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Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests

dc.contributor.authorSlowik, J. G.en_US
dc.contributor.authorStroud, C.en_US
dc.contributor.authorBottenheim, J. W.en_US
dc.contributor.authorBrickell, P. C.en_US
dc.contributor.authorChang, R. Y. -Wen_US
dc.contributor.authorLiggio, J.en_US
dc.contributor.authorMakar, P. A.en_US
dc.contributor.authorMartin, R. V.en_US
dc.contributor.authorMoran, M. D.en_US
dc.contributor.authorShantz, N. C.en_US
dc.contributor.authorSjostedt, S. J.en_US
dc.contributor.authorvan Donkelaar, A.en_US
dc.contributor.authorVlasenko, A.en_US
dc.contributor.authorWiebe, H. A.en_US
dc.contributor.authorXia, A. G.en_US
dc.contributor.authorZhang, J.en_US
dc.contributor.authorLeaitch, W. R.en_US
dc.contributor.authorAbbatt, J. P. D.en_US
dc.date.accessioned2014-02-24T16:50:08Z
dc.date.available2014-02-24T16:50:08Z
dc.date.issued2010en_US
dc.description.abstractMeasurements of aerosol composition, volatile organic compounds, and CO are used to determine biogenic secondary organic aerosol (SOA) concentrations at a rural site 70 km north of Toronto. These biogenic SOA levels are many times higher than past observations and occur during a period of increasing temperatures and outflow from Northern Ontario and Quebec forests in early summer. A regional chemical transport model approximately predicts the event timing and accurately predicts the aerosol loading, identifying the precursors as monoterpene emissions from the coniferous forest. The agreement between the measured and modeled biogenic aerosol concentrations contrasts with model underpredictions for polluted regions. Correlations of the oxygenated organic aerosol mass with tracers such as CO support a secondary aerosol source and distinguish biogenic, pollution, and biomass burning periods during the field campaign. Using the Master Chemical Mechanism, it is shown that the levels of CO observed during the biogenic event are consistent with a photochemical source arising from monoterpene oxidation. The biogenic aerosol mass correlates with satellite measurements of regional aerosol optical depth, indicating that the event extends across the eastern Canadian forest. This regional event correlates with increased temperatures, indicating that temperature-dependent forest emissions can significantly affect climate through enhanced direct optical scattering and higher cloud condensation nuclei numbers.en_US
dc.identifier.citationSlowik, J. G., C. Stroud, J. W. Bottenheim, P. C. Brickell, et al. 2010. "Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests." Atmospheric Chemistry and Physics 10(6): 2825-2845.en_US
dc.identifier.issn1680-7316en_US
dc.identifier.issue6en_US
dc.identifier.startpage2825en_US
dc.identifier.urihttp://hdl.handle.net/10222/44544
dc.identifier.urihttp://dx.doi.org/10.5194/acp-10-2825-2010
dc.identifier.volume10en_US
dc.relation.ispartofAtmospheric Chemistry and Physicsen_US
dc.titleCharacterization of a large biogenic secondary organic aerosol event from eastern Canadian forestsen_US
dc.typearticleen_US

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