Driving mechanism of the Deep Antarctic Circumpolar Current by the meso-scale eddies..

中尺度涡驱动南极深部绕极流的机制

• 批准号: 14540407
• 负责人: SAKAI Satoshi
• 金额: $ 2.18万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540407/
• 关键词: Rotating tank; Meso-scale Eddies; Antarctic Circumpolar Current; Deep water circulation; 回転水槽実験

It is known that the Antarctic Circumpolar Current is flowing the surroundings of Antarctica for the east to the depths considerably. Although this origin is vaguely considered to be what is depended on the wind which generally blows a sea top in many cases, it is hard to consider the mechanism which stress of a wind cannot affect the direct depths, and runs through density stratification through Ekman convergence and emission, and does that influence to the depths dynamically. Then, it is the purpose of this research to confirm whether an indoor experiment is conducted using a rotation tank, a turbulent flow isotropic as initial turbulence is given, and, finally the flow facing the east is formed in the surroundings of a pole of nonlinear acceleration of turbulence.The experiment tank was making it rotate per minute 100 times with a cylinder form, changed depth of water in the shape of a concentric circle, and produced beta effect. Initial turbulence generating equipment repeated tria … More l and error many times, finally, is drawing out the stick inserted underwater in early stages, and carried out it to generating initial turbulence. Although this method considered another method at the beginning in order that the bunch of the drawn-out stick might interrupt the field of view of a camera, this method is turbulence's being generated most certainly and dividing the drawn-out stick by centrifugal force into two, and it is having developed the method of securing the field of view of a camera, and was made to adopt this method. Visualization of a flow hit the light of the shape of a sheet which put in order and made the light emitting diode to the styrene bead distributed underwater, and succeeded in visualizing the flow in the tank central part without the influence of the wind on surface tension or the water surface.Although the initial turbulence of two or more sizes was given and being repeatedly experimented in the experiment, the quite strong flow facing the east was obtained altogether. Although it had resulted in becoming for the east when the probability which serves as west Nagare in the centering on pole concentric circle [this/in numerical computation]-like sea in comparison with the numerical computation of Yamada and others was high and the pole was shifted, in an experiment, it always becomes a flow facing the east. By numerical computation, boundary conditions are slip conditions and this is considered to be because for quantity of motion not to be given on the boundary in the concentric circle-like sea. Less

It is known that the Antarctic Circumpolar Current is flowing the surroundings of Antarctica for the east to the depths consider.尽管该起源被认为是取决于风通常会吹出海面的风能，但很难考虑风的压力不会影响直接深度，并且通过Ekman的收敛和排放，并且会影响深度。然后，这项研究的目的是确认是否使用旋转箱进行室内实验，湍流的各向同性作为给出的初始湍流，最后，在非线性加速的周围形成了东方的流动。湍流的非线性加速周围环境。实验储罐每分钟旋转100次旋转旋转的旋转量，旋转均匀的效果，旋转且旋转的效果，并旋转一定的效果，又旋转了一定的效果，并旋转了一定的效果。最初的湍流生成设备重复三角体…更多的L和错误多次，在早期阶段插入了水下的棍子，并进行了它以产生初始的湍流。尽管该方法在开始时考虑了另一种方法，以便将一堆抽签棒可能打断相机的视野，但这种方法是最肯定地生成的湍流，并将其用离心力将绘制棒划分为两个，并且它已经开发出一种方法来确保相机的视野，并采用这种方法来采用这种方法。流动的可视化击中了按顺序放置的床单的光，并使苯乙烯珠的发光二极管分布在水下水下，并成功地可视化了储罐中心的流动，而没有风的影响对表面张力或水表面的影响。尽管给出了两种或更多尺寸的最初湍流，并反复进行了经过实验。尽管它导致东方成为东部的概率，而与Yamada的数值计算相比，在极点浓缩圆（以数值计算中）为中心（在数值计算中/中），杆子很高，并且在实验中移动了极，它总是变成面对东部的流动。通过数值计算，边界条件是滑移条件，这被认为是因为对于不在同心圆形海中的边界上不给予的运动数量。较少的