Observation of Bottom-Trapped Topographic Rossby Waves to the West of the Luzon Strait, South China Sea

doi:10.1175/JPO-D-22-0065.1

IOCAS-IR > 海洋环流与波动重点实验室

	Observation of Bottom-Trapped Topographic Rossby Waves to the West of the Luzon Strait, South China Sea
	Zheng, Hua 1,2; Zhu, Xiao-Hua 1,2,3; Chen, Juntian 2; Wang, Min 1,2; Zhao, Ruixiang 2; Zhang, Chuanzheng 2; Zhu, Ze-Nan 2; Ren, Qiang4,5 ; Liu, Yansong 4,5,6; Nan, Feng 4,5,6; Yu, Fei 4,5,6,7
	2022-11-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	52 期号:11 页码:2853-2872
通讯作者	Zhu, Xiao-Hua(xhzhu@sio.org.cn)
摘要	Topographic Rossby waves (TRWs) play an important role in deep-ocean dynamics and abyssal intraseasonal variations. Observational records from 15 current- and pressure-recording inverted echo sounders (CPIESs) and two moorings deployed in the northern Manila Trench (MT), South China Sea (SCS), for over 400 days were utilized to analyze the widely existing near-21-day bottom-trapped TRWs in the trench. The TRWs were generally generated in winter and summer, dominated by perturbations in the upper ocean. Kuroshio intrusion and its related variabilities contributed to the perturbations in winter, whereas the perturbations generated north of Luzon Island dominated in summer. Eddies north of Luzon propagated northwestward in the summer of 2018; however, these eddies caused the Kuroshio meanderings in the Luzon Strait (LS) in the summer of 2019. The variations in the Kuroshio path and the Kuroshio-related eddies induced TRWs in the deep ocean in regions with steep topography. However, the spatiotemporal distributions of TRWs were complex owing to the propagation of the waves. Some cases of TRWs showed no relation to the local upper-layer perturbations but propagated from adjacent regions. Some of these TRWs were induced by perturbations in the upper ocean in adjacent regions, and propagated anticlockwise in the MT with shallow water to their right, while others may be related to the intraseasonal variations in deep-water overflow in the LS and propagated northward. This study suggests that the Kuroshio and Kuroshio-related eddies significantly contribute to the dynamic processes associated with intraseasonal variations in the deep SCS through the generation of TRWs. Significance StatementTopographic Rossby waves (TRWs) are fluctuations generated when water columns travel across sloping topography under potential vorticity conservation. Based on observations of 15 current- and pressure-recording inverted echo sounders (CPIESs) and two moorings in the northern Manila Trench (MT) in the South China Sea (SCS), TRWs with periods of approximately 21 days were observed and analyzed. This study describes the generation, propagation, and spatiotemporal distribution of TRWs west of the LS and confirms that regional Kuroshio meanderings and upper eddies play important roles in the dynamic processes associated with intraseasonal variations in the deep SCS; the study may thus contribute to knowledge on the dynamic response of the abyssal current to mesoscale perturbations in the upper ocean.
关键词	Abyssal circulation In situ oceanic observations Intraseasonal variability
DOI	10.1175/JPO-D-22-0065.1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41920104006] ; National Natural Science Foundation of China[41906024] ; Scientific Research Fund of Second Institute of Oceanography, MNR[JZ2001] ; Scientific Research Fund of Second Institute of Oceanography, MNR[QNYC2102] ; Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography[SOEDZZ2106] ; Project of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography[SOEDZZ2207] ; Oceanic Interdisciplinary Program of Shanghai Jiao Tong University[SL2021MS021] ; Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)[311020004] ; Global Climate Changes and Air-sea Interaction Program[GASI-02-PAC-ST-Wwin]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000884471500016
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：8[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/337002/180345
专题	海洋环流与波动重点实验室
通讯作者	Zhu, Xiao-Hua
作者单位	1.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China 2.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves d, Qingdao, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 6.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China 7.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zheng, Hua,Zhu, Xiao-Hua,Chen, Juntian,et al. Observation of Bottom-Trapped Topographic Rossby Waves to the West of the Luzon Strait, South China Sea[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2022,52(11):2853-2872.
APA	Zheng, Hua.,Zhu, Xiao-Hua.,Chen, Juntian.,Wang, Min.,Zhao, Ruixiang.,...&Yu, Fei.(2022).Observation of Bottom-Trapped Topographic Rossby Waves to the West of the Luzon Strait, South China Sea.JOURNAL OF PHYSICAL OCEANOGRAPHY,52(11),2853-2872.
MLA	Zheng, Hua,et al."Observation of Bottom-Trapped Topographic Rossby Waves to the West of the Luzon Strait, South China Sea".JOURNAL OF PHYSICAL OCEANOGRAPHY 52.11(2022):2853-2872.

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