混合層を考慮した内部慣性重力波の地形による変形に関する研究

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  • A Study on Transformation of Intemal Inertial Gravity Waves Considered a Mixing Layer
  • コンゴウソウ オ コウリョ シタ ナイブ カンセイ ジュウリョクハ ノ チケイ ニ ヨル ヘンケイ ニ カンスル ケンキュウ

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Intemal waves affect the physical environment in coast areas and a formation of mechanism of fishery ground. We theorized a transformation of the intemal inertial gravity waves by coastal topography and inspected using hydraulic experiments with rotary chamel. This theorized model used Holmboe's density model, which applied a mathematical model inserted a continuous layer in an interface of two layers, and added an effect of Coriolis force. The wave speed led by this model was arranged to simple practical forms and was agreed with the experiments. When the intemal waves progress in the shallow area, it was confirmed that the waves cause the shallow water transformation and are refracted due to the Snell's theorem. When a mass transport is generated by the shallow water transformation, it is recognized that the Coriolis force acts to the mass transport and makes the wave direction change. It is clearly that the wave height is estimated with the energy flux preservation law in a non-breaking zone. And the breaking condition of the wave was estimated theoretically. The characteristics of the intemal inertial gravity wave in coastal areas were determined using these theories.

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