In the oceangraphic observation at the eastern channel during summer (Mizuno et al., 1986), when typhoons passed around the Korea(Tsushima) Strait, several oceangraphic feature were found: the direction of the current was opposed to the northeasterly ...
In the oceangraphic observation at the eastern channel during summer (Mizuno et al., 1986), when typhoons passed around the Korea(Tsushima) Strait, several oceangraphic feature were found: the direction of the current was opposed to the northeasterly wind: temperature rapidly increased having a time lag of the maximum temperature between the upper and lower layers, after then decreased with oscillation. The mechanism to generate these phenomena are examined using the Prince Ocean Model with including an idealized typhoon model. The model region covers the East China Sea, the Yellow Sea, and a portion of the East Sea (the Japan Sea). The model well reproduces the observed features, especially in temperature field, and clearly manifests how the observed feature above happened. From early time when the typhoon was located in low latitude, an alongshore northward current west of Kyushu (the West Kyushu Current) is generated by an alongshore wind in the typhoon, and flows into the eastern channel, as a coastal jet, without regard to the wind field within the channels during this period. The observed phenomena above are generated by this current. This paper indicates that when typhoons pass around the Korea Strait, oceangraphic condition in the strait should be greatly influenced with whether the West Kyushu Current develops or not.