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dc.contributor.authorMoffet, Ryan C.
dc.contributor.authorAlpert, Peter A.
dc.contributor.authorKelly, Stephen T.
dc.contributor.authorPham, Don Q.
dc.contributor.authorGilles, Mary K.
dc.contributor.authorKnopf, Daniel A.
dc.contributor.authorLaskin, Alexander
dc.contributor.authorSellon, Rachel E.
dc.date.accessioned2017-05-22T15:53:57Z
dc.date.available2017-05-22T15:53:57Z
dc.date.issued2016-11
dc.date.submitted2016-10
dc.identifier.issn1680-7324
dc.identifier.issn1680-7316
dc.identifier.urihttp://hdl.handle.net/1721.1/109252
dc.description.abstractAerosol absorption is strongly dependent on the internal heterogeneity (mixing state) and morphology of individual particles containing black carbon (BC) and other non-absorbing species. Here, we examine an extensive microscopic data set collected in the California Central Valley during the CARES 2010 field campaign. During a period of high photochemical activity and pollution buildup, the particle mixing state and morphology were characterized using scanning transmission X-ray microscopy (STXM) at the carbon K-edge. Observations of compacted BC core morphologies and thick organic coatings at both urban and rural sites provide evidence of the aged nature of particles, highlighting the importance of highly aged particles at urban sites during periods of high photochemical activity. Based on the observation of thick coatings and more convex BC inclusion morphology, either the aging was rapid or the contribution of fresh BC emissions at the urban site was relatively small compared to background concentrations. Most particles were observed to have the BC inclusion close to the center of the host. However, host particles containing inorganic rich inclusions had the BC inclusion closer to the edge of the particle. These measurements of BC morphology and mixing state provide important constraints for the morphological effects on BC optical properties expected in aged urban plumes.en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Atmospheric Radiation Measurement Programen_US
dc.description.sponsorshipUnited States. Dept. of Energy. Atmospheric System Research Program (DE-SC0008643)en_US
dc.description.sponsorshipUnited States. Dept. of Energy. Atmospheric System Research Program (DE-SC0008613)en_US
dc.language.isoen_US
dc.publisherCopernicus GmbHen_US
dc.relation.isversionofhttp://dx.doi.org/10.5194/acp-16-14515-2016en_US
dc.rightsCreative Commons Attribution 3.0 Licenseen_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.sourceCopernicus Publicationsen_US
dc.titleMorphology and mixing of black carbon particles collected in central California during the CARES field studyen_US
dc.typeArticleen_US
dc.identifier.citationMoffet, Ryan C. et al. “Morphology and Mixing of Black Carbon Particles Collected in Central California during the CARES Field Study.” Atmospheric Chemistry and Physics 16.22 (2016): 14515–14525.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Civil and Environmental Engineeringen_US
dc.contributor.mitauthorSellon, Rachel E.
dc.relation.journalAtmospheric Chemistry and Physicsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsMoffet, Ryan C.; O'Brien, Rachel E.; Alpert, Peter A.; Kelly, Stephen T.; Pham, Don Q.; Gilles, Mary K.; Knopf, Daniel A.; Laskin, Alexanderen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-0383-6909
mit.licensePUBLISHER_CCen_US


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