DOI: 10.1016/j.atmosenv.2014.09.074
Scopus记录号: 2-s2.0-84907970767
论文题名: Observation of nucleation mode particle burst and new particle formation events at an urban site in Hong Kong
作者: Wang D ; , Guo H ; , Cheung K ; , Gan F
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 99 起始页码: 196
结束页码: 205
语种: 英语
英文关键词: New particle formation
; Nucleation burst
; Nucleation mode particle
; Primary emission
Scopus关键词: Hong-kong
; New particle formation
; Nucleation bursts
; Nucleation mode particles
; Primary emissions
; Urban site
; carbon monoxide
; nitrogen oxide
; ozone
; sulfur dioxide
; sulfuric acid
; air sampling
; nucleation
; ozone
; particle size
; size distribution
; sulfuric acid
; urban area
; urban atmosphere
; air pollutant
; air sampling
; Article
; atmosphere
; chemical reaction
; circadian rhythm
; combustion
; concentration (parameters)
; environmental aspects and related phenomena
; Hong Kong
; humidity
; particle size
; particulate matter
; photochemistry
; solar radiation
; urban area
; weather
; China
; Hong Kong
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 (PN) concentrations and particle size distributions (PSD) in the size range of 5.5-350nm were continuously measured from 22 December 2010 to 20 January 2011 at an urban site in Hong Kong when northeastern monsoon prevailed. Apart from the PN peaks appeared in traffic rush hours (i.e. 08:00-09:00 and 17:00-18:00), a distinct peak of PN concentrations in the afternoon (11:00-16:00) was observed during the sampling period. Concurrent measurement data of PSD, ozone (O3) and proxy sulfuric acid (H2SO4) concentrations revealed that the afternoon peaks observed were likely due to new particle formation (NPF) via photochemical reactions. These NPF events were frequently observed under a clean and dry weather in Hong Kong. The occurrence of NPF was closely associated with high solar radiation (SR), low relative humidity (RH) and low condensation sink (CS) in the atmosphere. Besides the NPF events, we also found four nucleation mode particle burst events, typically with increased number concentrations of nucleation mode particles (Nnuc) without growth to larger size particles. These burst events were generally accompanied by high-level primary air pollutants, i.e. sulfur dioxide (SO2), nitrogen oxide (NOx) and carbon monoxide (CO), low SR and high CS conditions. The very different characteristics of the burst events from those of the NPF events indicated that these nucleation mode particle burst events were not caused by the photochemical reactions, but by the primary emission from the local combustion source(s). © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80544
Appears in Collections: 气候变化事实与影响
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作者单位: School of Resource and Environmental Science, Department of Environmental Engineering, Wuhan University, Wuhan, China; Air Quality Studies, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong; Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen, China
Recommended Citation:
Wang D,, Guo H,, Cheung K,et al. Observation of nucleation mode particle burst and new particle formation events at an urban site in Hong Kong[J]. Atmospheric Environment,2014-01-01,99