Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015

doi:10.1029/2021JC017194

IOCAS-IR > 海洋环流与波动重点实验室

	Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015
	Wang, Qingye 1,2,3; Yuan, Xin1,3,4 ; Hu, Dunxin 1,2,3; Sasaki, Hideharu 5
	2021-07-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	126 期号:7 页码:21
通讯作者	Wang, Qingye([email protected])
摘要	Intraseasonal variability in the Kuroshio east of Taiwan was studied using moored observations at 23 degrees N, 122 degrees E from November 17, 2014 to September 5, 2015, high-resolution ocean model data, and altimetry data. It is found for the first time that the observed meridional velocity has a peak signal at 50-60 days with a significant maximum variation at 200-600 m depth. Model outputs show that the 50-60-day variability at the mooring station is related to meandering of the Kuroshio at 23 degrees N. Both surface eddies, which can extend downward to similar to 1,000 m depth, and coastal cold water upwelling associated with cyclonic eddies from deep layers can greatly change the isopycnal slope below similar to 200 m depth at 23 degrees N, 122 degrees E, and their joint effect results in the maximum variation at 200-600 m depth. Ocean eddies southeast of Taiwan propagate northward along the current axis of the Kuroshio and have a large impact on intraseasonal variability. Case analysis indicates that the formation of ocean eddies or upwelling near the coast may be related to the Ludao and Lanyu islands southeast of Taiwan or Kuroshio transport along the southern tip of Taiwan. In addition, the evolution of subsurface meridional velocity from mooring observations is inconsistent with that of the surface but is closely related to the evolution of local temperature below the seasonal thermocline. The maximum intraseasonal variability below the seasonal thermocline highlights the complex dynamics in the Kuroshio east of Taiwan.
DOI	10.1029/2021JC017194
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41976011]; National Key Research and Development Program of China[2017YFA0604102]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000681412200031
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/175942
专题	海洋环流与波动重点实验室
通讯作者	Wang, Qingye
作者单位	1.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci Technol Qingdao, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.Japan Agcy Marine Earth Sci & Technol, Applicat Lab, Yokohama, Kanagawa, Japan
第一作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
通讯作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Wang, Qingye,Yuan, Xin,Hu, Dunxin,et al. Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2021,126(7):21.
APA	Wang, Qingye,Yuan, Xin,Hu, Dunxin,&Sasaki, Hideharu.(2021).Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,126(7),21.
MLA	Wang, Qingye,et al."Stronger Intraseasonal Variability Observed Below the Seasonal Thermocline in the Kuroshio East of Taiwan During 2014 and 2015".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 126.7(2021):21.

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