DOI: 10.1016/j.atmosenv.2017.06.001
Scopus记录号: 2-s2.0-85020801844
论文题名: Long-term quantitative field study of New Particle Formation (NPF) events as a source of Cloud Condensation Nuclei (CCN) in the urban background of Vienna
作者: Dameto de España C ; , Wonaschütz A ; , Steiner G ; , Rosati B ; , Demattio A ; , Schuh H ; , Hitzenberger R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 164 起始页码: 289
结束页码: 298
语种: 英语
英文关键词: Cloud condensation nuclei
; Long-term CCN study
; New particle formation events
; Urban aerosol
Scopus关键词: Carbon
; Condensation
; Supersaturation
; Boundary layer heights
; Cloud condensation nuclei
; Concentration effects
; Long-term CCN study
; Long-term measurements
; New particle formation
; Particle number size distribution
; Urban aerosols
; Particulate emissions
; black carbon
; aerosol
; air mass
; black carbon
; boundary layer
; cloud condensation nucleus
; concentration (composition)
; field method
; particle size
; traffic emission
; wind direction
; wind velocity
; aerosol
; Article
; Austria
; boundary layer
; case study
; cloud condensation nuclei
; comparative study
; concentration (parameters)
; controlled study
; dilution
; environmental parameters
; field study
; measurement
; meteorology
; new particle formation
; particle size
; particulate matter
; priority journal
; quantitative study
; time series analysis
; urban area
; velocity
; weather
; Austria
; Vienna
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: Many studies have indicated New Particle Formation (NPF) events as an important source of CCN in the atmosphere. However, most of these studies are based on indirect determination of CCN concentrations or were of rather short duration. In this study, we present long-term measurements of CCN concentrations and particle number size distributions performed in the urban background of Vienna, Austria, spanning a period of two years. NPF events occurred on 70 of the 539 measurement days. For 38 of these events, concurrent CCN concentrations (measured at 0.5% supersaturation) are available. Direct comparisons of absolute CCN concentrations before and after an event, however, are inconclusive as other influences can lead to changes in CCN concentrations. In this study, we developed criteria to take local emissions of ultrafine particles, atmospheric mixing conditions and changes in air mass into account. A new normalization procedure (CCN/PM2.5) is introduced to account for dilution and concentration effects due to changes in boundary layer height. Other possible influences, such as weather conditions and traffic emissions were accounted for by tracking wind direction and velocity, as well as black carbon (BC) mass concentrations. On 15 event days, all criteria to exclude other influences were met. On 14 days, NPF was found to be a source of CCN (at 0.5% supersaturation), with concentration increases by up to 143%. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82408
Appears in Collections: 气候变化事实与影响
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作者单位: University of Vienna, Faculty of Physics, Aerosol Physics and Environmental Physics, Boltzmanngasse 5, Vienna, Austria; University of Innsbruck, Institute for Ion Physics and Applied Physics, Technikerstraße 25, Innsbruck, Austria
Recommended Citation:
Dameto de España C,, Wonaschütz A,, Steiner G,et al. Long-term quantitative field study of New Particle Formation (NPF) events as a source of Cloud Condensation Nuclei (CCN) in the urban background of Vienna[J]. Atmospheric Environment,2017-01-01,164