Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5595
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dc.contributorDepartment of Civil and Environmental Engineering-
dc.creatorCao, JJ-
dc.creatorLee, SC-
dc.creatorChow, JC-
dc.creatorWatson, JG-
dc.creatorHo, KF-
dc.creatorZhang, RJ-
dc.creatorJin, ZD-
dc.creatorShen, ZX-
dc.creatorChen, GC-
dc.creatorKang, YM-
dc.creatorZou, SC-
dc.creatorZhang, LZ-
dc.creatorQi, SH-
dc.creatorDai, MH-
dc.creatorCheng, Y-
dc.creatorHu, K-
dc.date.accessioned2014-12-11T08:28:41Z-
dc.date.available2014-12-11T08:28:41Z-
dc.identifier.issn2169-897X-
dc.identifier.urihttp://hdl.handle.net/10397/5595-
dc.language.isoenen_US
dc.publisherWiley-Blackwellen_US
dc.rightsCopyright 2007 by the American Geophysical Unionen_US
dc.subjectAerosolen_US
dc.subjectAerosol compositionen_US
dc.subjectOrganic carbonen_US
dc.subjectSeasonal variationen_US
dc.subjectSpatial distributionen_US
dc.titleSpatial and seasonal distributions of carbonaceous aerosols over China en_US
dc.typeJournal/Magazine Articleen_US
dc.description.otherinformationAuthor name used in this publication: S. C. Leeen_US
dc.description.otherinformationAuthor name used in this publication: S. H. Qien_US
dc.identifier.spage1-
dc.identifier.epage9-
dc.identifier.volume112-
dc.identifier.issueD22-
dc.identifier.doi10.1029/2006JD008205-
dcterms.abstractSimultaneous measurements of atmospheric organic and elemental carbon (OC and EC) were taken during winter and summer seasons at 2003 in 14 cities in China. Daily PM₂.₅ samples were analyzed for OC and EC by the Interagency Monitoring of Protected Visual Environments (IMPROVE) thermal/optical reflectance protocol. Average PM₂.₅ OC concentrations in the 14 cities were 38.1 μg m⁻³ and 13.8 μg m⁻³ for winter and summer periods, and the corresponding EC were 9.9 μg m⁻³ and 3.6 μg m⁻³, respectively. OC and EC concentrations had summer minima and winter maxima in all the cities. Carbonaceous matter (CM), the sum of organic matter (OM = 1.6 × OC) and EC, contributed 44.2% to PM₂.₅ in winter and 38.8% in summer. OC was correlated with EC (R²: 0.56–0.99) in winter, but correlation coefficients were lower in summer (R²: 0.003–0.90). Using OC/EC enrichment factors, the primary OC, secondary OC and EC accounted for 47.5%, 31.7% and 20.8%, respectively, of total carbon in Chinese urban environments. More than two thirds of China's urban carbon is derived from directly emitted particles. Average OC/EC ratios ranged from 2.0 to 4.7 among 14 cities during winter and from 2.1 to 5.9 during summer. OC/EC ratios in this study were consistent with a possible cooling effect of carbonaceous aerosols over China.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationJournal of geophysical research. Atmospheres, Nov. 2007, v. 112, no. D22, D22S11, p.1-9-
dcterms.isPartOfJournal of geophysical research. Atmospheres-
dcterms.issued2007-11-
dc.identifier.isiWOS:000250851900001-
dc.identifier.scopus2-s2.0-38349163350-
dc.identifier.eissn2169-8996-
dc.identifier.rosgroupidr37571-
dc.description.ros2007-2008 > Academic research: refereed > Publication in refereed journal-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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