Vertical Structure and Seasonal Variability of Shear on the Southwestern Continental Slope of the East China Sea

doi:10.3390/jmse10070902

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Vertical Structure and Seasonal Variability of Shear on the Southwestern Continental Slope of the East China Sea
	Ouyang, Zhiling 2,3,4; Liu, Ze 1,2,4; Hou, Yijun 1,2,3,4
刊名	JOURNAL OF MARINE SCIENCE AND ENGINEERING
	2022-07-01
卷号	10 期号:7 页码:24
关键词	ocean shear seasonal variability internal tides near-inertial waves Kuroshio East China Sea
DOI	10.3390/jmse10070902
通讯作者	Hou, Yijun(yjhou@qdio.ac.cn)
英文摘要	The vertical structure and seasonal variability of shear were examined using nearly three years of mooring ADCP (acoustic Doppler current profiler) data on the southwestern continental slope of the East China Sea (ECS). Shear spectra suggest that the sub-inertial currents (SICs); near-inertial waves (NIWs); and diurnal (D1), semidiurnal (D2), and tridiurnal (D3) internal tides (ITs) dominate the local shear field. The shear exhibits a remarkable surface-intensified pattern with high values occurring mostly in the upper 200 m. Significant seasonal variations can be found in the shear, but with differences between the upper (50-200 m averaged) and lower layers (210-570 m averaged). Satellite altimeter data indicate that the meander of the Kuroshio mainstream and the Kuroshio intrusion affect the seasonal variation of total shear by mainly influencing the shear caused by SICs. In addition, the shear efficiency (SE) of D2 ITs is obviously less than that of NIWs and that of D1 and D3 ITs via analyzing the kinetic energy (KE) densities and shear caused by these motions, since the predominant mode of the former is the first baroclinic mode, while the latter is dominated by higher baroclinic modes with large vertical wavenumbers. Moreover, the SE of incoherent ITs is relatively stronger than that of coherent ITs as a result of a larger proportion of high baroclinic modes in the incoherent component compared to the coherent component, based on modal decomposition.
资助项目	National Natural Science Foundation of China[42076002] ; National Natural Science Foundation of China[41776020] ; National Natural Science Foundation of China[41630967]
WOS研究方向	Engineering ; Oceanography
语种	英语
出版者	MDPI
WOS记录号	WOS:000833608300001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179832]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Hou, Yijun
作者单位	1.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Ouyang, Zhiling,Liu, Ze,Hou, Yijun. Vertical Structure and Seasonal Variability of Shear on the Southwestern Continental Slope of the East China Sea[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2022,10(7):24.
APA	Ouyang, Zhiling,Liu, Ze,&Hou, Yijun.(2022).Vertical Structure and Seasonal Variability of Shear on the Southwestern Continental Slope of the East China Sea.JOURNAL OF MARINE SCIENCE AND ENGINEERING,10(7),24.
MLA	Ouyang, Zhiling,et al."Vertical Structure and Seasonal Variability of Shear on the Southwestern Continental Slope of the East China Sea".JOURNAL OF MARINE SCIENCE AND ENGINEERING 10.7(2022):24.