Observation of the bottom boundary layer on the continental shelf |
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| Authors: | Kisaburo Nakata |
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| Institution: | (1) National Research Institute for Pollution and Resources, Yatabechô, Tsukuba, 305 Ibaraki Prefecture, Japan;(2) Agency of Industrial Science and Technology, Yatabechô, Tsukuba, 305 Ibaraki Prefecture, Japan;(3) Ministry of International Trade and Industry, Yatabechô, Tsukuba, 305 Ibaraki Prefecture, Japan |
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| Abstract: | Current meter data from various depths near the sea bottom collected for 31 days at time intervals of 10 minutes using a subsurface buoy system at a depth at 38 m on the continental shelf off Akita, Japan have been analyzed. The results show the existence of a stationary Ekman layer. The typical range of the characteristic parameters are estimated as follows; friction velocity: 0.38 cm s–1; Ekman layer thickness: 16 m; logarithmic layer thickness: 4 m–6 m; constant flux layer thickness: 0.4–0.6 m; Ekman veering: 28.7°; drag coefficient: 0.24×10–2–0.53×10–2. Veering was also observed in the logarithmic layer. |
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