Arid
DOI10.1007/s00376-009-9015-5
Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer
Han Bo; Lue Shihua; Ao Yinhuan
通讯作者Han Bo
来源期刊ADVANCES IN ATMOSPHERIC SCIENCES
ISSN0256-1530
EISSN1861-9533
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
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000276839600013
WOS关键词ATMOSPHERIC BOUNDARY-LAYER ; MONIN-OBUKHOV SIMILARITY ; HEAT-FLUX ; 1976 ITCE ; BUDGETS ; DESERT ; SYSTEM ; ENERGY ; MODEL ; SCALE
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
来源机构中国科学院西北生态环境资源研究院
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/162942
作者单位Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714
Han Bo,Lue Shihua,Ao Yinhuan. Analysis on the Interaction between Turbulence and Secondary Circulation of the Surface Layer at Jinta Oasis in Summer[J]. 中国科学院西北生态环境资源研究院,2010,27(3):605-620.
APA Han Bo,Lue 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.
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