干旱区生态环境知识资源中心(Arid): 半干旱区沙尘天气近地层湍流通量及起沙研究

Arid

	半干旱区沙尘天气近地层湍流通量及起沙研究
其他题名	Research of Turbulent Flux and Dust Emission During Sand-dust Events in Surface Boundary Layer over Semiarid Area
	周悦; 牛生杰; 邱玉珺
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2010
卷号	30 期号:5 页码:1194-1199
中文摘要	利用2005 年春季朱日和气象站20m气象塔的观测资料,结合同期的PM10质量浓度资料,分析了半干旱地区不同沙尘天气下近地层湍流通量的变化特征以及PM10质量浓度与起沙之间的关系. 结果表明,动量通量在 15:00左右达到极大值;感热通量在白天为正值,中午12:00左右达到峰值,而晚上变为负值,并在凌晨达到谷值;由于3 月份下垫面湿度大,导致潜热通量经常全天为正值,并在16:00左右达到峰值;PM10质量浓度与摩擦速度的二次方呈正比,临界起沙风速和临界摩擦速度分别为7m·s~(-1) 和0.7m·s~(-1)
英文摘要	The characteristics of meteorological elements of atmospheric surface layer during sand-dust events are studied based on the observational data obtained from20m meteorological tower in Zhurihe Meteorological Station of Inner Mongolia in spring of 2005 and in combining with the mass concentration of PM10 data a comprehensive analysis is conducted. We analyze the variation features of turbulent fluxes and the relationship between the mass concentration of PM10and dust emission during different sand-dust events over atmosphere surface layer. It was found that 1 The momentum flux reaches the maximum at about 1500 BST2 The value of sensible heat flux is positive during the daytime and reaches the maximum at 1200 BST while the value changes to be negative during the nighttime and get the minimum at 2400BST 3 Because the soil moisture is relatively high on March the value of latent heat flux is positive during the whole daytime and reaches the maximum at1600BST4 The mass concentration of PM10is approximately proportional to the second power of friction velocity and the threshold values of wind speed and friction velocity are found to be about 7 m·s~(-1)and0.7 m·s~(-1)respectively
中文关键词	沙尘天气 ; 湍流通量 ; 动量通量 ; 摩擦速度 ; 临界摩擦速度
英文关键词	sand-dust event turbulent flux momentum flux friction velocity threshold friction velocity
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3981748
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378700
作者单位	周悦, 南京信息工程大学, 气象灾害省部共建教育部重点实验室, 南京, 江苏 210044, 中国.; 牛生杰, 南京信息工程大学, 气象灾害省部共建教育部重点实验室, 南京, 江苏 210044, 中国.; 邱玉珺, 南京信息工程大学, 气象灾害省部共建教育部重点实验室, 南京, 江苏 210044, 中国.
推荐引用方式 GB/T 7714	周悦,牛生杰,邱玉珺. 半干旱区沙尘天气近地层湍流通量及起沙研究[J],2010,30(5):1194-1199.
APA	周悦,牛生杰,&邱玉珺.(2010).半干旱区沙尘天气近地层湍流通量及起沙研究.中国沙漠,30(5),1194-1199.
MLA	周悦,et al."半干旱区沙尘天气近地层湍流通量及起沙研究".中国沙漠 30.5(2010):1194-1199.