| 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 | |
| 通讯作者 | Huang, Ru-Jin(rujin.huang@ieecas.cn) |
| 2020-10-01 | |
| 发表期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| ISSN | 0048-9697 |
| 卷号 | 737页码:9 |
| 摘要 | The 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. |
| 关键词 | Haze pollution The Guanzhong basin Biomass burning Secondary organic aerosol |
| DOI | 10.1016/j.scitotenv.2020.139666 |
| 关键词[WOS] | YANGTZE-RIVER DELTA ; CHEMICAL SPECIATION MONITOR ; FINE PARTICULATE MATTER ; SOURCE APPORTIONMENT ; EVOLUTION PROCESSES ; MULTILINEAR ENGINE ; SUBMICRON AEROSOLS ; PRIMARY EMISSIONS ; POLLUTED CITY ; HAZE EVENTS |
| 收录类别 | SCI ; SCI |
| 语种 | 英语 |
| 资助项目 | National 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研究方向 | Environmental Sciences & Ecology |
| 项目资助者 | National 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类目 | Environmental Sciences |
| WOS记录号 | WOS:000553728100013 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/15129 |
| 专题 | 粉尘与环境研究室 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Huang, Ru-Jin |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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