Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2018.08.023 |
The influence of wind speed on new particle formation events in an urban environment | |
Pushpawela, Buddhi; Jayaratne, Rohan; Morawska, Lidia | |
2019 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2019 |
卷号 | 215页码:37-41 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | New particle formation (NPF) is a common occurrence in urban environments where it is promoted by a ready supply of gaseous precursors such as sulfuric acid, ammonium and volatile organic compounds originating mainly from motor vehicle emissions, In this paper, we investigate the influence of wind speed on the occurrence of NPF events in a subtropical urban environment. The analysis was based on a large data set obtained with a neutral cluster and air ion spectrometer (NAIS) over 485 days of observations, out of which NPF events were observed on 213 days. Particles formation was most likely to occur during the morning hours and we observed NPF events between 8 am and noon on 123 of these days. In order to assess its influence, we estimated the mean wind speed between 8 and 9 am on these 123 days and on the days with no NPF. We found a statistically significant difference in average wind speeds during days with NPF (1.31 m s(-1)) and days with no NPF (1.84 m s(-1)) (p < 0.05). Several studies have shown that increasing wind speed enhances NPF in polluted megacities by removing pre-existing particles. Our observations indicate that this effect is less important in smaller cities, so that higher wind speeds can mitigate NPF by the removal of condensable gases. The wind speed does not affect the rate of NPF in clean environments. |
英文关键词 | New particle formation Wind speed Atmospheric aerosols Secondary particles |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447575100003 |
WOS关键词 | GROWTH EVENTS ; SIZE DISTRIBUTION ; NEUTRAL CLUSTER ; SPECTROMETER ; ION ; NUCLEATION ; SITE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/38427 |
专题 | 地球科学 |
作者单位 | Queensland Univ Technol, Int Lab Air Qual & Hlth, GPO Box 2434, Brisbane, Qld 4001, Australia |
推荐引用方式 GB/T 7714 | Pushpawela, Buddhi,Jayaratne, Rohan,Morawska, Lidia. The influence of wind speed on new particle formation events in an urban environment[J]. ATMOSPHERIC RESEARCH,2019,215:37-41. |
APA | Pushpawela, Buddhi,Jayaratne, Rohan,&Morawska, Lidia.(2019).The influence of wind speed on new particle formation events in an urban environment.ATMOSPHERIC RESEARCH,215,37-41. |
MLA | Pushpawela, Buddhi,et al."The influence of wind speed on new particle formation events in an urban environment".ATMOSPHERIC RESEARCH 215(2019):37-41. |
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