Observed interannual variability of the Kuroshio and Luzon Undercurrent associated with tropical and subtropical wind forcing

doi:10.1016/j.pocean.2023.103146

IOCAS-IR > 海洋环流与波动重点实验室

	Observed interannual variability of the Kuroshio and Luzon Undercurrent associated with tropical and subtropical wind forcing
	Ma, Jie 1,2; Zhang, Zhanqing 1,3; Hu, Shijian 1,2,3; Villanoy, Cesar 4; Guo, Xinying 1,3; Wang, Fan1,2,3 ; Hu, Dunxin 1,2,3
	2023-12-01
发表期刊	PROGRESS IN OCEANOGRAPHY
ISSN	0079-6611
卷号	219 页码:14
通讯作者	Hu, Shijian([email protected])
摘要	The interannual variability of the Kuroshio and Luzon Undercurrent (LUC) east of the Luzon Island is examined using observations from a moorings during December 2010-October 2012 and three moorings during January 2018-May 2020 deployed at 18 degrees N. Measurements from acoustic Doppler current profiler (ADCP) equipped on the moorings indicate that the interannual variations of upper-layer Kuroshio and lower-layer LUC were in phase. The interannual variability is strong in the Kuroshio but weakens substantially in the LUC. A proxy of the Kuroshio and LUC based on sea level slope is developed and validated by comparing the ADCP and satellite altimeter measurements. The proxy during 1993-2020 shows that the interannual sea level slope across the Kuroshio is primarily associated with sea level fluctuations on its eastern flank. Diagnostic analysis and nu-merical sensitivity experiments using a simplified ocean model indicate that the wind forcing in the subtropical northwestern Pacific Ocean played an essential role in the interannual variability of Kuroshio and LUC's strength and water mass properties during the observation periods in 2011 and 2018-2020, although the tropical winds dominated the interannual variability of the two boundary currents during most time of the past three decades (1993-2020). The mooring observations show that the subsurface water mass in the LUC at the depth of about 650-800 m experienced a considerable freshening event from July 2019 until at least January 2020 due to abnormally strong subtropical wind forcing.
关键词	Western North Pacific Western boundary currents Interannual variability Wind forcing Observations
DOI	10.1016/j.pocean.2023.103146
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42006002]; National Natural Science Foundation of China[42022040]; Shandong Provincial Natural Science Foundation[ZR2020JQ18]; Strategic Priority Research Program of CAS[XDB42010403]; China Postdoctoral Science Foundation[2021T140674]; CAS Interdisciplinary Innovation Team[JCTD-2020-12]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001099192000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	NORTH EQUATORIAL CURRENT ; WESTERN BOUNDARY CURRENTS ; MINDANAO CURRENT ; SEASONAL VARIABILITY ; SEA-LEVEL ; BIFURCATION ; CIRCULATION ; EAST ; SYSTEM ; COAST
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/337002/183907
专题	海洋环流与波动重点实验室
通讯作者	Hu, Shijian
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Laoshan Lab, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Univ Philippines Diliman, Quezon City, Philippines
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Ma, Jie,Zhang, Zhanqing,Hu, Shijian,et al. Observed interannual variability of the Kuroshio and Luzon Undercurrent associated with tropical and subtropical wind forcing[J]. PROGRESS IN OCEANOGRAPHY,2023,219:14.
APA	Ma, Jie.,Zhang, Zhanqing.,Hu, Shijian.,Villanoy, Cesar.,Guo, Xinying.,...&Hu, Dunxin.(2023).Observed interannual variability of the Kuroshio and Luzon Undercurrent associated with tropical and subtropical wind forcing.PROGRESS IN OCEANOGRAPHY,219,14.
MLA	Ma, Jie,et al."Observed interannual variability of the Kuroshio and Luzon Undercurrent associated with tropical and subtropical wind forcing".PROGRESS IN OCEANOGRAPHY 219(2023):14.

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