Articles | Volume 17, issue 10
https://doi.org/10.5194/acp-17-6373-2017
https://doi.org/10.5194/acp-17-6373-2017
Research article
 | 
29 May 2017
Research article |  | 29 May 2017

Chemical and isotopic composition of secondary organic aerosol generated by α-pinene ozonolysis

Carl Meusinger, Ulrike Dusek, Stephanie M. King, Rupert Holzinger, Thomas Rosenørn, Peter Sperlich, Maxime Julien, Gerald S. Remaud, Merete Bilde, Thomas Röckmann, and Matthew S. Johnson

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Short summary
Isotope studies can constrain budgets of secondary organic aerosol (SOA) that is pivotal to air pollution and climate. SOA from α-pinene ozonolysis was found to be enriched in 13C relative to the precursor. The observed difference in 13C between the gas and particle phases may arise from isotope-dependent changes in branching ratios. Alternatively, some gas-phase products involve carbon atoms from highly enriched and depleted sites, giving a non-kinetic origin to the observed fractionations.
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