Study on long-term variation of the Kuroshio large meander using an ocean data assimilation system
| Project/Area Number |
21740346
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Japan, Meteorological Research Institute |
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Principal Investigator |
USUI Norihisa 気象庁気象研究所, 海洋研究部, 研究官 (50370333)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 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 |
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| Research Abstract |
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.
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Report
(4 results)
Research Products
(33 results)
