Pollution characteristics of atmospheric fine particles and their   secondary components in the atmosphere of Shenzhen in summer and in   winter

doi:10.1007/s11426-006-2010-0

CORC > 北京大学 > 环境科学与工程学院

	Pollution characteristics of atmospheric fine particles and their secondary components in the atmosphere of Shenzhen in summer and in winter
	Niu Yuwen ; He Lingyan ; Hu Min ; Zhang Jing ; Zhao Yunliang
刊名	中国科学b辑化学英文版
	2006
关键词	PM2.5 mass concentration secondary pollution seasonal variation Shenzhen ORGANIC-CARBON CONCENTRATIONS RIVER DELTA REGION HONG-KONG ELEMENTAL CARBON PM10 AEROSOLS PM2.5 CHINA URBAN SHANGHAI PERIOD
DOI	10.1007/s11426-006-2010-0
英文摘要	Two field measurements for atmospheric fine particles were conducted in Baoan district of Shenzhen during the summer and winter in 2004. Totally 30 sets of 24 h samples were collected, and then the mass concentrations and chemical compositions were determined. The seasonal variations and secondary pollution characteristics of fine particles during the sampling periods were discussed with meteorological factors. The results show that seasonal variations of atmospheric particles are significant in Shenzhen. The average mass concentrations of PM2.5 and PM10 in summer were 35 mu g(.)m(-3) and 57 mu g(.)m(-3), respectively, and those in winter were 99 mu g(.)m(-3) and 135 mu g(.)m(-3), respectively. The concentrations of both PM2.5 and PM10 in winter increased 184% and 137%, respectively, compared to those in summer. PM2.5 accounted for 61 % and 75% of PM10 in summer and in winter, respectively, indicating severe fine particle pollution in Shenzhen. During the summer and winter sampling periods, the mean OC/EC ratios were 3.4 and 1.6, respectively. The estimated secondary organic carbon (SOC) averagely accounted for 56% and 6% of the total OC in summer and in winter, respectively, which implies a major contribution of SOC to OC in summer. During the continuous high temperature period in summer, both the concentrations and fractions of secondary aerosol components in PM2.5 were highly elevated, suggesting severe secondary pollution again. The prevailing wind was from South China Sea in summer, and the air quality was good. The prevailing wind in winter was from Mainland China to the north, and the polluted air mass led to poor air quality.; Chemistry, Multidisciplinary; SCI(E); EI; 13; ARTICLE; 5; 466-474; 49
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/251553]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Niu Yuwen,He Lingyan,Hu Min,et al. Pollution characteristics of atmospheric fine particles and their secondary components in the atmosphere of Shenzhen in summer and in winter[J]. 中国科学b辑化学英文版,2006.
APA	Niu Yuwen,He Lingyan,Hu Min,Zhang Jing,&Zhao Yunliang.(2006).Pollution characteristics of atmospheric fine particles and their secondary components in the atmosphere of Shenzhen in summer and in winter.中国科学b辑化学英文版.
MLA	Niu Yuwen,et al."Pollution characteristics of atmospheric fine particles and their secondary components in the atmosphere of Shenzhen in summer and in winter".中国科学b辑化学英文版 (2006).