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Mixing State of Black Carbon Aerosol in a Heavily Polluted Urban Area of China: Implications for Light Absorption Enhancement
Wang, QY (Wang, Qiyuan)[ 1 ]; Huang, RJ (Huang, R. -J.)[ 2,3 ]; Cao, JJ (Cao, Junji)[ 1,4 ]; Han, YM (Han, Yongming)[ 1 ]; Wang, GH (Wang, Gehui)[ 1 ]; Li, GH (Li, Guohui)[ 1 ]; Wang, YC (Wang, Yichen)[ 1 ]; Dai, WT (Dai, Wenting)[ 1 ]; Zhang, RJ (Zhang, Renjian)[ 5 ]; Zhou, YQ (Zhou, Yaqing)[ 1 ]
2014
发表期刊AEROSOL SCIENCE AND TECHNOLOGY
卷号48期号:7页码:689-697
文章类型期刊论文
摘要

Black carbon (BC) is important for climate forcing, and its effects on the Earth's radiative balance remain a major uncertainty in climate models. In this study, we investigated the mixing state of refractory black carbon (rBC) and aerosol optical properties in a polluted atmosphere at Xi'an, western China. The average rBC mass concentration was 9.9 mu g m (3) during polluted periods, 7.6 times higher than that in clean periods. About 48.6% of the rBC was internally-mixed or coated with nonrefractory materials during polluted periods; this was 27% higher than in clean periods. Correlation analysis between the number fraction of thickly-coated rBC particles (f(BC)) and the major particulate species indicate that organics may be the primary contributor to rBC coatings during polluted periods. The average mass absorption cross section of rBC (MAC(BC)) particles at lambda = 870 nm was 7.6 +/- 0.02 m(2) g(-1) for the entire campaign. The MAC(BC) showed a positive correlation with f(BC), and the enhancement of MAC(BC) due to internal mixing was 1.8 times. These observations suggest that an enhancement of BC absorption by a factor of similar to 2 could be appropriate for climate models associated with high PM2.5 levels.

DOI10.1080/02786826.2014.917758
收录类别SCIE
语种英语
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被引频次:112[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9802
专题粉尘与环境研究室
通讯作者Cao, JJ (Cao, Junji)[ 1,4 ]
作者单位1.Key Laboratory of Aerosol Science & Technology, SKLLQG, Institute of Earth Environment,Chinese Academy of Sciences, Xi’an, China;
2.Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen PSI, Switzerland;
3.Centre for Climate and Air Pollution Studies, Ryan Institute, National University of IrelandGalway, Galway, Ireland;
4.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an, China;
5.Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
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GB/T 7714
Wang, QY ,Huang, RJ ,Cao, JJ ,et al. Mixing State of Black Carbon Aerosol in a Heavily Polluted Urban Area of China: Implications for Light Absorption Enhancement[J]. AEROSOL SCIENCE AND TECHNOLOGY,2014,48(7):689-697.
APA Wang, QY .,Huang, RJ .,Cao, JJ .,Han, YM .,Wang, GH .,...&Zhou, YQ .(2014).Mixing State of Black Carbon Aerosol in a Heavily Polluted Urban Area of China: Implications for Light Absorption Enhancement.AEROSOL SCIENCE AND TECHNOLOGY,48(7),689-697.
MLA Wang, QY ,et al."Mixing State of Black Carbon Aerosol in a Heavily Polluted Urban Area of China: Implications for Light Absorption Enhancement".AEROSOL SCIENCE AND TECHNOLOGY 48.7(2014):689-697.
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