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One-year characterization of organic aerosol markers in urban Beijing: Seasonal variation and spatiotemporal comparison
Wang, Ting1,2,3; Huang, Ru Jin2; Li, Yongjie4; Chen, Qi5; Chen, Yang6; Yang, Lu2; Guo, Jie2; Ni, Haiyan2; Hoffmann, Thorsten7; Wang, Xinming1; Mai, Bixian1
Source PublicationScience of the Total Environment

Organic aerosol (OA) is a major component of fine particulate matter (PM); however, only 10%–30% of OA have been identified as individual compounds, and some are used as markers to trace the sources and formation mechanisms of OA. The temporal and spatial coverage of these OA markers nonetheless remain inadequately characterized. This study presents a year-long measurement of 92 organic markers in PM samples collected at an urban site in Beijing from 2014 to 2015. Saccharides were the most abundant (340.1 ng m) species detected, followed by phthalic acids (283.4 ng m). In summer, high proportions (8%–24%) of phthalic acids, n-alkanes, fatty acids, and n-alcohols indicate dominant contributions of biogenic emission and atmospheric oxidation to OA in Beijing. In winter, when anthropogenic sources prevail, saccharides, polycyclic aromatic hydrocarbons, and hopanes are more prominent (4%–25%). The spatial distributions of these OA markers in China show higher concentrations in northern cities (mainly from coal combustion and biomass burning) than in southern cities (mainly from vehicular emission). The inter-annual variations of OA markers, except for hopanes, from 2001 to 2015 suggest significant alleviation of the primary OA pollution in Beijing, with an average reduction of 35%–89% compared with those before 2008. The diagnostic ratio analyses between OA markers indicate that contributions from coal combustion and biomass burning decreased, whereas those from vehicular emission increased. Increasingly large vehicle fleets have increased hopane concentrations since 2008, but the levels were 35% lower in 2015 than those in 2010–2011 because of the tightening of emission controls for vehicles. This study provides a long-term and geographical comparison (from Beijing to other locations in China and beyond) of OA markers, demonstrating the temporal and spatial variations in primary OA, and calls for more studies on secondary OA.

KeywordAir Pollution Inter-annual Variations Oa Markers Seasonal Characterization Spatial Distributions
URLView the original
Indexed BySCIE
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000573543300012
Scopus ID2-s2.0-85087632840
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Document TypeJournal article
Corresponding AuthorHuang, Ru Jin
Affiliation1.State Key Laboratory of Organic Geochemistry and Guangdong, Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
2.State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, Key Laboratory of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China
3.University of Chinese Academy of Sciences, Beijing, 100049, China
4.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, Taipa, 999078, China
5.State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
6.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China
7.Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University, Mainz, Mainz, Duesbergweg 10-14, 55128, Germany
Recommended Citation
GB/T 7714
Wang, Ting,Huang, Ru Jin,Li, Yongjie,et al. One-year characterization of organic aerosol markers in urban Beijing: Seasonal variation and spatiotemporal comparison[J]. Science of the Total Environment,2020,743:140689.
APA Wang, Ting,Huang, Ru Jin,Li, Yongjie,Chen, Qi,Chen, Yang,Yang, Lu,Guo, Jie,Ni, Haiyan,Hoffmann, Thorsten,Wang, Xinming,&Mai, Bixian.(2020).One-year characterization of organic aerosol markers in urban Beijing: Seasonal variation and spatiotemporal comparison.Science of the Total Environment,743,140689.
MLA Wang, Ting,et al."One-year characterization of organic aerosol markers in urban Beijing: Seasonal variation and spatiotemporal comparison".Science of the Total Environment 743(2020):140689.
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