Multicore structures and the splitting and merging of eddies in global oceans from satellite altimeter data

doi:10.5194/os-15-413-2019

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋物理与遥感研究室

	Multicore structures and the splitting and merging of eddies in global oceans from satellite altimeter data
	Cui, Wei 1,2; Wang, Wei 2; Zhang, Jie 1; Yang, Jungang 1
刊名	OCEAN SCIENCE
	2019-04-15
卷号	15 期号:2 页码:413-430
ISSN号	1812-0784
DOI	10.5194/os-15-413-2019
英文摘要	This study investigated the statistics of eddy splitting and merging in the global oceans based on 23 years of altimetry data. Multicore structures were identified using an improved geometric closed-contour algorithm of sea surface height. Splitting and merging events were discerned from continuous time series maps of sea level anomalies. Multicore structures represent an intermediate stage in the process of eddy evolution, similar to the generation of multiple nuclei in a cell as a preparatory phase for cell division. Generally, splitting or merging events can substantially change (by a factor of 2 or more) the eddy scale, amplitude, and eddy kinetic energy. Specifically, merging (splitting) generally causes an increase (decrease) of eddy properties. Multicore eddies were found to tend to split into two eddies with different intensities. Similarly, eddy merging is not an interaction of two equal-intensity eddies, and it tends to manifest as a strong eddy merging with a weaker one. A hybrid tracking strategy based on the eddy overlap ratio, considering both multicore and single-core eddies, was used to confirm splitting and merging events globally. The census revealed that eddy splitting and merging do not always occur most frequently in eddy-rich regions; e. g., their frequencies of occurrence in the Antarctic Circumpolar Current and western boundary currents were found to be greater than in midlatitude regions (20-35 ffi) to the north and south. Eddy splitting and merging are caused primarily by an unstable configuration of multicore structures due to obvious current-or eddytopography interaction, strong current variation, and eddymean flow interaction.
资助项目	National Key R&D Program of China[2016YFC1401800]
WOS研究方向	Meteorology & Atmospheric Sciences ; Oceanography
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000464568400001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/18369]
专题	业务部门_海洋物理与遥感研究室
通讯作者	Cui, Wei
作者单位	1.Minist Nat Resources China, Inst Oceanog 1, Qingdao, Shandong, Peoples R China 2.Ocean Univ China, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Phys Oceanog Lab, Qingdao, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Cui, Wei,Wang, Wei,Zhang, Jie,et al. Multicore structures and the splitting and merging of eddies in global oceans from satellite altimeter data[J]. OCEAN SCIENCE,2019,15(2):413-430.
APA	Cui, Wei,Wang, Wei,Zhang, Jie,&Yang, Jungang.(2019).Multicore structures and the splitting and merging of eddies in global oceans from satellite altimeter data.OCEAN SCIENCE,15(2),413-430.
MLA	Cui, Wei,et al."Multicore structures and the splitting and merging of eddies in global oceans from satellite altimeter data".OCEAN SCIENCE 15.2(2019):413-430.