Mean properties of mesoscale eddies in the Kuroshio recirculation region

doi:10.1007/s00343-014-3029-2

IOCAS-IR > 海洋环流与波动重点实验室

	Mean properties of mesoscale eddies in the Kuroshio recirculation region
	Ma Libin 1,2; Wang Qiang 1; Ma, LB (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China.
	2014-05-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷号	32 期号:3 页码:681-702
文章类型	Article
摘要	Using a 19-year altimetric dataset, the mean properties and spatiotemporal variations of eddies in the Kuroshio recirculation region are examined. A total of 2 001 cyclonic tracks and 1 847 anticyclonic tracks were identified using a geometry-based eddy detection method. The mean radius was 57 km for cyclonic eddies and was 61 km for anticyclonic eddies, respectively, and the mean lifetime was about 10 weeks for both type eddies. There were asymmetric spatial distributions for eddy generation and eddy termination, which were domain-dependent. Mean eddy generation rates were 2.0 per week for cyclonic eddies and were 1.9 per week for anticyclonic eddies. Both type eddies tended to deform during their lifetime and had different propagation characteristics, which mainly propagated westward and southwestward with velocities 4.0-9.9 cm/s, in the Kuroshio recirculation region. Further discussion illustrates that the eddy westward speed maybe influenced by the combined effect of vertical shear of horizontal currents and nonlinearity of eddy. To better understand the evolution of eddy tracks, a total of 134 long-lived tracks (lifetime a parts per thousand yen20 weeks) were examined. Comparison between short-span eddies (lifetime a parts per thousand yen4 weeks and < 20 weeks) and long-lived eddies is also conducted and the result shows that the short-span and long-lived eddies have similar time evolution. Finally, eddy seasonal variations and interannual changes are discussed. Correlation analysis shows that eddy activity is sensitive to the wind stress curl and meridional gradient of sea surface temperature on interannual timescales. Besides, the strength and orientation of background flows also have impacts on the eddy genesis.
关键词	Mesoscale Eddies Spatial Distributions Temporal Variations Potential Factors
学科领域	Marine & Freshwater Biology ; Oceanography
DOI	10.1007/s00343-014-3029-2
收录类别	SCI
语种	英语
WOS记录号	WOS:000335767800019
引用统计	被引频次：4[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/337002/23943
专题	海洋环流与波动重点实验室
通讯作者	Ma, LB (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ma Libin,Wang Qiang,Ma, LB . Mean properties of mesoscale eddies in the Kuroshio recirculation region[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2014,32(3):681-702.
APA	Ma Libin,Wang Qiang,&Ma, LB .(2014).Mean properties of mesoscale eddies in the Kuroshio recirculation region.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,32(3),681-702.
MLA	Ma Libin,et al."Mean properties of mesoscale eddies in the Kuroshio recirculation region".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 32.3(2014):681-702.

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