Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11266
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dc.contributorDepartment of Civil and Environmental Engineering-
dc.creatorXing, L-
dc.creatorFu, T-
dc.creatorCao, JJ-
dc.creatorLee, SC-
dc.creatorWang, GH-
dc.creatorHo, KF-
dc.creatorCheng, M-
dc.creatorYou, C-
dc.creatorWang, TJ-
dc.date.accessioned2015-05-26T08:13:37Z-
dc.date.available2015-05-26T08:13:37Z-
dc.identifier.issn1680-7316en_US
dc.identifier.urihttp://hdl.handle.net/10397/11266-
dc.language.isoenen_US
dc.publisherCopernicus GmbHen_US
dc.rights© Author(s) 2013. This is an open access article distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rightsThe following publication: Xing, L., Fu, T.-M., Cao, J. J., Lee, S. C., Wang, G. H., Ho, K. F., Cheng, M.-C., You, C.-F., and Wang, T. J.: Seasonal and spatial variability of the OM/OC mass ratios and high regional correlation between oxalic acid and zinc in Chinese urban organic aerosols, Atmos. Chem. Phys., 13, 4307-4318 is available at https://doi.org/10.5194/acp-13-4307-2013, 2013.en_US
dc.titleSeasonal and spatial variability of the OM/OC mass ratios and high regional correlation between oxalic acid and zinc in Chinese urban organic aerosolsen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage4307en_US
dc.identifier.epage4318en_US
dc.identifier.volume13en_US
dc.identifier.issue8en_US
dc.identifier.doi10.5194/acp-13-4307-2013en_US
dcterms.abstractWe calculated the organic matter to organic carbon mass ratios (OM/OC mass ratios) in PM2.5 collected from 14 Chinese cities during summer and winter of 2003 and analyzed the causes for their seasonal and spatial variability. The OM/OC mass ratios were calculated two ways. Using a mass balance method, the calculated OM/OC mass ratios averaged 1.92+/-0.39 year-round, with no significant seasonal or spatial variation. The second calculation was based on chemical species analyses of the organic compounds extracted from the PM2.5 samples using dichloromethane/methanol and water. The calculated OM/OC mass ratio in summer was relatively high (1.75+/-0.13) and spatially-invariant due to vigorous photochemistry and secondary organic aerosol (OA) production throughout the country. The calculated OM/OC mass ratio in winter (1.59+/-0.18) was significantly lower than that in summer, with lower values in northern cities (1.51+/-0.07) than in southern cities (1.65+/-0.15). This likely reflects the wider usage of coal for heating purposes in northern China in winter, in contrast to the larger contributions from biofuel and biomass burning in southern China in winter. On average, organic matter constituted 36 % and 34 % of Chinese urban PM2.5 mass in summer and winter, respectively. We report, for the first time, a high regional correlation between Zn and oxalic acid in Chinese urban aerosols in summer. This is consistent with the formation of stable Zn oxalate complex in the aerosol phase previously proposed by Furukawa and Takahashi (2011). We found that many other dicarboxylic acids were also highly correlated with Zn in the summer Chinese urban aerosol samples, suggesting that they may also form stable organic complexes with Zn. Such formation may have profound implications for the atmospheric abundance and hygroscopic properties of aerosol dicarboxylic acids.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationAtmospheric chemistry and physics, 2013, v. 13, no. 8, p. 4307-4318-
dcterms.isPartOfAtmospheric chemistry and physics-
dcterms.issued2013-
dc.identifier.isiWOS:000318428300023-
dc.identifier.eissn1680-7324en_US
dc.identifier.rosgroupidr65256-
dc.description.ros2012-2013 > Academic research: refereed > Publication in refereed journalen_US
dc.description.validate201811_a bcmaen_US
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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