干旱区生态环境知识资源中心(Arid): Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer

Arid

	Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer
	Han Bo*; Lu Shihua; Ao Yinhuan
来源期刊	Advances in Atmospheric Sciences
ISSN	0256-1530
出版年	2010
卷号	27 期号:3 页码:605-620
英文摘要	The kinetic energy variations of mean flow and turbulence at three levels in the surface layer were calculated by using eddy covariance data from observations at Jinta oasis in 2005 summer. It is found that when the mean horizontal flow was stronger, the turbulent kinetic energy was increased at all levels, as well as the downward mean wind at the middle level. Since the mean vertical flow on the top and bottom were both negligible at that time, there was a secondary circulation with convergence in the upper half and divergence in the lower half of the column. After consideration of energy conversion, it was found that the interaction between turbulence and the secondary circulation caused the intensification of each other. The interaction reflected positive feedback between turbulence and the vertical shear of the mean flow. Turbulent sensible and latent heat flux anomaly were also analyzed. The results show that in both daytime and at night, when the surface layer turbulence was intensified as a result of strengthened mean flow, the sensible heat flux was decreased while the latent heat flux was increased. Both anomalous fluxes contributed to the cold island effect and the moisture island effect of the oasis.
英文关键词	heterogeneous atmospheric boundary layer turbulent kinetic energy equations energy conversion secondary circulation oasis effect
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Physics
CSCD记录号	CSCD:3891858
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335055
作者单位	Han Bo*, Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences.; Lu Shihua, Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences.; Ao Yinhuan, Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Han Bo*,Lu Shihua,Ao Yinhuan. Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer[J],2010,27(3):605-620.
APA	Han Bo*,Lu Shihua,&Ao Yinhuan.(2010).Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer.Advances in Atmospheric Sciences,27(3),605-620.
MLA	Han Bo*,et al."Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer".Advances in Atmospheric Sciences 27.3(2010):605-620.