globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD027952
Scopus记录号: 2-s2.0-85046466316
论文题名:
Evidence of Rural and Suburban Sources of Urban Haze Formation in China: A Case Study From the Pearl River Delta Region
作者: Liu J.; Ding P.; Zong Z.; Li J.; Tian C.; Chen W.; Chang M.; Salazar G.; Shen C.; Cheng Z.; Chen Y.; Wang X.; Szidat S.; Zhang G.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:9
起始页码: 4712
结束页码: 4726
语种: 英语
英文关键词: air pollution ; elemental carbon ; organic carbon ; radiocarbon
Scopus关键词: air mass ; atmospheric pollution ; biomass burning ; carbon isotope ; elemental carbon ; exhaust emission ; haze ; organic carbon ; particulate matter ; rural area ; suburban area ; China ; Guangdong ; Zhujiang Delta
英文摘要: Although particulate matter (PM)-driven haze is a common phenomenon in many Chinese cities, studies on the sources of its key components, such as organic carbon (OC) and elemental carbon (EC), are poorly constrained. In this study, PM with aerodynamic diameters less than 10 (PM10), 2.5 (PM2.5), and 1 μm (PM1) were collected at an urban site in the core city of the Pearl River Delta region in summer 2013. The average PM10, PM2.5, and PM1 mass concentrations were 109 ± 28.4, 57.7 ± 15.0, and 50.9 ± 13.2 μg/m3, respectively. A PM-driven haze bloom-decay process was observed from 9 to 14 July and studied based on radiocarbon (14C) and stable nitrogen isotope (15N). The 14C results revealed that 87% of EC and 53% of OC in PM2.5 were derived from fossil sources on a typical summer day (9 July), while these values fell to 79% and 40% on 12 July and 76% and 29% on 13 July, respectively, due to the invasion of nonfossil-enriched air masses from rural/suburban areas. In addition, a 15N-derived model showed that nonfossil sources contributed 5% of NH3 on 9 July, which increased to about 80% on 12 and 13 July. However, the 15N-NO3 − values were relatively stable, probably because of the large area of overlap in 15N-NOx from biomass burning and traffic exhaust. To our knowledge, this work is the first study to report both daily 14C and 15N signals in China and identify nonfossil sources from rural/suburban areas as triggers of summer haze. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113903
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Organic Geochemistry and State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chines Academy of Sciences, Guangzhou, China; Department of Chemistry and Biochemistry and Oeschger Centre for Climate Change Research, University of Bern, Berne, Switzerland; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China; School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; College of Environmental Science and Engineering, Tongji University, Shanghai, China

Recommended Citation:
Liu J.,Ding P.,Zong Z.,et al. Evidence of Rural and Suburban Sources of Urban Haze Formation in China: A Case Study From the Pearl River Delta Region[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(9)
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