Characteristics of regional new particle formation in urban and regional   background environments in the North China Plain

doi:10.5194/acp-13-12495-2013

CORC > 北京大学 > 环境科学与工程学院

	Characteristics of regional new particle formation in urban and regional background environments in the North China Plain
	Wang, Z. B. ; Hu, M. ; Sun, J. Y. ; Wu, Z. J. ; Yue, D. L. ; Shen, X. J. ; Zhang, Y. M. ; Pei, X. Y. ; Cheng, Y. F. ; Wiedensohler, A.
刊名	atmospheric chemistry and physics
	2013
关键词	NUMBER SIZE DISTRIBUTIONS ATMOSPHERIC AEROSOL-PARTICLES NUCLEATION MODE PARTICLES PEARL RIVER-DELTA AIR-MASS HISTORY LONG-TERM FORMATION EVENTS BOUNDARY-LAYER SULFURIC-ACID MOUNTAIN SITE
DOI	10.5194/acp-13-12495-2013
英文摘要	Long-term measurements of particle number size distributions were carried out both at an urban background site (Peking University, PKU) and a regional Global Atmospheric Watch station (Shangdianzi, SDZ) from March to November in 2008. In total, 52 new particle formation (NPF) events were observed simultaneously at both sites, indicating that this is a regional phenomenon in the North China Plain. On average, the mean condensation sink value before the nucleation events started was 0.025 s(-1) in the urban environment, which was 1.6 times higher than that at regional site. However, higher particle formation and growth rates were observed at PKU (10.8 cm(-3) s(-1) and 5.2 nm h(-1)) compared with those at SDZ (4.9 cm(-3) s(-1) and 4.0 nm h(-1)). These results implied that precursors were much more abundant in the polluted urban environment. Different from the observations in cleaner environments, the background conditions of the observed particle homogeneous nucleation events in the North China Plain could be characterized as the co-existing of a stronger source of precursor gases and a higher condensational sink of pre-existing aerosol particles. Secondary aerosol formation following nucleation events results in an increase of particle mass concentration, particle light scattering coefficient, and cloud condensation nuclei (CCN) number concentration, with consequences on visibility, radiative effects, and air quality. Typical regional NPF events with significant particle nucleation rates and subsequent particle growth over a sufficiently long time period at both sites were chosen to investigate the influence of NPF on the number concentration of "potential" CCN. As a result, the NPF and the subsequent condensable growth increased the CCN number concentration in the North China Plain by factors in the range from 5.6 to 8.7. Moreover, the potential contribution of anthropogenic emissions to the CCN number concentration was more than 50 %, to which more attention should be drawn in regional and global climate modeling, especially in the polluted urban areas.; Meteorology & Atmospheric Sciences; SCI(E); 6; ARTICLE; 24; 12495-12506; 13
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/324398]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Wang, Z. B.,Hu, M.,Sun, J. Y.,et al. Characteristics of regional new particle formation in urban and regional background environments in the North China Plain[J]. atmospheric chemistry and physics,2013.
APA	Wang, Z. B..,Hu, M..,Sun, J. Y..,Wu, Z. J..,Yue, D. L..,...&Wiedensohler, A..(2013).Characteristics of regional new particle formation in urban and regional background environments in the North China Plain.atmospheric chemistry and physics.
MLA	Wang, Z. B.,et al."Characteristics of regional new particle formation in urban and regional background environments in the North China Plain".atmospheric chemistry and physics (2013).