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タイトル: | 水温計格子を用いた浅水湖の成層破壊過程の観測 |
その他のタイトル: | MEASUREMENTS OF DESTRATIFICATION IN A SHALLOW LAKE USING THE THERMISTOR GRIDS |
著者: | 大久保, 賢治 |
著者名の別形: | OKUBO, Kenji |
発行日: | 1-Apr-1991 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. B |
巻: | 34 |
号: | B-2 |
開始ページ: | 319 |
終了ページ: | 336 |
抄録: | Temperature fluctuations due to interfacial waves were measured in a shllow lake using the thermistor grids. The waves as roughness on the deformable density interface were observed between the basic internal wave of the maximum buoyant frequency and the surface wind ripples.On the transition from smooth to rough interface, where frequency spectrum shows an inertial subrange, beyond which the viscous-convective subrange is seen as mixing goes on.The waves are generated from amplified internal wave, and wind waves copy themselves on the interface through the resonance with much slower interfacial ones.Diffusivity takes the peak at the bottom of thermocline, and for such a diffusivity profile, the log+linear law for temperature was deduced.Assuming the system is non-rotating, a profile model considering the wave steepness is shown, which estimates the flux as well as the diffusivity, and the former was compared well with the measured flux.Superimposing the first few modes of the cellular motion, the fluctuation of buoyancy in vertical was found similar with the measured one. |
URI: | http://hdl.handle.net/2433/72338 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html |
出現コレクション: | No.34 B-2 |
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