DOI: 10.1016/j.atmosenv.2014.10.055
Scopus记录号: 2-s2.0-84909960066
论文题名: Size-resolved effective density of urban aerosols in Shanghai
作者: Yin Z ; , Ye X ; , Jiang S ; , Tao Y ; , Shi Y ; , Yang X ; , Chen J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 100 起始页码: 133
结束页码: 140
语种: 英语
英文关键词: Atmospheric aerosol
; DMA-APM system
; Effective density
; Yangtze River Delta
Scopus关键词: DMA-APM system
; Effective density
; Urban aerosols
; Yangtze river delta
; Atmospheric aerosols
; Aitken nucleus
; diurnal variation
; hygroscopicity
; particle size
; particulate matter
; sulfate
; urban atmosphere
; aerosol
; Article
; China
; density
; effect size
; mathematical analysis
; particle size
; urban area
; China
; Shanghai
; Yangtze Delta
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: Size-resolved effective density of 50-400nm urban particles was determined by a TDMA-APM system in Shanghai during wintertime. The average effective density ranged from 1.36 to 1.55gcm-3, increasing with the particle diameter. The size dependent increase of density was consistent with previous hygroscopic measurements. We attributed the increase in density to the condensation of hygroscopic secondary aerosols and large massive organics. The diurnal variation of effective density was pronounced for smaller particles. A similar diurnal pattern was observed between particle density and the contribution of secondary NH4NO3 and (NH4)2SO4 to PM1.0, suggesting that density change in response to particle compositions. The effective density of Aitken mode particles had a considerable increase during the NPF event, in agreement with the contribution of sulfate. Particle mass distribution was derived from particle number distribution in combination with effective density. PM0.6 was highly correlated with PM1.0, revealing that secondary aerosols tend to condense on smaller particles. © 2014 Elsevier Ltd.All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82074
Appears in Collections: 气候变化事实与影响
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作者单位: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), Department of Environmental Science and Engineering, Fudan University, Shanghai, China
Recommended Citation:
Yin Z,, Ye X,, Jiang S,et al. Size-resolved effective density of urban aerosols in Shanghai[J]. Atmospheric Environment,2015-01-01,100