Insights into a dust event transported through Beijing in spring 2012:   Morphology, chemical composition and impact on surface aerosols

doi:10.1016/j.scitotenv.2016.04.175

CORC > 北京大学 > 环境科学与工程学院

	Insights into a dust event transported through Beijing in spring 2012: Morphology, chemical composition and impact on surface aerosols
	Hu, Wei ; Niu, Hongya ; Zhang, Daizhou ; Wu, Zhijun ; Chen, Chen ; Wu, Yusheng ; Shang, Dongjie ; Hu, Min
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2016
关键词	Dust Optical property Particle size distribution New particle formation Accumulation mode particle PARTICLE FORMATION MINERAL DUST ATMOSPHERIC AEROSOLS NORTHERN CHINA AIR-QUALITY STORM GROWTH ASIA POLLUTION AFRICAN
DOI	10.1016/j.scitotenv.2016.04.175
英文摘要	Multiple approaches were used to investigate the evolution of surface aerosols in Beijing during the passage of a dust event at high altitude, which was from the Gobi areas of southern Mongolia and covered a wide range of North China. Single particle analysis with electron microscope showed that the majority of coarse particles were mineral ones, and most of them were in the size range of 1-7 mu m with a peak of number concentration at about 3.5 mu m. Based on elemental composition and morphology, the mineral particles could be classified into several groups, including Si-rich (71%), Ca-rich (15%), Fe-rich (6%), and halite-rich (2%), etc., and they were the main contributors to the aerosol optical depth as the dust occurred. The sizedistributions of surface aerosols were significantly affected by the dust intrusion. The average number concentration of accumulation mode particles during the event was about 400 cm(-3), which was much lower than that in heavily polluted days (6300 cm(-3)). At the stage of floating dust, the number concentration of accumulation mode particles decreased, and coarse particles contributed to total volume concentration of particulate matter as much as 90%. The accumulation mode particles collected in this stage were mostly in the size range of 0.2-0.5 mu m, and were rectangular or spherical. They were considered to be particles consisting of ammonium sulfate. New particle formation (NPF) was observed around noon in the three days during the dust event, indicating that the passage of the dust was probably favorable for NPF. (C) 2016 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [91544214, 41541038, 21190052]; Education Bureau of Hebei Province for Excellent Young Scholars [YQ2014020]; Natural Science Foundation of Hebei Province [D2016402120]; State Scholarship Fund of Chinese Scholarship Council (CSC) [201406010350]; SCI(E); EI; PubMed; ARTICLE; minhu@pku.edu.cn; 287-298; 565
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/433749]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Hu, Wei,Niu, Hongya,Zhang, Daizhou,et al. Insights into a dust event transported through Beijing in spring 2012: Morphology, chemical composition and impact on surface aerosols[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016.
APA	Hu, Wei.,Niu, Hongya.,Zhang, Daizhou.,Wu, Zhijun.,Chen, Chen.,...&Hu, Min.(2016).Insights into a dust event transported through Beijing in spring 2012: Morphology, chemical composition and impact on surface aerosols.SCIENCE OF THE TOTAL ENVIRONMENT.
MLA	Hu, Wei,et al."Insights into a dust event transported through Beijing in spring 2012: Morphology, chemical composition and impact on surface aerosols".SCIENCE OF THE TOTAL ENVIRONMENT (2016).