The northward intruding eddy along the East coast of Korea |
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| Authors: | Yutaka Isoda Sei-ichi Saitoh |
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| Institution: | (1) Department of Civil and Ocean Engineering, Ehime University, 790 Matsuyama, Japan;(2) Research Institute, Japan Weather Association, Kaiji Center Bldg., 5, 4-chome, Kojimachi, Chiyoda-ku, 102 Tokyo, Japan;(3) Present address: Faculty of Fisheries, Hokkaido University, 3-1-1, Minato-cho, 041 Hakodate, Japan |
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| Abstract: | The current structures and their seasonal variations in the East Korean Warm Current (EKWC) region, which plays a significant role in the northward transport of warm and saline waters, were described by combining the sea surface temperature (SST) data of consecutive satellite inferred (IR) images and hydrographic data. The SST patterns in winter-spring clearly showed that the small meander of thermal front originating from the Tsushima/Korea Strait formed close to the Korean coast and grew an isolated warm eddy with horizontal dimension of order 100 km. Such warm eddy began to intrude slowly northward from spring to summer. At that time, interactions with neighboring synoptic warm eddy Ks] around the Ulleung Basin were found to have strongly influence the movement of the intruding eddy and its structural change. In autumn, after the northward movement stopped at the north of eddy Ks], the relative stable northward current along the Korean coast were formed. The evidence from observational results does not support a persistent branching of the EKWC from the Tsushima/Korea Strait, but a seasonal episodic supply of warm and saline waters due to the northward intruding eddy process described above. |
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