气候变化领域集成服务门户(CCPortal): Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment

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DOI	10.1016/j.atmosenv.2020.117835
	Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment
	Zimmerman A.; Petters M.D.; Meskhidze N.
发表日期	2020
ISSN	13522310
卷号	242
英文摘要	Ultrafine particles with diameters less than 100 nm suspended in the air are a topic of interest in air quality and climate sciences. Sub-10 nm particles are of additional interest due to their health effects and contribution to particle growth processes. Ambient measurements were carried out at North Carolina State University in Raleigh, NC between April to June 2019 and November 2019 to May 2020 to investigate the temporal variability of size distribution and number concentration of ultrafine particles. A mobile lab was deployed between March and May 2020 to characterize the spatial distribution of sub-10 nm particle number concentration. New particle formation and growth events were observed regularly. Also observed were direct emissions of sub-10 nm particles. Analysis against meteorological variables, gas-phase species, and particle concentrations show that the sub-10nm particles dominated number concentration during periods of low planetary boundary layer height, low solar radiation, and northeast winds. The spatial patterns observed during mobile deployments suggest that multiple temporally stable and spatially confined point sources of sub-10 nm particles are present within the city. These sources likely include the campus utility plants and the Raleigh-Durham International Airport. Additionally, the timing of data collection allowed for investigation of variations in the urban aerosol number size distribution due to reduced economic activity during the COVID-19 pandemic. © 2020 Elsevier Ltd
英文关键词	Air pollution; New particle formation; Sub-10 nm aerosol; Urban aerosol
语种	英语
scopus关键词	Air quality; Boundary layer flow; Boundary layers; Economics; Gas dynamics; Growth rate; Size distribution; Urban growth; International airport; Meteorological variables; New particle formation; North Carolina State University; Number concentration; Particle concentrations; Particle number concentration; Planetary boundary layers; Particle size analysis; aerosol; air quality; boundary layer; concentration (composition); emission; observational method; size distribution; spatial distribution; spatiotemporal analysis; urban pollution; aerosol; air pollution; airport; ambient air; Article; boundary layer; circadian rhythm; coronavirus disease 2019; electric field; growth rate; maximum concentration; meteorology; North Carolina; pandemic; particle size; priority journal; solar radiation; urban area; wind; North Carolina; United States
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/152991
作者单位	Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States
推荐引用方式 GB/T 7714	Zimmerman A.,Petters M.D.,Meskhidze N.. Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment[J],2020,242.
APA	Zimmerman A.,Petters M.D.,&Meskhidze N..(2020).Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment.Atmospheric Environment,242.
MLA	Zimmerman A.,et al."Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment".Atmospheric Environment 242(2020).