DOI: 10.1016/j.atmosenv.2014.04.020
Scopus记录号: 2-s2.0-84899149350
论文题名: Comparative study of ultrafine atmospheric aerosol within a city
作者: Salma I ; , Borsós T ; , Németh Z ; , Weidinger T ; , Aalto P ; , Kulmala M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 154
结束页码: 161
语种: 英语
英文关键词: Anthropogenic impact
; Diurnal variation
; Nucleation strength factor
; Particle number concentration
; Particle number size distribution
; Urban environment
Scopus关键词: Atmospheric aerosols
; Nucleation
; Size distribution
; Anthropogenic impacts
; Diurnal variation
; Particle number concentration
; Particle number size distribution
; Strength factor
; Urban environments
; Urban growth
; anthropogenic effect
; atmospheric pollution
; comparative study
; diurnal variation
; nucleation
; particle size
; size distribution
; ultrafiltration
; urban atmosphere
; article
; atmosphere
; atmospheric aerosol
; circadian rhythm
; city
; comparative study
; concentration (parameters)
; controlled study
; nucleation strength factor
; particle size
; physical parameters
; priority journal
; urban area
; working time
; Budapest
; Hungary
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: Particle number size distributions in a mobility diameter range of 6-1000nm and size-resolved number concentrations were determined with a time resolution of 10min for a near-city background, city centre, street canyon and road tunnel environments in Budapest. Median N6-100 concentrations for the sites listed were 3.1×103, 9.3×103, 19.4×103 and 123×103cm-3, respectively. Contributions of the ultrafine (UF) particles (<100nm) to the total particle number for all locations were rather large (up to 86%), and do not seem to vary substantially in time. Diurnal variations of the mean N6-100 concentrations had different patterns for both the various urban sites, and for workdays and weekends. Nucleation strength factor (NSF) was introduced for the first time to quantify the relative importance of new particle formation with respect to all sources of UF particles. During the daytime in summer, nucleation in the near-city background was a major production process of UF particles with a daily mean relative contribution of 42%. In the city centre and street canyon, the daily mean relative contributions of nucleation to the UF particles were 30% and 23%, respectively. Median particle diameters for the background, city centre, street canyon and road tunnel environments were 61, 42, 35 and 42nm, respectively, so they were jointly influenced with the anthropogenic impact and aerosol ageing. Monthly mean frequency of new particle formation and growth events in the background seems somewhat larger, while it appears smaller for the street canyon in comparison to the city centre. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81306
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Chemistry, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary; Department of Meteorology, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary; Department of Physical Sciences, FI-00014 University of Helsinki, P.O. Box 64, Finland
Recommended Citation:
Salma I,, Borsós T,, Németh Z,et al. Comparative study of ultrafine atmospheric aerosol within a city[J]. Atmospheric Environment,2014-01-01,92