1993 Fiscal Year Final Research Report Summary
Study for the Mechanism of the Separation of the Western Boundary Current
| Project/Area Number |
04640418
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
気象・海洋・陸水学
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| Research Institution | Research Institute for Applied Mechanics, Kyushu University |
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Principal Investigator |
YOON Jong-Hwan Kyushu University, Research Institute for Applied Mechanics, associate professor, 応用力学研究所, 助教授 (80111459)
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| Co-Investigator(Kenkyū-buntansha) |
KUBOKAWA Atsushi Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, as, 総合理工学研究科, 助教授 (00178039)
TAKEMATSU Masaki Kyushu University, Research Institute for Applied Mechanics, professor, 応用力学研究所, 教授 (50038535)
TAKEMATSU Masaki Kyushu University, Research Institute for Applied Mechanics, professor (50038535)
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| Project Period (FY) |
1992 – 1993
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| Keywords | western boundary current / latitude of separation / diagnostic model / mini ocean / East Korean Warm Current |
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| Research Abstract |
To study the mechanism of the separation of the western boundary current (WBC), we carried out numerical experiments about an ideal ocean by a reduced gravity model and about the Japan Sea "the mini ocean" by a reduced gravity model, a multi - level model and a diagnostic model. We also carried out geostrophic calculation with the data provided by NODC and Russia.
The latitude of separation is determined by the balance between the strength of the northward WBC(the East Korean Warm Current) and the cyclonic gyre north of the Polar front(the subarctic gyre). The cyclonic gyre north of the Polar front is formed by the wind with positive curl and the cooling in winter. However, we cannot show which is more important, wind or cooling, guantitatively at this stage.
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