Interannual Modulation of Subthermocline Eddy Kinetic Energy East of the Philippines

doi:10.1029/2022JC018452

IOCAS-IR > 海洋环流与波动重点实验室

	Interannual Modulation of Subthermocline Eddy Kinetic Energy East of the Philippines
	Hui, Yuchao 1,2; Zhang, Linlin 1,3,4; Wang, Zhenxiao1,2 ; Wang, Fan1,3,4 ; Hu, Dunxin 1,3,4
	2022-05-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	127 期号:5 页码:15
通讯作者	Zhang, Linlin(zhanglinlin@qdio.ac.cn)
摘要	Interannual variation of subthermocline eddy kinetic energy (EKE) east of the Philippines is investigated based on mooring measurements during 2015-2019 and ocean-state estimates during 1995-2017 from the Oceanic General Circulation Model for the Earth Simulator (OFES). Prominent interannual variation of EKE is detected below the thermocline east of the Philippine coast, which is closely related to the El Nino and Southern Oscillation (ENSO) events and generally lags the Nino3.4 index by 14 months. Further energy diagnostic analysis indicates that the interannual variation of subthermocline EKE is controlled by both baroclinic and barotropic instability of the background flows and dominated by the barotropic instability especially. Barotropic instability in the southern part of the Philippine coast is associated with the subsurface component of the quasi-permanent anticyclonic Halmahera Eddy (HE), while that in the northern part is closely related to the Mindanao Undercurrent (MUC). Both HE and MUC are modulated by the ENSO events. When El Nino occurs, negative sea surface height anomalies appear near the dateline and propagate westward in the form of the first-mode baroclinic Rossby wave, exerting delayed impacts upon the western boundary currents east of the Philippine coast and further modulating the interannual variation of subthermocline EKE. Moreover, the barotropic energy conversion rate and its corresponding subthermocline EKE at lower latitudes respond relatively faster to ENSO due to the higher Rossby wave group velocity there.
关键词	subthermocline EKE interannual variation western tropical Pacific baroclinic barotropic instability
DOI	10.1029/2022JC018452
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42122041] ; National Natural Science Foundation of China[41776021] ; Chinese Academy of Sciences[XDB42010105] ; National Key Research and Development Program of China[2020YFA0608801] ; National Key Research and Development Program of China[2017YFA0603202] ; Youth Innovation Promotion Association (CAS) ; TS Scholar Program ; NSFC[41849909] ; NSFC[42049909] ; Major Project of Science and Technology Innovation of Shan Dong[2018SDKJ0105]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000798247600001
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：3[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/337002/179258
专题	海洋环流与波动重点实验室
通讯作者	Zhang, Linlin
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, 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	Hui, Yuchao,Zhang, Linlin,Wang, Zhenxiao,et al. Interannual Modulation of Subthermocline Eddy Kinetic Energy East of the Philippines[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(5):15.
APA	Hui, Yuchao,Zhang, Linlin,Wang, Zhenxiao,Wang, Fan,&Hu, Dunxin.(2022).Interannual Modulation of Subthermocline Eddy Kinetic Energy East of the Philippines.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(5),15.
MLA	Hui, Yuchao,et al."Interannual Modulation of Subthermocline Eddy Kinetic Energy East of the Philippines".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.5(2022):15.

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