Variation of the North Equatorial Current, Mindanao Current, and Kuroshio Current in a High-Resolution Data Assimilation during 2008–2012

作     者：ZHAI Fangguo WANG Qingye WANG Fujun Hu Dunxin 

作者机构：Third Institute of Oceanography State Oceanic Administration Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2014年第31卷第6期

页      面：1445-1459页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：sponsored by the China Postdoctoral Science Foundation (Grant No.2013M530331) a project of the State Strategic Program of Global Change (Grant No.2013CB956202) 

主　　题：HYCOM assimilation North Equatorial Current Mindanao Current Kuroshio Current Mindanao Dome 

摘      要：Outputs from a high-resolution data assimilation system,the global Hybrid Coordinate Ocean Model and Navy Coupled Ocean Data Assimilation （HYCOM＋NCODA） 1/12° analysis,were analyzed for the period September 2008 to February *** objectives were to evaluate the performance of the system in simulating ocean circulation in the tropical northwestern Pacific and to examine the seasonal to interannual variations of the western boundary *** HYCOM assimilation compares well with altimetry observations and mooring current *** mean structures and standard deviations of velocities of the North Equatorial Current （NEC）,Mindanao Current （MC） and Kuroshio Current （KC） also compare well with previous *** to interannual variations of the NEC transport volume are closely correlated with the MC transport volume,instead of that of the *** NEC and MC transport volumes mainly show well-defined annual cycles,with their maxima in spring and minima in fall,and are closely related to the circulation changes in the Mindanao Dome （MD） *** seasons of transport maxima,the MD region experiences negative SSH anomalies and a cyclonic gyre anomaly,and in seasons of transport minima the situation is *** sea surface NEC bifurcation latitude （NBL） in the HYCOM assimilation also agrees well with altimetry *** 2009,the NBL shows an annual cycle similar to previous studies,reaching its southernmost position in summer and its northernmost position in *** 2010 and 2011,the NBL variations are dominantly influenced by La Ni（n）a *** dynamics responsible for the seasonal to interannual variations of the NEC-MC-KC current system are also discussed.