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Seasonal variations in the sources of organic aerosol in Xi'an, Northwest China: The importance of biomass burning and secondary formation
Zhong, Haobin1,2; Huang, Ru-Jin1,3; Duan, Jing1,2; Lin, Chunshui1; Gu, Yifang1,2; Wang, Ying1,2; Li, Yongjie4; Zheng, Yan5; Chen, Qi5; Chen, Yang6; Dai, Wenting1; Ni, Haiyan1; Chang, Yunhua7; Worsnop, Douglas R.8; Xu, Wei1,9,10; Ovadnevaite, Jurgita9,10; Ceburnis, Darius9,10; O'Dowd, Colin D.9,10
Corresponding AuthorHuang, Ru-Jin(rujin.huang@ieecas.cn)
2020-10-01
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume737Pages:9
AbstractThe Guanzhong basin is a part of the three top priority regions in China's blue sky action as of 2019. Understanding the chemical composition, sources, and atmospheric process of aerosol in this region is therefore imperative for improving air quality. In this study, we present, for the first time, the seasonal variations of organic aerosol (OA) in Xi'an, the largest city in the Guanzhong basin. Biomass burning OA (BBOA) and oxidized OA (OOA) contributed N50% of OA in both autumn and winter. The average concentrations of BBOA in autumn (14.8 +/- 5.1 mu g m(-3)) and winter (11.6 +/- 6.8 mu g m(-3)) were similar. The fractional contribution of BBOA to total OA, however, decreased from 31.9% in autumn to 15.3% in winter, because of enhanced contributions from other sources in winter. The OOA fraction in OA increased largely from 20.9% in autumn to 34.9% in winter, likely due to enhanced emissions of precursors and stagnant meteorological conditions which facilitate the accumulation and secondary formation. A large increase in OOA concentration was observed during polluted days, by a factor of similar to 4 in autumn and similar to 6 in winter compared to clean days. In both seasons, OOA formation was most likely dominated by photochemical oxidation when aerosol liquid water content was b30 mu g m(-3) or by aqueous-phase processes when Ox was b35 ppb. A higher concentration of BBOA was observed for air masses circulated within the Guanzhong basin (16.5-18.1 mu g m(-3)), compared to air masses from Northwest and West (10.9-14.5 mu g m(-3)). Furthermore, compared with OA fraction in non-refractory PM1 in other regions of China, BBOA (17-19%) and coal combustion OA (10-20%) were major emission sources in the Guanzhong Basin and the BTH region, respec-tively, whereas OOA (10-34%) was an important source in all studied regions. (C) 2020 Elsevier B.V. All rights reserved.
KeywordHaze pollution The Guanzhong basin Biomass burning Secondary organic aerosol
DOI10.1016/j.scitotenv.2020.139666
WOS KeywordYANGTZE-RIVER DELTA ; CHEMICAL SPECIATION MONITOR ; FINE PARTICULATE MATTER ; SOURCE APPORTIONMENT ; EVOLUTION PROCESSES ; MULTILINEAR ENGINE ; SUBMICRON AEROSOLS ; PRIMARY EMISSIONS ; POLLUTED CITY ; HAZE EVENTS
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[41925015] ; National Natural Science Foundation of China (NSFC)[91644219] ; National Natural Science Foundation of China (NSFC)[41877408] ; Chinese Academy of Sciences[ZDBS-LY-DQC001] ; Cross Innovative Team fund from the State Key Laboratory of Loess and Quaternary Geology[SKLLQGTD1801] ; SFI ; Science Foundation Ireland ; University of Macau Research Council[MYRG2018-00006-FST]
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; Cross Innovative Team fund from the State Key Laboratory of Loess and Quaternary Geology ; SFI ; Science Foundation Ireland ; University of Macau Research Council
WOS SubjectEnvironmental Sciences
WOS IDWOS:000553728100013
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15129
Collection粉尘与环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorHuang, Ru-Jin
Affiliation1.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, State Key Lab Loess & Quaternary Geol SKLLQG, Key Lab Aerosol Chem & Phys,Inst Earth Environm, Xian 710061, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
4.Univ Macau, Fac Sci & Technol, Dept Civil & Environm Engn, Taipa 999078, Macao, Peoples R China
5.Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China
6.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
7.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Peoples R China
8.Aerodyne Res Inc, Billerica, MA 01821 USA
9.Natl Univ Ireland Galway, Sch Phys, Ryan Inst, Univ Rd, Galway H91 CF50, Ireland
10.Natl Univ Ireland Galway, Ctr Climate & Air Pollut Studies, Ryan Inst, Univ Rd, Galway H91 CF50, Ireland
Recommended Citation
GB/T 7714
Zhong, Haobin,Huang, Ru-Jin,Duan, Jing,et al. Seasonal variations in the sources of organic aerosol in Xi'an, Northwest China: The importance of biomass burning and secondary formation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,737:9.
APA Zhong, Haobin.,Huang, Ru-Jin.,Duan, Jing.,Lin, Chunshui.,Gu, Yifang.,...&O'Dowd, Colin D..(2020).Seasonal variations in the sources of organic aerosol in Xi'an, Northwest China: The importance of biomass burning and secondary formation.SCIENCE OF THE TOTAL ENVIRONMENT,737,9.
MLA Zhong, Haobin,et al."Seasonal variations in the sources of organic aerosol in Xi'an, Northwest China: The importance of biomass burning and secondary formation".SCIENCE OF THE TOTAL ENVIRONMENT 737(2020):9.
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