Estimating the Kuroshio Axis South of Japan Using Combination of Satellite Altimetry and Drifting Buoys |
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| Authors: | Daisuke Ambe Shiro Imawaki Hiroshi Uchida Kaoru Ichikawa |
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| Institution: | (1) Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga Fukuoka, 816-8150, Japan;(2) Research Institute for Applied Mechanics, Kyushu University, Kasuga Fukuoka, 816-8150, Japan;(3) Japan Marine Science and Technology Center, Natsushima, Yokosuka Kanagawa, 237-0061, Japan |
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| Abstract: | By tracking the locally strongest part of the sea-surface velocity field, which was obtained by integrating data of satellite
altimeters and surface drifting buoys, we extracted the Kuroshio axis south of Japan every 10 days from October 1992 to December
2000. The obtained axes clearly express the effect of the bottom topography; three modes were observed when the Kuroshio ran
over the Izu Ridge. The axis was very stable to the south of ‘Tosa-bae,’ off the Kii Channel. Mean current speed at the Kuroshio
axis gradually increased from 0.65 m/s south of Kyushu to 1.45 m/s off Enshu-nada.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Kuroshio axis satellite altimetry drifting buoy bottom topography velocity variation |
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