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| Titel |
Modelling the contribution of biogenic volatile organic compounds to new particle formation in the Jülich plant atmosphere chamber |
| VerfasserIn |
P. Roldin, L. Liao, D. Mogensen, M. Dal Maso, A. Rusanen, V.-M. Kerminen, T. F. Mentel, J. Wildt, E. Kleist, A. Kiendler-Scharr, R. Tillmann, M. Ehn, M. Kulmala  , M. Boy |
| 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 ; 15, no. 18 ; Nr. 15, no. 18 (2015-09-28), S.10777-10798 |
| Datensatznummer |
250120060
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| Publikation (Nr.) |
 copernicus.org/acp-15-10777-2015.pdf |
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| Zusammenfassung |
| We used the Aerosol Dynamics gas- and particle-phase chemistry model for
laboratory CHAMber studies (ADCHAM) to simulate the contribution of BVOC
plant emissions to the observed new particle formation during photooxidation
experiments performed in the Jülich Plant-Atmosphere
Chamber and to evaluate how well smog chamber experiments can mimic the
atmospheric conditions during new particle formation events. ADCHAM couples
the detailed gas-phase chemistry from Master Chemical Mechanism with a novel
aerosol dynamics and particle phase chemistry module. Our model simulations
reveal that the observed particle growth may have either been controlled by
the formation rate of semi- and low-volatility organic compounds in the
gas phase or by acid catalysed heterogeneous reactions between
semi-volatility organic compounds in the particle surface layer (e.g.
peroxyhemiacetal dimer formation). The contribution of extremely
low-volatility organic gas-phase compounds to the particle formation and
growth was suppressed because of their rapid and irreversible wall losses,
which decreased their contribution to the nano-CN formation and growth
compared to the atmospheric situation. The best agreement between the
modelled and measured total particle number concentration (R2 > 0.95)
was achieved if the nano-CN was formed by kinetic nucleation involving both
sulphuric acid and organic compounds formed from OH oxidation of BVOCs. |
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