Shear-flow induced secondary circulation in parallel underwater topographic corrugation and its application to satellite image interpretation

doi:10.1007/s11802-012-2093-5

	Shear-flow induced secondary circulation in parallel underwater topographic corrugation and its application to satellite image interpretation
	Zheng Quanan 2,5; Zhao Qing 1,3,4; Yuan Yeli 5; Liu Xian 6; Hu Jianyu 7; Liu Xuehai 5; Yin Liping 5; Ye Xiaomin 8
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2012-12
卷号	11 期号:4 页码:427-435
关键词	secondary circulation Bohai Sea submerged sand ridges satellite images
ISSN号	1672-5182
DOI	10.1007/s11802-012-2093-5
英文摘要	This study aims to figure out satellite imaging mechanisms for submerged sand ridges in the shallow water region in the case of the flow parallel to the topography corrugation. Solving the disturbance governing equations of the shear-flow yields the analytical solutions of the secondary circulation. The solutions indicate that a flow with a parabolic horizontal velocity shear and a sinusoidal vertical velocity shear will induce a pair of vortexes with opposite signs distributed symmetrically on the two sides of central line of a rectangular canal. In the case of the presence of surface Ekman layer with the direction of Ekman current opposite to (coincident with) the mean flow, the two vortexes converge (diverge) at the central line of canal in the upper layer and form a surface current convergent (divergent) zone along the central line of the canal. In the case of the absence of surface Ekman layer, there is no convergent (divergent) zone formed over the sea surface. The theoretical results are applied to interpretations of three convergent cases, one divergent case and statistics of 27 cases of satellite observations in the submerged sand ridge region of the Liaodong Shoal in the Bohai Sea. We found that the long, finger-like, bright patterns on SAR images are corresponding to the locations of the canals (or tidal channels) formed by two adjacent sand ridges rather than the sand ridges themselves.
资助项目	US National Science Foundation[0962107] ; US National Science Foundation[1061998]
WOS关键词	SYNTHETIC-APERTURE RADAR ; SUBMARINE SAND WAVES ; WATER BOTTOM TOPOGRAPHY ; CONTINENTAL-SHELF ; BOHAI SEA ; MODEL ; BATHYMETRY ; SURFACE ; EAST
WOS研究方向	Oceanography
语种	英语
出版者	OCEAN UNIV CHINA
WOS记录号	WOS:000310374500001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25379]
专题	自然资源部第一海洋研究所
通讯作者	Zhao Qing
作者单位	1.E China Normal Univ, Minist Educ, Key Lab Geog Informat Sci, Shanghai 200062, Peoples R China 2.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA 3.E China Normal Univ, Joint Lab Environm Remote Sensing & Data Assimila, Shanghai 200062, Peoples R China 4.Chinese Acad Sci, CEODE, Shanghai 200062, Peoples R China 5.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 6.Univ Maryland, Dept Mech Engn, College Pk, MD 20742 USA 7.Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China 8.State Ocean Adm, Natl Ctr Satellite Applicat Oceans, Beijing 100860, Peoples R China
推荐引用方式 GB/T 7714	Zheng Quanan,Zhao Qing,Yuan Yeli,et al. Shear-flow induced secondary circulation in parallel underwater topographic corrugation and its application to satellite image interpretation[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2012,11(4):427-435.
APA	Zheng Quanan.,Zhao Qing.,Yuan Yeli.,Liu Xian.,Hu Jianyu.,...&Ye Xiaomin.(2012).Shear-flow induced secondary circulation in parallel underwater topographic corrugation and its application to satellite image interpretation.JOURNAL OF OCEAN UNIVERSITY OF CHINA,11(4),427-435.
MLA	Zheng Quanan,et al."Shear-flow induced secondary circulation in parallel underwater topographic corrugation and its application to satellite image interpretation".JOURNAL OF OCEAN UNIVERSITY OF CHINA 11.4(2012):427-435.