DOI: 10.1016/j.atmosenv.2017.12.003
Scopus记录号: 2-s2.0-85038120853
论文题名: Statistical analysis and parameterization of the hygroscopic growth of the sub-micrometer urban background aerosol in Beijing
作者: Wang Y ; , Wu Z ; , Ma N ; , Wu Y ; , Zeng L ; , Zhao C ; , Wiedensohler A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 175 起始页码: 184
结束页码: 191
语种: 英语
英文关键词: Air pollution
; HTDMA
; Particle hygroscopicity
; Urban aerosol
Scopus关键词: Aerosols
; Air pollution
; Coal combustion
; Micrometers
; Parameterization
; Particle size
; Pollution
; Urban growth
; HTDMA
; Hygroscopic growth factor
; Hygroscopicity-tandem differential mobility analyzers
; Parameterization schemes
; Particle hygroscopicity
; Particulate matter pollution
; Urban aerosols
; Visibility degradation
; Particles (particulate matter)
; aerosol
; aerosol formation
; atmospheric pollution
; concentration (composition)
; haze
; heating
; hydrophobicity
; hygroscopicity
; particle size
; particulate matter
; relative humidity
; seasonal variation
; statistical analysis
; urban atmosphere
; aerosol
; air pollution
; airborne particle
; Article
; autumn
; China
; humidity
; particle size
; particulate matter
; priority journal
; seasonal variation
; spring
; statistical analysis
; summer
; urban area
; wettability
; Beijing [China]
; China
; North China Plain
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 take-up of water of aerosol particles plays an important role in heavy haze formation over North China Plain, since it is related with particle mass concentration, visibility degradation, and particle chemistry. In the present study, we investigated the size-resolved hygroscopic growth factor (HGF) of sub-micrometer aerosol particles (smaller than 350 nm) on a basis of 9-month Hygroscopicity-Tandem Differential Mobility Analyzer measurement in the urban background atmosphere of Beijing. The mean hygroscopicity parameter (κ) values derived from averaging over the entire sampling period for particles of 50 nm, 75 nm, 100 nm, 150 nm, 250 nm, and 350 nm in diameters were 0.14 ± 0.07, 0.17 ± 0.05, 0.18 ± 0.06, 0.20 ± 0.07, 0.21 ± 0.09, and 0.23 ± 0.12, respectively, indicating the dominance of organics in the sub-micrometer urban aerosols. In the spring, summer, and autumn, the number fraction of hydrophilic particles increased with increasing particle size, resulting in an increasing trend of overall particle hygroscopicity with enhanced particle size. Differently, the overall mean κ values peaked in the range of 75–150 nm and decreased for particles larger than 150 nm in diameter during wintertime. Such size-dependency of κ in winter was related to the strong primary particle emissions from coal combustion during domestic heating period. The number fraction of hydrophobic particles such as freshly emitted soot decreased with increasing PM2.5 mass concentration, indicating aged and internal mixed particles were dominant in the severe particulate matter pollution. Parameterization schemes of the HGF as a function of relative humidity (RH) and particle size between 50 and 350 nm were determined for different seasons and pollution levels. The HGFs calculated from the parameterizations agree well with the measured HGFs at 20–90% RH. The parameterizations can be applied to determine the hygroscopic growth of aerosol particles at ambient conditions for the area of Beijing (ultrafine and fine particles) and the North China plain (fine particles). © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83090
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; Leibniz Institute for Tropospheric Research, Leipzig, Germany; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; Centre for Atmospheric Sciences, School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester, United Kingdom
Recommended Citation:
Wang Y,, Wu Z,, Ma N,et al. Statistical analysis and parameterization of the hygroscopic growth of the sub-micrometer urban background aerosol in Beijing[J]. Atmospheric Environment,2018-01-01,175