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A southwestward flow has been observed at the eastern side of the Tsushima Islands by ADCP observations. The generation mechanism of the flow which is considered as a countercurrent of the Tsushima Wa...rm Current is investigated using shallow water equation models. Simulations by a baroclinic and a barotropic model explain that two major conditions are important for the generation of the countercurrent: One is the presence of the earth’s rotation and the other is the seasonal change in baroclinic structure at the Tsushima Straits. The southwestward flow is interpreted as a boundary flow between clockwise and anticlockwise eddies at the lee-side of the Tsushima Straits. The lee-side eddies are not stationary but are advected toward the downstream of the Tsushima Warm Current.show more
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