Episodic outflow of suspended sediments from the Kii Channel to the Pacific Ocean in winter |
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| Authors: | Tetsuo Yanagi Takahide Hagita Toshiro Saino |
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| Institution: | (1) Department of Civil and Ocean Engineering, Ehime University, 790 Matsuyama, Japan;(2) Ocean Research Institute, University of Tokyo, Minami-Dai, Nakano-ku, 164 Tokyo, Japan |
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| Abstract: | Episodic outflow of suspended sediments from the Kii Channel to the Pacific Ocean in winter was observed by the sediment traps experiment above the shelf slope. When the current speed was weak and its direction was south or southwestward above the shelf slope the sinking sediment flux was nearly zero but the sinking sediment flux increased to 22g m–2 day–1 after the current speed was strong, its direction changed to south-west or westward and water temperature fell. Such intermitten sinking sediment flux above the shelf slope is considered to be related to the intermittent intrusion of the turbid and cold shelf water into the sub-surface layer of the transparent and warm slope water. Such episodic events may play a very important role in the material transport from the coastal sea to the open ocean. |
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