Mesoscale eddies in the northwestern subtropical Pacific Ocean: Statistical characteristics and three-dimensional structures

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Mesoscale eddies in the northwestern subtropical Pacific Ocean: Statistical characteristics and three-dimensional structures
	Yang, Guang 1,2; Wang, Fan1 ; Li, Yuanlong 1,3; Lin, Pengfei 4; Wang, F
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2013-04-01
卷号	118 期号:4 页码:1906-1925
关键词	northwestern subtropical Pacific mesoscale eddies satellite altimetry Argo profiles statistical characteristic three-dimensional structure
ISSN号	2169-9275
通讯作者	Wang, F
中文摘要	Mesoscale eddy properties in the northwestern subtropical Pacific Ocean are investigated by analyzing 22,567 cyclonic eddies (CEs) and 26,365 anticyclonic eddies (AEs) detected from 19 year altimetric sea level records. Eddy occurrence frequency and kinetic energy are prevailingly high in the Subtropical Countercurrent zonal band between 19 degrees N and 26 degrees N and further elevated near the Luzon-Taiwan coast. A general superiority of AEs is observed at most latitudes except between 19 degrees N and 22 degrees N, where the CE number is larger. The modal radius and mean lifespan of the CEs (AEs) are 134km and 11.2weeks (121km and 10.9weeks), respectively. After generation, most eddies propagate westward with a mean speed of 7.2cms-1 and deflect northward following the Kuroshio along the Luzon-Taiwan coast. Three-dimensional eddy structures are further explored with composite eddy images in five subregions constructed by surfacing Argo temperature/salinity data into altimeter-detected eddy areas. Due to the existence of mode waters in the main thermocline, eddy-induced temperature anomaly exhibits a double-core vertical structure which is especially evident in CE images. Because of the vertical water mass distribution, salinity anomaly features a sandwich-like pattern which is more evident in AE images. Also revealed is the significant structure difference in these five subregions. Eddies are greatly intensified as they approach the western boundary, inducing larger temperature and salinity anomalies and influencing deeper ocean. Along the Luzon-Taiwan coast, AEs are preferentially strengthened by the northward background flow.
英文摘要	Mesoscale eddy properties in the northwestern subtropical Pacific Ocean are investigated by analyzing 22,567 cyclonic eddies (CEs) and 26,365 anticyclonic eddies (AEs) detected from 19 year altimetric sea level records. Eddy occurrence frequency and kinetic energy are prevailingly high in the Subtropical Countercurrent zonal band between 19 degrees N and 26 degrees N and further elevated near the Luzon-Taiwan coast. A general superiority of AEs is observed at most latitudes except between 19 degrees N and 22 degrees N, where the CE number is larger. The modal radius and mean lifespan of the CEs (AEs) are 134km and 11.2weeks (121km and 10.9weeks), respectively. After generation, most eddies propagate westward with a mean speed of 7.2cms-1 and deflect northward following the Kuroshio along the Luzon-Taiwan coast. Three-dimensional eddy structures are further explored with composite eddy images in five subregions constructed by surfacing Argo temperature/salinity data into altimeter-detected eddy areas. Due to the existence of mode waters in the main thermocline, eddy-induced temperature anomaly exhibits a double-core vertical structure which is especially evident in CE images. Because of the vertical water mass distribution, salinity anomaly features a sandwich-like pattern which is more evident in AE images. Also revealed is the significant structure difference in these five subregions. Eddies are greatly intensified as they approach the western boundary, inducing larger temperature and salinity anomalies and influencing deeper ocean. Along the Luzon-Taiwan coast, AEs are preferentially strengthened by the northward background flow.
学科主题	Oceanography
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Oceanography
研究领域[WOS]	Oceanography
关键词[WOS]	HAWAIIAN LEE COUNTERCURRENT ; NORTH EQUATORIAL CURRENT ; THETA-S CLIMATOLOGY ; EAST CHINA SEA ; INTERANNUAL VARIABILITY ; PHILIPPINE SEA ; EDDY FIELD ; TROPICAL PACIFIC ; WESTERN BOUNDARY ; PROFILING FLOATS
收录类别	SCI
原文出处	10.1002/jgrc.20164
语种	英语
WOS记录号	WOS:000320324100019
公开日期	2014-07-17
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/16418]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Wang, F
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, Peoples R China 3.Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA 4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yang, Guang,Wang, Fan,Li, Yuanlong,et al. Mesoscale eddies in the northwestern subtropical Pacific Ocean: Statistical characteristics and three-dimensional structures[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2013,118(4):1906-1925.
APA	Yang, Guang,Wang, Fan,Li, Yuanlong,Lin, Pengfei,&Wang, F.(2013).Mesoscale eddies in the northwestern subtropical Pacific Ocean: Statistical characteristics and three-dimensional structures.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,118(4),1906-1925.
MLA	Yang, Guang,et al."Mesoscale eddies in the northwestern subtropical Pacific Ocean: Statistical characteristics and three-dimensional structures".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 118.4(2013):1906-1925.