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Turbulent bottom Ekman boundary layer measured over a continental shelf


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タイトル: Turbulent bottom Ekman boundary layer measured over a continental shelf
著者: Yoshikawa, Yutaka / Endoh, Takahiro / Matsuno, Takeshi / Wagawa, Taku / Tsutsumi, Eisuke / Yoshimura, Hiroshi / Morii, Yasuhiro
発行日: 2010年 8月12日
出版者: American Geophysical Union
引用: Geophysical Research Letters, 37(15), L15605; 2010
抄録: An acoustic Doppler current profiler was deployed in summer and autumn in 2007-2009 at two stations on the East China Sea shelf. Clear velocity spirals that basically correspond to theoretical Ekman spirals were identified for both mean and tidal currents. From these spirals and the corresponding Ekman equation, we estimated the time-averaged eddy viscosity () profiles. The estimate dμ was largest (2-3 × 10-3 m2 s -1) around 5 m from the bottom and decreased almost exponentially with height. A qualitatively similar profile of the eddy diffusivity was also inferred from the acoustic Doppler current profiler data and microstructure profiler data. The flux Richardson number was estimated as 0.11±0.10 ∼ 0.46 0.17, indicating relatively large buoyancy contribution to the turbulent kinetic energy budget.
記述: Yoshikawa, Y., Endoh, T., Matsuno, T., Wagawa, T., Tsutsumi, E., Yoshimura, H., Morii, Y. , (2010), Turbulent bottom Ekman boundary layer measured over a continental shelf , Geophysical Research Letters, 37(15), L15605, DOI:10.1029/2010GL044156. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
URI: http://hdl.handle.net/10069/24671
ISSN: 00948276
DOI: 10.1029/2010GL044156
権利: An edited version of this paper was published by AGU. Copyright 2010 American Geophysical Union
資料タイプ: Journal Article
原稿種類: author
出現コレクション:080 学術雑誌論文

引用URI : http://hdl.handle.net/10069/24671

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