干旱区生态环境知识资源中心(Arid): Aerosol structure and vertical distribution in a multi-source dust region

Arid

	Aerosol structure and vertical distribution in a multi-source dust region
	Zhang Jie; Zhang Qiang; Tang Congguo; Han Yongxiang
来源期刊	Journal of Environmental Sciences
ISSN	1001-0742
出版年	2012
卷号	24 期号:8 页码:1466-1475
英文摘要	The vertical distribution of aerosols was directly observed under various atmospheric conditions in the free troposphere using surface micro-pulse lidar(MPL4) at the Zhangye Station(39.08 N,100.27 E) in western China in the spring of 2008.The study shows that the aerosol distribution over Zhangye can be vertically classified into upper,middle and lower layers with altitudes of 4.5 to 9 km,2.5 to 4.5 km,and less than 2.5 km,respectively.The aerosol in the upper layer originated from the external sources at higher altitude regions,from far desert regions upwind of Zhangye or transported from higher atmospheric layers by free convection,and the altitude of this aerosol layer decreased with time;the aerosols in the middle and lower layers originated from both external and local sources.The aerosol extinction coefficients in the upper and lower layers decreased with altitude,whereas the coefficient in the middle layer changed only slightly,which suggests that aerosol mixing occurs in the middle layer.The distribution of aerosols with altitude has three features:a single peak that forms under stable atmospheric conditions,an exponential decrease with altitude that occurs under unstable atmospheric conditions,and slight change in the mixed layer.Due to the impact of the top of the atmospheric boundary layer,the diurnal variation in the aerosol extinction coefficient has a single peak,which is higher in the afternoon and lower in the morning.
英文关键词	aerosol profile distribution shape upper boundary
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4595257
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335155
作者单位	Zhang Jie, Nanjing University of Information Science & Technology, Key Laboratory of Meteorological Disaster,Ministry of Education and Jiangsu Province, Nanjing, Jiangsu 210044, China.; Tang Congguo, Nanjing University of Information Science & Technology, Key Laboratory of Meteorological Disaster,Ministry of Education and Jiangsu Province, Nanjing, Jiangsu 210044, China.; Han Yongxiang, Nanjing University of Information Science & Technology, Key Laboratory of Meteorological Disaster,Ministry of Education and Jiangsu Province, Nanjing, Jiangsu 210044, China.; Zhang Qiang, Institute of Arid Meteorology,China Meteorological Administration, Lanzhou, Gansu 730020, China.
推荐引用方式 GB/T 7714	Zhang Jie,Zhang Qiang,Tang Congguo,et al. Aerosol structure and vertical distribution in a multi-source dust region[J],2012,24(8):1466-1475.
APA	Zhang Jie,Zhang Qiang,Tang Congguo,&Han Yongxiang.(2012).Aerosol structure and vertical distribution in a multi-source dust region.Journal of Environmental Sciences,24(8),1466-1475.
MLA	Zhang Jie,et al."Aerosol structure and vertical distribution in a multi-source dust region".Journal of Environmental Sciences 24.8(2012):1466-1475.