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Kyucho around the east coast of Noto Peninsula in the Japan Sea consists of the first strong current after passing an atmospheric disturbance and following periodical currents. The first strong curren...t with highest flow speed has been discussed from two points of view: density currents and near-inertial internal waves. In this study, we discuss which phenomena and dominant in a Kyucho occurred in September 2006. The first strong current appeared in the period of rapid temperature increase, while the current speed was reduced when the temperature reached a maximum. Unlike this, for the following periodical currents, temperature and current speed varied in phase, showing a character of progressive waves. Besides, after the first strong current, the offshore water mass north of the peninsula was found in Toyama Bay suggesting a large scale water mass exchange. These facts indicate that the first strong current is a density current in a rotating system; propagation of the offshore warm water which had been piled up to the northern coast of the peninsula by southwesterly winds. On the other hand, following periodical currents are flows accompanied by propagation of coastal trapped waves generated by scattering of near-inertial internal waves at the northern part of the peninsula.続きを見る
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