2024-03-29T13:23:14Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/360852022-11-17T02:08:08Zhdl_2115_36083hdl_2115_21524hdl_2115_1412006年5月末の北海道亀田半島沖で発生した急潮現象The Kyucho occurred off Kameda Peninsula, Hokkaido, at the end of May, 2006小林, 直人磯田, 豊小林, 雅行佐藤, 千鶴木村, 修山口, 秀一高津, 哲也ロザ, アナ ルイザKyuchoKameda peninsulahaloclinerainfall waterwind-induced internal Kelvin wave660A large damage to fishing set-nets caused by the Kyucho occurred off Kameda peninsula on 30 May, 2006. Such Kyucho seldom occurs in this area and hence it is unusual phenomenon. Two current-meters setting off Usujiri located at Kameda peninsula and off Shiraoi faced the Hidaka Bay captured this sudden and swift current. The meteorological and oceanographical conditions in 2005 without the Kyucho and those in 2006 with the Kyucho were compared. The difference in both years was the oceanic stratification. That is, the surface halocline was thinly formed by a large quantity of rainfall water accompanied by the atmospheric disturbance on 28 May in 2006, before the Kyucho occurrence. In the case of such discontinuity subsurface thinner layer than usual, we will expect that the particle velocity of wind-induced internal Kelvin wave increases, but its phase propagation speed rather decreases. In fact, the observed surface current velocity (0.3-1.2 m/s) is almost as same as the estimated propagation speed (0.3-0.8 m/s).北海道大学大学院水産科学研究院Departmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/36085https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/36085/1/58-3_p29-41.pdf1346-1842北海道大学水産科学研究彙報58329412009-02-28jpnpublisher