2007 Fiscal Year Final Research Report Summary
Fundamental study on accuracy improvement for prediction of Kyucho induced by a coastal-trapped wave
| Project/Area Number |
17540411
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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 |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
KITADE Yujiro Tokyo University of Marine Science and Technology, Faculty of Marine Science, Associate Professor (50281001)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUYAMA Masaji Tokyo University of Marine Science and Technology, Faculty of Marine Science, Professor (00092594)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Physical oceanography / Prediction of ocean condition / Disaster in coastal ocean / Coastal-trapped wave / Kyucho / Kuroshio / Ocean monitoring |
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| Research Abstract |
We developed real-time ocean monitoring system, which can obtain temperature stratification data in stormy weather condition, in order to predict Kyucho, stormy current near the coasts induced by a coastal-trapped wave. Furthermore, new ocean prediction model was developed by improving a three-dimensional level model.
1. Development of real-time ocean monitoring system
Real-time ocean monitoring system has been developed and moored off Odawara and off Tomiyama in Sagami Bay. The system can obtain temperature data from sea surface to 100m depth. All of the equipments, such as micro chip and memory for operating data sampling, were covered by FRP to gain waterproof of 50 dbar. After three time revisions, final version of monitoring system was developed. Although several typhoons have passed near the monitoring area during the period of examination, the monitoring system obtained real-lime temperature data continuously. The obtained data is updated on website every day and used for a prelim
… More
inary prediction of Kyucho.
2. Development of ocean prediction model
A three dimensional model called hybrid model was developed in our study. Barotropic and baroclinic components of current were calculated separately, and we succeeded to shorten calculation time considerably. The model was tested by applying for a Kyucho in Sagami Bay and Wakasa Bay to check its performance.
(1)Sagami Bay: Amplification mechanism of tidal current was clarified by the new model with high resolution in horizontal grid point. Strong current associated with internal tide was found to be caused by warm water intrusion.
(2)Wakasa Bay: Mechanism of Mae-Kyucho that is induced before Typhoon passage was also clarified by the model. As a trial on accuracy improvement for prediction of Kyucho, the model was improved to a nesting model, which can introduce a part of RIAMOM data set distributed by Research Institute for Applied Mechanics of Kyushu University. The nesting model showed good performance on the prediction of a Kyucho. Less
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Research Products
(16 results)
