Mechanisms of horizontal circulation induced by breaking of internal Kelvin waves over a slope
| Project/Area Number |
19560524
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水工水理学
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
NAKAYAMA Keisuke Kitami Institute of Technology, 工学部, 教授 (60271649)
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| Co-Investigator(Kenkyū-buntansha) |
古川 恵太 国土技術政策総合研究所, 沿岸海洋研究部, 室長 (00356031)
新谷 哲也 首都大学東京, 都市環境学部, 助教 (80281244)
柿沼 太郎 鹿児島大学, 工学部, 准教授 (70371755)
山敷 庸亮 日本大学, 理工学部, 講師 (20335201)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 成層場 / 砕波 / コリオリ / 物質輸送 / 水平循環 / 内部ケルビン波 / 残差流 / 内部波 / コリオリカ / コリオリ力 |
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| Research Abstract |
In general, stratification appears in an enclosed bay, such as Tokyo Bay, due to fresh water input from rivers and solar radiation during summer. When external force is given in a stratified flow field, larger amplitude internal waves are induced compared to water surface waves. The internal waves are likely to be deformed and to become internal Kelvin waves due to the Coriolis effect, which break over a slope in a shallow water region. However, the influence of internal Kelvin waves has not been revealed in the previous studies. Therefore, this study aims to clarify the influence of internal Kelvin waves on a stratified flow field by using laboratory experiments and numerical analysis. As a result, flow toward the breaking zone is induced by the breaking of internal Kelvin waves, which does not occur without the Coriolis effect. The flow toward the breaking zone is also found to drive cyclonic horizontal circulation.
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Report
(4 results)
Research Products
(34 results)
