmospherically relevant concentrations. In this study, gaseous oxidation of
octene is simulated to lead to SOA formation. Contributors to SOA formation
are shown to be formed via multiple oxidation steps of the parent
hydrocarbon. The behaviour of the SOA/VOC/NOx system simulated using
the explicit model agrees with general tendencies observed during laboratory
chamber experiments. This explicit modelling of SOA formation appears as a
useful exploratory tool to (i) support interpretations of SOA formation
observed in laboratory chamber experiments, (ii) give some insights on SOA
formation under atmospherically relevant conditions and (iii) investigate
implications for the regional/global lifetimes of the SOA. |
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