Study on long-term variation of the Kuroshio large meander using an ocean data assimilation system

利用海洋资料同化系统进行了敏感性分析和海洋再分析试验，以弄清黑潮大弯曲的长期变率。敏感性分析表明，较低的黑潮输运导致大弯曲的持续时间较长，表明黑潮大弯曲的持续时间强烈依赖于黑潮输送。从黑潮输送、黑潮伸展状态和台湾以东中尺度涡旋活动三个方面解释了黑潮大弯曲的测井历史。

Sensitivity analyses and an ocean reanalysis experiment are conducted using an ocean data assimilation system to clarify the long-term variability of the Kuroshio large meander. The sensitivity analyses revel that the lower Kuroshio transport leads to the longer duration of the large meander, indicating that the duration of the Kuroshio large meander strongly depends on the Kuroshio transport. It is also shown that the log history of the Kuroshio large meander is explained by considering the Kuroshio transport, Kuroshio extension state, and mesoscale eddy activity east of Taiwan.