DOI: 10.1016/j.atmosenv.2014.11.051
Scopus记录号: 2-s2.0-84930619621
论文题名: Below-cloud scavenging of aerosol particles by precipitation in a typical valley city, northwestern China
作者: Zhao S ; , Yu Y ; , He J ; , Yin D ; , Wang B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 102 起始页码: 70
结束页码: 78
语种: 英语
英文关键词: Particles
; Precipitation
; Scavenging
; Valley city
Scopus关键词: Aerosols
; Atmospheric chemistry
; Drops
; Elementary particles
; Precipitation (chemical)
; Precipitation (meteorology)
; Scavenging
; Size distribution
; Snow
; Thunderstorms
; Below-cloud scavenging
; Northwestern China
; Particle number concentration
; Precipitation scavenging
; Raindrop size distribution
; Scavenging coefficients
; Snowfall intensity
; Valley city
; Rain
; rain
; snow
; aerosol composition
; aerosol formation
; concentration (composition)
; precipitation (climatology)
; raindrop
; size distribution
; thunderstorm
; aerosol
; air pollution
; air temperature
; Article
; China
; circadian rhythm
; humidity
; meteorology
; particle size
; precipitation
; priority journal
; velocity
; water content
; China
; Gansu
; Lanzhou
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: To fill the blank information for aerosol precipitation-scavenging research in north-west of China, the aerosol particle and raindrop size distributions were measured simultaneously during 1 September 2012 to 31 August 2013 in urban Lanzhou. The scavenging coefficients of thunderstorm and non-thunderstorm rain and snow events were studied and presented on the basis of nine selected precipitation cases including 3 snow and 6 rain events. The variation of scavenging coefficients of snowfall across the size distribution clearly exhibited a trough of lower values for particles of 1000 nm-2000 nm in diameter, while the particles smaller than 500 nm were scavenged efficiently by non-thunderstorm rain, and thunderstorm rain more effectively scavenged the particles in 500-1000 nm. The snow scavenging coefficients varied between 3.11 × 10-7 s-1 and 1.18 × 10-3 s-1 in the 10-10,000 nm size range. The scavenging coefficients of thunderstorm (non-thunderstorm) rain were between 8.25 × 10-7 s-1 (7.48 × 10-6 s-1) and 1.23 × 10-3 s-1 (7.46 × 10-4 s-1). Additionally, the number of particles in 10-50 nm was more sensitive to duration of snow, while snowfall intensity was more responsible for particle number concentrations in 50-100 nm and 100-1000 nm. The longer period of precipitation with lower raindrop velocity can more effectively scavenge the particles in the size range of 10-50 nm. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82003
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu, China; University of Chinese Academy of Sciences, Beijing, China; The College of Environmental Science and Engineering, Nankai University, Tianjin, China; Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China
Recommended Citation:
Zhao S,, Yu Y,, He J,et al. Below-cloud scavenging of aerosol particles by precipitation in a typical valley city, northwestern China[J]. Atmospheric Environment,2015-01-01,102