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研究黑潮大曲流的长期变化

• 批准号: 21740346
• 负责人: USUI Norihisa
• 金额: $ 2.83万
• 依托单位: Japan, Meteorological Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740346/
• 关键词: 黒潮大蛇行; データ同化; 大蛇行インデックス; 長期変動; 流量; 伊豆海嶺; 黒潮続流; 台湾沖; 黒潮; 大蛇行; 海洋データ同化; 感度実験; 海洋大循環モデル; 沿岸補足波

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.

利用海洋资料同化系统进行了敏感性分析和海洋再分析实验，以阐明黑潮大弯曲的长期变化。敏感性分析表明，黑潮输送量越低，大弯曲的持续时间越长，表明黑潮大弯曲的持续时间对黑潮输送量有很强的依赖性。黑潮大弯曲的测井历史可以通过黑潮输送、黑潮伸展状态和台湾以东中尺度涡旋活动来解释。