| Project/Area Number |
16K05549
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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 | Hokkaido University |
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Principal Investigator |
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| Research Collaborator |
OOKI Atsushi
SHIMODA Chikara
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 海洋物理 / 海洋科学 / 自然現象観測 / 乱流混合 / 内部波 / 流体 |
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| Outline of Final Research Achievements |
Three-dimensional fine structures with scales smaller than O (1 km) are closely related to mixing, which is a fundamental process in the oceans. However, such structures are not well understood due to the lack of observation methods. In this study, we have made successful observations of three-dimensional structures of transitional processes from a breaking of large-amplitude internal waves to turbulence, using the three-dimensional current and turbidity observation system we developed.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は、最も基本的な海洋現象の一つでありながら、長い間手つかずであった３次元微細構造の実態解明に向けた取組みである。微細構造は海洋中に遍く存在し、海洋運動の空間スケールの範囲のうち１／３強を占める。この海洋物理に残る広大なブラックボックスの実態解明は、それ自体、海洋物理学への大きな貢献と言えよう。微細構造の実態解明は、海水混合の理解と正確な評価・パラメタ化を介し、海洋の循環・物質循環・生態系そして長期変動の理解と将来予測の向上へ繋がる。
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