Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-521-2017 |
Nocturnal new particle formation events in urban environments | |
Salimi, Farhad1,2; Rahman, Md. Mahmudur2; Clifford, Sam2; Ristovski, Zoran2; Morawska, Lidia2 | |
2017-01-11 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Few studies have investigated nocturnal new particle formation (NPF) events, and none of them were conducted in urban environments. Nocturnal NPF can potentially be a significant source of particles in urban areas, and studying them would improve our understanding of nucleation mechanisms. To address this, our study was conducted in an urban environment to investigate the physical characteristics of NPF events, with a particular focus on nocturnal events and the differences between them and the daytime NPF events. Particle number size distribution (PNSD) was measured for 2 weeks at each of 25 sites across an urban environment. A new method was proposed to automatically categorise NPF events based on growth rate (GR) in order to remove the bias related to the manual procedure. Out of 219 observed events, 118 and 101 were categorised into class I and II respectively and 73 happened during the nighttime which included more than 30% of the events. GR and condensation sink (CS) were calculated and a slight negative relationship between GR and CS was observed. Nocturnal events displayed higher GRs compared to daylight ones which were on average about 10 %. Back trajectory analysis was also conducted to estimate the locations of the sources of daylight and nocturnal precursors. While the precursors related to daylight events originated from different locations with no particular pattern, back-trajectory analysis showed many air masses associated with nocturnal NPF events were transported from over the ocean. Overall, nocturnal NPF events were found to be a significant source of particles in the studied environment with different physical characteristics and/or sources compared to daylight events. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393785000003 |
WOS关键词 | AEROSOL-SIZE DISTRIBUTION ; PARTICULATE AIR-POLLUTION ; ATMOSPHERIC NANOPARTICLES ; ULTRAFINE PARTICLES ; SPATIAL VARIATION ; DIMETHYL SULFIDE ; GROWTH-RATES ; NUCLEATION ; DISTRIBUTIONS ; FOREST |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16230 |
专题 | 地球科学 |
作者单位 | 1.Univ Tasmania, Menzies Inst Med Res, Hobart, Tas, Australia; 2.Queensland Univ Technol, Int Lab Air Qual & Hlth, GPO Box 2434, Brisbane, Qld 4001, Australia |
推荐引用方式 GB/T 7714 | Salimi, Farhad,Rahman, Md. Mahmudur,Clifford, Sam,et al. Nocturnal new particle formation events in urban environments[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(1). |
APA | Salimi, Farhad,Rahman, Md. Mahmudur,Clifford, Sam,Ristovski, Zoran,&Morawska, Lidia.(2017).Nocturnal new particle formation events in urban environments.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(1). |
MLA | Salimi, Farhad,et al."Nocturnal new particle formation events in urban environments".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.1(2017). |
条目包含的文件 | 条目无相关文件。 |
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