globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2018.02.023
Scopus记录号: 2-s2.0-85042203177
论文题名:
Boundary layer structure and scavenging effect during a typical winter haze-fog episode in a core city of BTH region, China
作者: Han S; , Liu J; , Hao T; , Zhang Y; , Li P; , Yang J; , Wang Q; , Cai Z; , Yao Q; , Zhang M; , Wang X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 179
起始页码: 187
结束页码: 200
语种: 英语
英文关键词: Field experiment ; Haze-fog episode ; PM2.5 ; Scavenging effect of rime ; Vertical profile
Scopus关键词: Boundary layer flow ; Boundary layers ; Fog ; Meteorological instruments ; Turbulence ; Field experiment ; Haze-fog episode ; PM2.5 ; Scavenging effect ; Vertical profile ; Atmospheric thermodynamics ; atmospheric transport ; boundary layer ; concentration (composition) ; experimental study ; fog ; haze ; particulate matter ; scavenging (chemistry) ; turbulence ; vertical distribution ; vertical profile ; winter ; Article ; boundary layer ; China ; circadian rhythm ; fog ; haze ; humidity ; meteorology ; particulate matter ; priority journal ; temperature ; urban area ; winter ; China ; Jinghai ; Tianjin
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: The vertical distribution of PM2.5 and meteorological parameters from ground to upper levels were observed simultaneously using meteorological tower, tethered balloons and aerosol laser radar in Dec of 2016 in the urban area of Tianjin and its southern district, Jinghai. The influence of the vertical structure of boundary layer on a typical haze-fog episode was analyzed. There existed long distance transport of PM in the high layers before the haze formed in Tianjin and the downward airflows brought the PM from the high layer to the ground. In the early stages of this episode, periodic temperature inversions occurred, leading to conspicuous diurnal variations in the vertical profile of the PM2.5. In the middle and late stages of this episode, strong inversion and thick humidity layer were sustained below 400 m, and there were no big daily changes in the vertical profiles of the PM2.5. During the rapid formation period of the fog, the inversion layer was damaged and turbulence was strengthened. During the stationary phase of the fog process, wind and turbulence in the boundary layer became weak again. Rime was the main weather-related, wet cleaning mechanism that lowered pollutants concentration during this fog episode. High concentrations of water soluble ions in the rime samples and the concentrations of those ions in ambient PM2.5 appeared significant decrease during the rime period, which illustrated the scavenging effect of rime. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82992
Appears in Collections:气候变化事实与影响

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作者单位: Tianjin Institute of Meteorological Science, Tianjin, China; State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, China; Wuxi CAS Photonics Company Limited, Wuxi, China

Recommended Citation:
Han S,, Liu J,, Hao T,et al. Boundary layer structure and scavenging effect during a typical winter haze-fog episode in a core city of BTH region, China[J]. Atmospheric Environment,2018-01-01,179
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