title: Source contributions to carbonaceous species in PM₂.₅ and their uncertainty analysis at typical urban, peri-urban and background sites in southeast China.
abstract: Determination of (14)C and levoglucosan can provide insights into the quantification of source contributions to carbonaceous aerosols, yet there is still uncertainty on the partitioning of organic carbon (OC) into biomass burning OC (OCbb) and biogenic emission OC (OCbio). Carbonaceous species, levoglucosan and (14)C in PM2.5 were measured at three types of site in southeast China combined with Latin hypercube sampling, with the objectives to study source contributions to total carbon (TC) and their uncertainties, and to evaluate the influence of levoglucosan/OCbb ratios on OCbb and OCbio partitioning. It was found reliably that fossil fuel combustion is the main contributor (62.90-72.23%) to TC at urban and peri-urban sites. Biogenic emissions have important contribution (winter, 52.98%; summer, 45.71%) to TC at background site. With the increase in levoglucosan/OCbb ratios, the contribution of OCbio is increased while OCbb is decreased in a pattern of approximate natural logarithm at a given range.
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
authors.forename: Zhenchuan
authors.initials: Z
authors.lastname: Niu
authors.forename: Sen
authors.initials: S
authors.lastname: Wang
authors.forename: Jinsheng
authors.initials: J
authors.lastname: Chen
authors.forename: Fuwang
authors.initials: F
authors.lastname: Zhang
authors.forename: Xiaoqiu
authors.initials: X
authors.lastname: Chen
authors.forename: Chi
authors.initials: C
authors.lastname: He
authors.forename: Lifeng
authors.initials: L
authors.lastname: Lin
authors.forename: Liqian
authors.initials: L
authors.lastname: Yin
authors.forename: Lingling
authors.initials: L
authors.lastname: Xu
mesh_terms: D000336:Aerosols / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000706:statistics & numerical data; D018533:Biomass; D002244:Carbon / Q000032:analysis*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D005579:Fossil Fuels; D052638:Particulate Matter / Q000032:analysis*; D012621:Seasons; D035501:Uncertainty
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D005579:Fossil Fuels; D052638:Particulate Matter; D002244:Carbon
keywords: (14)C; Carbonaceous aerosols; Levoglucosan; Source contributions; Uncertainty analysis