Transitions in surface thermal signatures during the evolution of long-lived eddies in the global ocean

doi:10.1016/j.dsr.2024.104279

IOCAS-IR > 海洋环流与波动重点实验室

	Transitions in surface thermal signatures during the evolution of long-lived eddies in the global ocean
	Liu, Yingjie 1; Li, Xiaofeng 1; Liu, Chuanyu 1,2; Liu, Qian1,2
	2024-04-01
发表期刊	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN	0967-0637
卷号	206 页码:14
通讯作者	Li, Xiaofeng([email protected])
摘要	Mesoscale eddies are quasi-circular ocean currents accompanied by dynamic and thermodynamic variations, and are classified as anticyclonic (AEs) and cyclonic eddies (CEs) according to their rotation direction. Eddies transition between surface cold CEs/surface warm AEs ("conventional" eddies) and surface warm CEs/surface cold AEs ("unconventional" eddies) during their lifetimes. However, the characteristics and mechanisms of these transitions remain unclear. In this study, satellite and in-situ data were used to explore the spatiotemporal variation and vertical structures of "conventional" and "unconventional" eddies during the evolution of long-lived eddies (>1 year) in the global ocean from 1993 to 2015. On average, long-lived eddies are "unconven-tional" for about 40% of their lifetimes, and these "unconventional" eddies are concentrated in the South Atlantic Ocean and off the western and southern coasts of Australia. "Unconventional" eddies show distinct temporal variation and subsurface temperature structures. Generally, cold AEs and warm CEs last <3 months and are more active in summer than in winter. They have cold or warm cores within the mixed layer depth of the water column, which is affected by eddy-wind interactions via eddy-induced Ekman pumping. However, some cold AEs in the South Atlantic and warm CEs in the South Indian Ocean can last for >3 months and display weak seasonal variation. In addition, their cold and warm cores can extend to similar to 200 and similar to 300 m, respectively, and are related to subduction and the Leeuwin Current System
关键词	Long-lived eddy Thermal signature transition Vertical structure Eddy-induced ekman pumping Mixed layer Subduction
DOI	10.1016/j.dsr.2024.104279
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[U2006211]; National Natural Science Foundation of China[42306194]; National Natural Science Foundation of China[LSKJ202204302]; Natural Science Foundation of Shandong Prov- ince[ZR2020MD083]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001205092100001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	MESOSCALE EDDIES ; ANTICYCLONIC EDDIES ; MIXED-LAYER ; AGULHAS RINGS ; HEAT FLUXES ; SOUTH ; ALGORITHM ; INTERPOLATION ; TRANSLATION ; SATELLITE
引用统计	被引频次：1[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/337002/185602
专题	海洋环流与波动重点实验室
通讯作者	Li, Xiaofeng
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Univ Chinese Acad Sci UCAS, Coll Earth & Planetary Sci, Beijing, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Liu, Yingjie,Li, Xiaofeng,Liu, Chuanyu,et al. Transitions in surface thermal signatures during the evolution of long-lived eddies in the global ocean[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2024,206:14.
APA	Liu, Yingjie,Li, Xiaofeng,Liu, Chuanyu,&Liu, Qian.(2024).Transitions in surface thermal signatures during the evolution of long-lived eddies in the global ocean.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,206,14.
MLA	Liu, Yingjie,et al."Transitions in surface thermal signatures during the evolution of long-lived eddies in the global ocean".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 206(2024):14.