Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment

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, Alyssa; Petters, Markus D.; Meskhidze, Nicholas
	2020-12
发表期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
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.
关键词	Urban aerosol New particle formation Sub-10 nm aerosol Air pollution
DOI	10.1016/j.atmosenv.2020.117835
WOS关键词	CONTINENTAL BOUNDARY-LAYER ; NUMBER SIZE DISTRIBUTIONS ; ULTRAFINE PARTICLES ; NUCLEATION EVENTS ; INTERNATIONAL-AIRPORT ; FREE TROPOSPHERE ; VERTICAL EXTENT ; FINE PARTICLES ; AIR-QUALITY ; CONDENSATION
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
专题	新冠肺炎循证社会科学证据集成
作者单位	North Carolina State Univ
推荐引用方式 GB/T 7714	Zimmerman, Alyssa,Petters, Markus D.,Meskhidze, Nicholas. Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment[J]. ATMOSPHERIC ENVIRONMENT,2020.
APA	Zimmerman, Alyssa,Petters, Markus D.,&Meskhidze, Nicholas.(2020).Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment.ATMOSPHERIC ENVIRONMENT.
MLA	Zimmerman, Alyssa,et al."Observations of new particle formation, modal growth rates, and direct emissions of sub-10 nm particles in an urban environment".ATMOSPHERIC ENVIRONMENT (2020).