DOI: 10.1016/j.atmosenv.2020.117312
论文题名: Impact of control measures and typhoon weather on characteristics and formation of PM2.5 during the 2016 G20 summit in China
作者: Zhang Y. ; Hong Z. ; Chen J. ; Xu L. ; Hong Y. ; Li M. ; Hao H. ; Chen Y. ; Qiu Y. ; Wu X. ; Li J.-R. ; Tong L. ; Xiao H.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 224 语种: 英语
英文关键词: Atmospheric movements
; Emission control
; Fog
; River pollution
; Storms
; Control measures
; Formation mechanism
; Heterogeneous formation
; High relative humidities
; Inorganic components
; Regional transport
; Secondary inorganic aerosol
; Water soluble inorganic ions
; Hurricanes
; black carbon
; calcium
; ion
; magnesium
; nitrate
; sodium
; aerosol
; black carbon
; emission control
; oxidation
; particulate matter
; relative humidity
; sea salt
; transformation
; typhoon
; air pollution control
; Article
; atmosphere
; China
; concentration (parameter)
; control strategy
; controlled study
; humidity
; hurricane
; meteorology
; oxidation
; particulate matter
; priority journal
; China
; Ningbo
; Yangtze River
; Zhejiang
学科: Control measures
; Formation mechanism
; G20
; Regional transport
; Secondary inorganic aerosol
; Typhoon
中文摘要: The implementation of strict emission control during the G20 summit in China and the occurrence of Typhoon Malarkas in September 2016 provided a valuable opportunity to examine the role of control measures and special weather condition in the formation of PM2.5. Water-soluble inorganic ions (WSII) were measured hourly in addition to PM2.5 mass concentration and black carbon (BC) and gaseous pollutants in Ningbo located in the Yangtze River Delta (YRD) region of China. Three distinct cases, i.e., a control case, a normal case, and a typhoon case, were investigated during the study period. PM2.5 was higher in the control case (37.5 μg m−3) than in the normal case (29.8 μg m−3), whereas the lowest PM2.5 (14.2 μg m−3) was observed in the typhoon case. The analyses of meteorology and backward trajectory suggested that stable weather and regional transport from inland regions accounted for the high PM2.5 under strict control. Only the concentrations of Ca2+ and NO3− decreased in the control case, while those of all water-soluble inorganic components (except Na+ and Mg2+) decreased substantially in the typhoon case. SO42− dominated the WSII, with the highest contribution, 62%, in the control case. This result was attributed to a stagnant atmosphere with a high relative humidity (RH), which was beneficial for the transformation of SO2 to SO42−. The control and typhoon cases both resulted in extremely low NO2, but the contribution of NO3− to PM2.5 was reduced in the control case and increased in the typhoon case. The close correlation of the NOR (nitrate oxidation ratio) with Na+ and Mg2+ in the typhoon case was indicative of sea salt associated with the typhoon which provided a surface for the heterogeneous formation of NO3−. The presented results facilitate a better understanding of the characteristics and formation of PM2.5 under the influence of artificial control and natural intervention. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160481
Appears in Collections: 气候变化与战略
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作者单位: Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100086, China; LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
Recommended Citation:
Zhang Y.,Hong Z.,Chen J.,et al. Impact of control measures and typhoon weather on characteristics and formation of PM2.5 during the 2016 G20 summit in China[J]. Atmospheric Environment,2020-01-01,224