| Project/Area Number |
26400472
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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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・地球化学研究部, 主任研究官 (50370333)
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| Co-Investigator(Renkei-kenkyūsha) |
HIROSE Nariaki 気象庁気象研究所, 海洋地球化学研究部, 研究官 (20748074)
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| Research Collaborator |
YASUDA Tamaki 気象庁, 地球環境海洋部・情報課, エルニーニョ情報管理官
FUKUDA Yoshikazu 気象庁, 地球環境海洋部, 海洋気象課調査官
MOTOYAMA Tatsuya 気象庁, 地球環境海洋部, 海洋気象情報室技術専門官
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 沿岸水位 / 沿岸捕捉波 / 異常潮位 / 黒潮続流 / 十年規模変動 / 貯熱量 / 対馬暖流 / データ同化 / 対馬海峡 / 海峡通過流量 / 中緯度偏西風 / 海洋再解析 / 黒潮 / 海洋モデル |
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| Outline of Final Research Achievements |
Four-dimensional variational ocean reanalysis for the western North Pacific (FORA-WNP30) was produced to study sea level variability along the Japanese coast on the timescales from 10 days to a decade. It is the first-ever dataset covering the western North Pacific over 3 decades at eddy-resolving resolution. FORA-WNP30 clarified a generation mechanism of an unusual tide that occurred in 2001. It was caused by a coastal-trapped waves (CTWs) induced as a result of a short-term fluctuation of the Kuroshio path. The CTWs play an important role not only in the unusual tide on 2011 but also in the long-term variability of the Japanese coastal sea level, which synchronizes with the decadal variability of the Kuroshio extension. It is also shown that the long-term coastal sea-level variability has a significant impact on long-term variability of ocean heat content in the Japan Sea by changing volume transport at the Tsushima Strait.
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