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New particle formation during α- and β-pinene oxidation by O3, OH and NO3, and the influence of water vapour: particle size distribution studies

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons100857

Bonn,  B.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons101144

Moortgat,  G. K.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

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Zitation

Bonn, B., & Moortgat, G. K. (2002). New particle formation during α- and β-pinene oxidation by O3, OH and NO3, and the influence of water vapour: particle size distribution studies. Atmospheric Chemistry and Physics, 2, 183-196.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-90D4-8
Zusammenfassung
New particle formation during the oxidation of alpha- and beta- pinene (C10H16) by ozone, OH and NO3 was studied by measuring the particle size distributions with a scanning mobility particle sizer (TSI 3936). The results indicate a drastically higher nucleation potential of the ozonolysis than in the reaction with either OH or NO3. On the contrary, the contribution of the individual oxidation reactions to form new aerosol volume was found to depend on the location of the carbon double bond to be oxidised: for the endocyclic alpha- pinene reactions the ozonolysis contributed mostly to the aerosol volume yield, whereas for the exocyclic beta-pinene reactions the oxidation by O-3, OH and NO3 yielded a similar aerosol volume. In a second part of this study the influence of water vapour on the nucleation in all three possible oxidation routes was examined. The observations revealed only an effect of water vapour during the ozonolysis reactions.