Seasonal Link Between Deepwater Overflow Through the Luzon Strait and Deep Western Boundary Current in the Philippine Sea

doi:10.1029/2023GL105405

IOCAS-IR > 海洋环流与波动重点实验室

	Seasonal Link Between Deepwater Overflow Through the Luzon Strait and Deep Western Boundary Current in the Philippine Sea
	Xu, Qinbo 1; Zhang, Linlin 1,2; Xiao, Xin 3,4; Zhou, Chun 2,3,4; Wang, Fan1,2 ; Hu, Dunxin 1,2
	2023-09-28
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	50 期号:18 页码:9
通讯作者	Zhang, Linlin([email protected]) ; Zhou, Chun([email protected])
摘要	The cold dense water from the Pacific sinks to the deep South China Sea (SCS) through the Luzon Strait, driving the abyssal and overturning circulations in the SCS, and affecting the Indonesia Throughflow and its associated heat and freshwater fluxes. Combining the ocean bottom pressure data and the hydrographic data, we reveal the seasonal link between Luzon Strait deepwater overflow (LSDO) and deep western boundary current (DWBC) in the Philippine Sea. The seasonal variation in the DWBC dominates the pressure difference between the Pacific and the SCS by adjusting the temperature field on the east side of the Luzon Strait, which in turn contributes to the seasonal variation in the LSDO. The enhanced DWBC in summer/autumn carries more relatively cold water from the high latitudes to the east of the Luzon Strait, increasing the local density and leading to the enhancement of the LSDO in autumn. The Luzon Strait deepwater overflow (LSDO), as the only deep connection between Pacific and South China Sea (SCS), plays a pivotal role in the abyssal and overturning circulations in the SCS. However, the mechanism of the seasonal variation in the LSDO has not been fully understood. Based on long-term ocean bottom pressure data and the hydrographic data, the seasonal variation in the LSDO due to the variability of the deep western boundary current (DWBC) in the Philippine Sea is revealed. The seasonal variation in the DWBC induces the variation of temperature field on the east side of the Luzon Strait through advection process, which in turn dominates the variation of the pressure difference between Pacific and SCS, and finally leads to the seasonal variation in the LSDO. This result links the temporal variability of the deep ocean circulation in the Philippine Sea and SCS, and promotes our understanding of the dynamics of the LSDO variations. An ocean bottom pressure evidence on seasonal variation in the Luzon Strait deepwater overflow (LSDO) is providedThe contribution of density variation on the eastern side of Luzon Strait to seasonal variation of the pressure difference is revealedSeasonal variation of deep western boundary current in the Philippine Sea regulates the density variation, inducing the seasonal variation of LSDO
DOI	10.1029/2023GL105405
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[2020YFA0608801]; National Natural Science Foundation of China[2023M733531]; National Key Research and Development Program of China[NORC2019-09]; National Key Research and Development Program of China[42249909]; China Postdoctoral Science Foundation[41849909]; China Postdoctoral Science Foundation[LSKJ202201702]; NSFC Shiptime Sharing Projects[tsqn202103128]; NSFC Shiptime Sharing Projects[202306094]; Project of Science and Technology Innovation of Laoshan Laboratory; Youth Innovation Promotion Association (CAS); [XDB42010105]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001067074300001
出版者	AMER GEOPHYSICAL UNION
WOS关键词	CIRCULATION ; VARIABILITY
引用统计	被引频次：2[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/337002/181781
专题	海洋环流与波动重点实验室
通讯作者	Zhang, Linlin; Zhou, Chun
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Lao Shan Lab, Qingdao, Peoples R China 3.Ocean Univ China, Sanya Oceanog Inst, Frontier Sci Ctr Deep Ocean Multispheres & Earth S, Qingdao Sanya, Peoples R China 4.Ocean Univ China, Sanya Oceanog Inst, Phys Oceanog Lab, Key Lab Ocean Observat & Informat Hainan Prov, Qingdao Sanya, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Xu, Qinbo,Zhang, Linlin,Xiao, Xin,et al. Seasonal Link Between Deepwater Overflow Through the Luzon Strait and Deep Western Boundary Current in the Philippine Sea[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50(18):9.
APA	Xu, Qinbo,Zhang, Linlin,Xiao, Xin,Zhou, Chun,Wang, Fan,&Hu, Dunxin.(2023).Seasonal Link Between Deepwater Overflow Through the Luzon Strait and Deep Western Boundary Current in the Philippine Sea.GEOPHYSICAL RESEARCH LETTERS,50(18),9.
MLA	Xu, Qinbo,et al."Seasonal Link Between Deepwater Overflow Through the Luzon Strait and Deep Western Boundary Current in the Philippine Sea".GEOPHYSICAL RESEARCH LETTERS 50.18(2023):9.