A Double-Index Method to Classify Kuroshio Intrusion Paths in the Luzon Strait

查看全文 作　　者：Zhida [1]HUANG;Hailong [2]LIU;Jianyu [1]HU;Pengfei [2]LIN

机构地区：[1]State Key Laboratory of Marine Environmental Science,College of Ocean and Earth Sciences,Xiamen University;[2]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences

出　　处：《Advances in Atmospheric Sciences》索引2016年第33卷第6期,共15页

基　　金：supported by the National Basic Research Program of China(Grant Nos.2015CB954004 and2013CB956204);the National Natural Science Foundation of China(Grant Nos.41276006;U1405233 and 41023002) 摘　　要：A double index(DI), which is made up of two sub-indices, is proposed to describe the spatial patterns of the Kuroshio intrusion and mesoscale eddies west to the Luzon Strait, based on satellite altimeter data. The area-integrated negative and positive geostrophic vorticities are defined as the Kuroshio warm eddy index(KWI) and the Kuroshio cold eddy index(KCI),respectively. Three typical spatial patterns are identified by the DI: the Kuroshio warm eddy path(KWEP), the Kuroshio cold eddy path(KCEP), and the leaking path. The primary features of the DI and three patterns are further investigated and compared with previous indices. The effects of the integrated area and the algorithm of the integration are investigated in detail. In general, the DI can overcome the problem of previously used indices in which the positive and negative geostrophic vorticities cancel each other out. Thus, the proportions of missing and misjudged events are greatly reduced using the DI.The DI, as compared with previously used indices, can better distinguish the paths of the Kuroshio intrusion and can be used for further research. 关键词：黑潮入侵吕宋海峡路径指标法分类卫星测高数据空间模式中尺度涡

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A Double-Index Method to Classify Kuroshio Intrusion Paths in the Luzon Strait

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