2012 Fiscal Year Final Research Report
Study on deep circulation of the Japan Sea by direct measurement of deep water turbulence and chemical tracer
| Project/Area Number |
22340139
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HIBIYA Toshiyuki 東京大学大学院, 理学系研究科, 教授 (80192714)
CHO Kei 富山大学大学院, 理工学研究部(理学), 教授 (20301822)
SENJYU Tomoharu 九州大学, 応用力学研究所, 准教授 (60335982)
ENDOH Takahiro 九州大学, 応用力学研究所, 学術研究員 (10422362)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 日本海底層水 / 乱流エネルギー散逸率 / 深海乱流計 / 沈み込む水 / 地殻熱流量 / 日本海固有水 / 溶存酸素 / 鉛直1次元モデル |
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| Research Abstract |
Direct measurement of turbulence intensity to the bottom waterin the Japan Sea was carried out for the first time using Deep Water Microstructure Profiler (VMP5500), resulting in small values of turbulent energy dissipation rate about 3~5x10-11(W kg-1). This suggests that there is no intensified turbulence in thebottom layer. Using 1-dimensional model, the characteristics of the Japan Sea Bottom Water could be reproduced by terrestrial heat and intermittent supply of cold water originated by deep sinking.
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