Quantification of black carbon mixing state from traffic: Implications for aerosol optical properties

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dc.contributor.authorWillis, Megan D.
dc.contributor.authorHealy, Robert M.
dc.contributor.authorRiemer, Nicole
dc.contributor.authorWest, Matthew
dc.contributor.authorWang, Jon M.
dc.contributor.authorJeong, Cheol-Heon
dc.contributor.authorWenger, John C.
dc.contributor.authorEvans, Greg J.
dc.contributor.authorAbbatt, Jonathan P. D.
dc.contributor.authorLee, Alex K. Y.
dc.contributor.funderNatural Sciences and Engineering Research Council of Canada
dc.contributor.funderEnvironment Canada
dc.contributor.funderCanada Foundation for Innovation
dc.contributor.funderU.S. Department of Energy
dc.contributor.funderFP7 People: Marie-Curie Actions
dc.date.accessioned2017-06-22T13:55:55Z
dc.date.available2017-06-22T13:55:55Z
dc.date.issued2016-04-14
dc.description.abstractThe climatic impacts of black carbon (BC) aerosol, an important absorber of solar radiation in the atmosphere, remain poorly constrained and are intimately related to its particle-scale physical and chemical properties. Using particle-resolved modelling informed by quantitative measurements from a soot-particle aerosol mass spectrometer, we confirm that the mixing state (the distribution of co-emitted aerosol amongst fresh BC-containing particles) at the time of emission significantly affects BC-aerosol optical properties even after a day of atmospheric processing. Both single particle and ensemble aerosol mass spectrometry observations indicate that BC near the point of emission co-exists with hydrocarbon-like organic aerosol (HOA) in two distinct particle types: HOA-rich and BC-rich particles. The average mass fraction of black carbon in HOA-rich and BC-rich particle classes was < 0.1 and 0.8, respectively. Notably, approximately 90 % of BC mass resides in BC-rich particles. This new measurement capability provides quantitative insight into the physical and chemical nature of BC-containing particles and is used to drive a particle-resolved aerosol box model. Significant differences in calculated single scattering albedo (an increase of 0.1) arise from accurate treatment of initial particle mixing state as compared to the assumption of uniform aerosol composition at the point of BC injection into the atmosphere.en
dc.description.sponsorshipU.S. Department of Energy (DOE DE-SC0011771)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationWillis, M. D., Healy, R. M., Riemer, N., West, M., Wang, J. M., Jeong, C. H., Wenger, J. C., Evans, G. J., Abbatt, J. P. D. and Lee, A. K. Y. (2016) 'Quantification of black carbon mixing state from traffic: implications for aerosol optical properties',Atmospheric Chemistry and Physics, 16, pp.4693-4706. doi: 10.5194/acp-16-4693-2016en
dc.identifier.doi10.5194/acp-16-4693-2016
dc.identifier.endpage4076
dc.identifier.issn1680-7324
dc.identifier.journaltitleAtmospheric Chemistry and Physicsen
dc.identifier.startpage4693
dc.identifier.urihttps://hdl.handle.net/10468/4179
dc.identifier.volume16
dc.language.isoenen
dc.publisherEuropean Geosciences Unionen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/299755/EU/Chemical and Optical Properties of Black Carbon Particles/CHEMBC
dc.relation.urihttp://www.atmos-chem-phys.net/16/4693/2016/
dc.rights© 2016, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License.en
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subjectBlack carbon mixingen
dc.subjectAerosol optical propertiesen
dc.titleQuantification of black carbon mixing state from traffic: Implications for aerosol optical propertiesen
dc.typeArticle (peer-reviewed)en
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