DOI: 10.1016/j.atmosenv.2020.117350
论文题名: Impact of air transport and secondary formation on haze pollution in the Yangtze River Delta: In situ online observations in Shanghai and Nanjing
作者: Sun P. ; Nie W. ; Wang T. ; Chi X. ; Huang X. ; Xu Z. ; Zhu C. ; Wang L. ; Qi X. ; Zhang Q. ; Ding A.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 225 语种: 英语
英文关键词: Aerosols
; Air pollution
; Atmospheric movements
; Emission control
; Nitrates
; Air transport
; Chemical compositions
; Long range transport
; On-line observations
; Photochemical activity
; Regional pollution
; Secondary formation
; Yangtze river delta
; River pollution
; hydrocarbon
; nitrate
; ozone
; aerosol
; air transportation
; atmospheric pollution
; cold front
; concentration (composition)
; emission control
; episodic event
; haze
; long range transport
; ozone
; particle size
; particulate matter
; photochemistry
; aerosol
; air pollution
; air pollution control
; Article
; atmospheric transport
; China
; city
; environmental impact
; haze
; online analysis
; particulate matter
; photochemistry
; pollution transport
; priority journal
; river
; seasonal variation
; summer
; wind speed
; winter
; China
; Fujian
; Nanjing [Fujian]
; Shanghai
; Yangtze River
学科: Aerosol pollution
; Chemical composition
; Regional air transport
; Secondary formation
; Yangtze River Delta
中文摘要: Despite frequent haze pollution in China in recent years, our knowledge of regional pollution episodes associated with air transport and synoptic weather systems is limited. In this study, we conducted two intensive campaigns simultaneously to measure the highly time-resolved chemical composition of fine particles (PM2.5) in suburban Shanghai and Nanjing during the winter of 2017 and the summer of 2018. The average PM2.5 mass concentrations were 53.9 (65.7) μg m−3 and 32.8 (37.3) μg m−3 in Shanghai (Nanjing) in winter and summer, respectively. In winter, extreme haze episodes were observed synchronously with enhanced contributions of nitrate at both sites and of low-volatile oxidized organic aerosol (LV-OOA) in Shanghai. Long-range transport from Northern China was demonstrated to play an important role in the episodes, which occurred simultaneously at both sites. Influenced by the cold fronts, Nanjing had a relatively longer pollution duration, whereas Shanghai exhibited faster PM increases. In summer, air masses passing through the city-clusters of the YRD were responsible for the pollution episodes. Low wind speeds, which favored the accumulation of primary aerosols, and strong photochemical activity indicated by high ozone level, which promoted the formation of secondary aerosols, resulted in elevated contributions of nitrate, Hydrocarbon-like organic aerosol (HOA) and semi-volatile oxidized organic aerosol (SV-OOA) to PM in Shanghai. In addition, a pollution episode dominated by increases of nitrate and organic aerosols was observed in Nanjing two days later despite the clean situation in Shanghai. Our results highlight the importance of regional or sub-regional emission control to mitigate haze pollution in city clusters, such as the YRD in Eastern China. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160432
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; Jiangsu Provincial Collaborative Innovation Center of Climate Change, Nanjing, 210023, China; Department of Environmental Toxicology, University of California, DavisCA 95616, United States
Recommended Citation:
Sun P.,Nie W.,Wang T.,et al. Impact of air transport and secondary formation on haze pollution in the Yangtze River Delta: In situ online observations in Shanghai and Nanjing[J]. Atmospheric Environment,2020-01-01,225