Numerical simulation of the Kuroshio intrusion into the South China Sea by a passive tracer

查看全文 作　　者：LIU [1,2]Tongya;XU [1]Jiexin;HE [1]Yinghui;[3]LüHaibin;YAO [4]Yuan;CAI [1]Shuqun

机构地区：[1]State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China;[2]University of Chinese Academy of Sciences,Beijing 100049,China;[3]School of Geodesy and Geomatics Engineering,Huaihai Institute of Technology,Lianyungang 222005,China;[4]Qinhuangdao Marine Environmental Monitoring Central Station,North China Sea Branch of State Oceanic Administration,Qinhuangdao 066002,China

出　　处：《Acta Oceanologica Sinica》索引2016年第35卷第9期,共12页

基　　金：The Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences under contract Nos XDA11020305 and XDA13030103;the National Basic Research Program of China under contract No.2013CB956101;the National Science Foundation Council Grant of China under contract Nos 41206009,41430964 and 41521005;the Chinese Academy of Sciences/State Administration of Foreign Experts Affairs International Partnership Program for Creative Research Teams under contract No.20140491532 摘　　要：Owing to lack of observational data and accurate definition,it is difficult to distinguish the Kuroshio intrusion water from the Pacific Ocean into the South China Sea(SCS).By using a passive tracer to identify the Kuroshio water based on an observation-validated three-dimensional numerical model MITgcm,the spatio-temporal variation of the Kuroshio intrusion water into the SCS has been investigated.Our result shows the Kuroshio intrusion is of distinct seasonal variation in both horizontal and vertical directions.In winter,the intruding Kuroshio water reaches the farthest,almost occupying the area from 18°N to 23°N and 114°E to 121°E,with a small branch flowing towards the Taiwan Strait.The intrusion region of the Kuroshio water decreases with depth gradually.However,in summer,the Kuroshio water is confined to the east of 118°E without any branch reaching the Taiwan Strait;meanwhile the intrusion region of the Kuroshio water increases from the surface to the depth about 205 m,then it decreases with depth.The estimated annual mean of Kuroshio Intrusion Transport(KIT) via the Luzon Strait is westward to the SCS in an amount of –3.86×106 m3/s,which is larger than the annual mean of Luzon Strait Transport(LST) of –3.15×106 m3/s.The KIT above 250 m accounts for 60%–80% of the LST throughout the entire water column.By analyzing interannual variation of the Kuroshio intrusion from the year 2003 to 2012,we find that the Kuroshio branch flowing into the Taiwan Strait is the weaker in winter of La Ni?a years than those in El Ni?o and normal years,which may be attributed to the wind stress curl off the southeast China then.Furthermore,the KIT correlates the Ni?o 3.4 index from 2003 to 2012 with a correlation coefficient of 0.41,which is lower than that of the LST with the Ni?o 3.4 index,i.e.,0.78. 关键词：黑潮入侵示踪剂南海数值模拟三维数值模式台湾海峡黑潮水吕宋海峡

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Numerical simulation of the Kuroshio intrusion into the South China Sea by a passive tracer

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