Characteristics and dynamics of the interannual eddy kinetic energy variation in the Western Equatorial Pacific Ocean

doi:10.1016/j.pocean.2024.103358

IOCAS-IR > 海洋环流与波动重点实验室

	Characteristics and dynamics of the interannual eddy kinetic energy variation in the Western Equatorial Pacific Ocean
	Liu, Xueqi1 ; Zhou, Hui 1,2,3; Liu, Hengchang 4,5; Yang, Wenlong 1
	2024-12-01
发表期刊	PROGRESS IN OCEANOGRAPHY
ISSN	0079-6611
卷号	229 页码:14
通讯作者	Zhou, Hui([email protected])
摘要	The interannual variations of eddy kinetic energy (EKE) in the western equatorial Pacific Ocean are investigated based on satellite observations and model outputs in this study. Results reveal that the EKE exhibits vigorous interannual variations, especially in the region of North Equatorial Countercurrent (NECC) and north of New Guinea, and the variations differ between the two types of El Nino events. The energy budget diagnosis indicates that the EKE variations are mainly attributed to the barotropic instability associated with the background currents. Specifically, the energetic NECC behaves northward shift and a stronger meander path, which favors the enhancement of EKE variations due to the enhanced barotropic instability. The interannual fluctuations of the strength of the New Guinea Coastal Current/Undercurrent (NGCC/NGCUC) and the eastward current along the equator contribute to the significant EKE interannual variations north of New Guinea. Further, the distinct features of EKE variations in two types of El Nino events are as follows: EKE typically weakens in the western equatorial Pacific during Eastern Pacific El Nino (EP-El Nino) events, whereas it intensifies north of New Guinea during Central Pacific El Nino (CP-El Nino) events. The opposite features north of New Guinea are attributed to the wind work and a stronger eastward current along the equator in CP-El Nino events. These results can contribute to a better understanding of the low-frequency eddy-mean flow interactions.
关键词	Eddy kinetic energy Western equatorial Pacific Ocean Interannual variations Barotropic and baroclinic instability Eddy-mean flow interaction EP-El Nino CP-El Nino
DOI	10.1016/j.pocean.2024.103358
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[42306002]; National Natural Science Foundation of China (NSFC)[42276012]; Science and Technology Innovation Project of Laoshan Laboratory[LSKJ202202502]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000]; Key Collaborative Research Program of the Alliance of International Science Organizations[ANSO-CR-KP-2022-08]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001330887000001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	TROPICAL PACIFIC ; BOUNDARY CURRENTS ; MESOSCALE EDDIES ; MINDANAO CURRENT ; EL-NINO ; VARIABILITY ; CIRCULATION ; KUROSHIO ; WATER ; COUNTERCURRENT
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/199310
专题	海洋环流与波动重点实验室
通讯作者	Zhou, Hui
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Ocean Circulat & Waves, Qingdao 266400, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Laoshan Lab, Qingdao, Peoples R China 4.Beijing Inst Appl Meteorol, Beijing 100029, Peoples R China 5.State Key Lab Geoinformat Engn, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xueqi,Zhou, Hui,Liu, Hengchang,et al. Characteristics and dynamics of the interannual eddy kinetic energy variation in the Western Equatorial Pacific Ocean[J]. PROGRESS IN OCEANOGRAPHY,2024,229:14.
APA	Liu, Xueqi,Zhou, Hui,Liu, Hengchang,&Yang, Wenlong.(2024).Characteristics and dynamics of the interannual eddy kinetic energy variation in the Western Equatorial Pacific Ocean.PROGRESS IN OCEANOGRAPHY,229,14.
MLA	Liu, Xueqi,et al."Characteristics and dynamics of the interannual eddy kinetic energy variation in the Western Equatorial Pacific Ocean".PROGRESS IN OCEANOGRAPHY 229(2024):14.