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

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dc.contributor.author Willis, Megan D.
dc.contributor.author Healy, Robert M.
dc.contributor.author Riemer, Nicole
dc.contributor.author West, Matthew
dc.contributor.author Wang, Jon M.
dc.contributor.author Jeong, Cheol-Heon
dc.contributor.author Wenger, John C.
dc.contributor.author Evans, Greg J.
dc.contributor.author Abbatt, Jonathan P. D.
dc.contributor.author Lee, Alex K. Y.
dc.date.accessioned 2017-06-22T13:55:55Z
dc.date.available 2017-06-22T13:55:55Z
dc.date.issued 2016-04-14
dc.identifier.citation Willis, 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-16-4693-2016 en
dc.identifier.volume 16
dc.identifier.startpage 4693
dc.identifier.endpage 4076
dc.identifier.issn 1680-7324
dc.identifier.uri http://hdl.handle.net/10468/4179
dc.identifier.doi 10.5194/acp-16-4693-2016
dc.description.abstract The 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.sponsorship U.S. Department of Energy (DOE DE-SC0011771) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher European Geosciences Union en
dc.relation.uri http://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.uri https://creativecommons.org/licenses/by/3.0/ en
dc.subject Black carbon mixing en
dc.subject Aerosol optical properties en
dc.title Quantification of black carbon mixing state from traffic: Implications for aerosol optical properties en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Robert M. Healy, Chemistry and Environmental Research Institute, University College Cork, Cork, Ireland. +353-21-490-3000 Email: robert.healy@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Natural Sciences and Engineering Research Council of Canada
dc.contributor.funder Environment Canada
dc.contributor.funder Canada Foundation for Innovation
dc.contributor.funder U.S. Department of Energy
dc.contributor.funder FP7 People: Marie-Curie Actions
dc.description.status Peer reviewed en
dc.identifier.journaltitle Atmospheric Chemistry and Physics en
dc.internal.IRISemailaddress robert.healy@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/299755/EU/Chemical and Optical Properties of Black Carbon Particles/CHEMBC


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© 2016, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Except where otherwise noted, this item's license is described as © 2016, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License.
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