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Energy transfers and multiscale interactions between intra-seasonal and low-frequency variability in western boundary currents of the tropical Pacific

文献类型：期刊论文

作者Guo, Xinying3,4; Hu, Shijian2,3,4,5; Yang, Yang1,6
刊名OCEAN DYNAMICS
出版日期2026-02-18
卷号76期号:3页码:16
关键词Intra-seasonal variability Multiscale interactions Western boundary currents Energy transfer
ISSN号1616-7341
DOI10.1007/s10236-026-01777-9
通讯作者Hu, Shijian(sjhu@hhu.edu.cn)
英文摘要Observations indicate that the western boundary current region in the tropical Pacific Ocean exhibits significant multiscale variability, particularly on intra-seasonal time scale. However, the cross-scale interactions between intra-seasonal and low-frequency scales remain unclear. Here we investigate this issue from the perspective of energy transfer using a combination of the multiscale window transform, canonical transfer, and localized multiscale energy analysis framework. The spatiotemporal characteristics of energy transfer between intra-seasonal variability (ISV) and seasonal-biennial variability/background flow are examined. We find that the cross-scale kinetic energy transfer plays a crucial role in the ISV energy input, with substantial differences between the upper and sub-thermocline layers in terms of the contributions from different scales. In the upper layer, intense cross-scale cascades associated with background flow occur in the origin of Kuroshio Current and south of Mindanao Current, while those in the New Guinea Coastal Current are linked to seasonal-biennial scale. In the sub-thermocline layer, forward cascades of kinetic energy from two low-frequency scales contribute over 90% of eddy kinetic energy input in the origin of Kuroshio Current and New Guinea Coastal Current. Nonlocal processes play a major role in sustaining the ISV energy in the North Equatorial Countercurrent region. In the north of Mindanao Current region where sub-thermocline eddies are active, the intra-seasonal available potential energy serves as the important source of subsurface ISV kinetic energy.
WOS关键词INTRASEASONAL KELVIN WAVES ; NORTH EQUATORIAL CURRENT ; INTERANNUAL VARIABILITY ; VORTICITY ANALYSIS ; OCEAN CIRCULATION ; MESOSCALE EDDIES ; ZONAL CURRENTS ; EDDY ENERGY ; UNDERCURRENT ; MINDANAO
资助项目Hohai University ; Laoshan Laboratory[LSKJ202202702] ; National Natural Science Foundation of China[42476016]
WOS研究方向Oceanography
语种英语
WOS记录号WOS:001695277100002
出版者SPRINGER HEIDELBERG
源URL[http://ir.qdio.ac.cn/handle/337002/204760]  
专题海洋研究所_海洋环流与波动重点实验室
通讯作者Hu, Shijian
作者单位1.Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen, Peoples R China
2.Hohai Univ, Key Lab Marine Hazards Forecasting, Minist Nat Resources, Nanjing, Peoples R China
3.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
5.Hohai Univ, Coll Oceanog, Nanjing, Peoples R China
6.Xiamen Univ, Coll Ocean & Earth Sci, Dept Phys Oceanog, Xiamen, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Xinying,Hu, Shijian,Yang, Yang. Energy transfers and multiscale interactions between intra-seasonal and low-frequency variability in western boundary currents of the tropical Pacific[J]. OCEAN DYNAMICS,2026,76(3):16.
APA Guo, Xinying,Hu, Shijian,&Yang, Yang.(2026).Energy transfers and multiscale interactions between intra-seasonal and low-frequency variability in western boundary currents of the tropical Pacific.OCEAN DYNAMICS,76(3),16.
MLA Guo, Xinying,et al."Energy transfers and multiscale interactions between intra-seasonal and low-frequency variability in western boundary currents of the tropical Pacific".OCEAN DYNAMICS 76.3(2026):16.

入库方式： OAI收割

来源：海洋研究所

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