Forecasting of secondary tidal oscillation (Abiki) along the west coast of Kyushu and development of countermeasure of the disaster mitigation

在早春的时候，九州西海岸地区遭受了当地称为Abiki的地震灾害。本文通过现场观测和数值分析，探讨了大气二次振荡的形成机制。在Koshiki Is的Urauchi湾进行了两个季节性的野外观察，鹿儿岛县。利用一个先进的中尺度模式对东海上空的三维大气场进行了数值分析。分析了大气扰动下的海洋场，阐明了近海和沿海地区的共振机制。结合数值分析和现场观测结果，揭示了海气共振和几何共振条件下海气相互作用产生、发展和放大的一系列机理。

During early spring time, the west coast area of Kyushu has suffered from the seiche disasters locally called Abiki. This study investigates the mechanism of the meteorologically generated secondary oscillations by means of the field measurements and numerical analyses. Two series of seasonal field observations were conducted at Urauchi bay in Koshiki Is., Kagoshima Prefecture. Numerical analyses for the three dimensional atmospheric fields over the East China Sea were conducted using an advanced meso-scale model. The oceanic fields under the atmospheric disturbances were also analyzed to clarify the resonant mechanism in offshore as well as coastal areas. Close discussion correlating the findings of field measurements with those of the numerical analyses has revealed a series of the mechanism throughout generation, development and amplification under the air-sea and geometric resonance.