A Laboratory Study of the Zonal Structure of Western Boundary Currents
A Laboratory Study of the Zonal Structure of Western Boundary Currents
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西部边界流纬向结构的室内研究
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. M. Løvås
中科院分区：
文献类型：
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作者：
S. Pierini;V. Malvestuto;G. Siena;T. McClimans;S. M. Løvås
通过分析经向速度场的“纬向”廓线随输送强度和其它动力学参数的变化，实验研究了5m转盆中沿“经向”直海岸的强非线性惯性西边界流的纬向结构。在没有任何表面应力的情况下，由海洋内部的表面风应力旋度产生的回流在旋转的盆地中被活塞运动所强迫。实验室装置由两个平行的矩形通道组成，两个通道由两个弧形连接连接：在第一个通道中，活塞在2.5m的距离内以0.5m至3 cm的恒定速度加速S−1，在第二个通道的入口处产生几乎未剪切的电流。在后者中，水深的线性减小提供了地形贝塔效应，这是向西加强发展所必需的。近乎稳定的洋流。
Abstract The zonal structure of strongly nonlinear inertial western boundary currents (WBCs) is studied experimentally along a straight “meridional” coast in a 5-m-diameter rotating basin by analyzing the “zonal” profile of the meridional velocity field as a function of transport intensity and other dynamical parameters. The return flow that is generated by the surface wind stress curl in the oceanic interior is forced in the rotating basin by the motion of a piston, in the absence of any surface stress. The laboratory setup consists of two parallel rectangular channels separated by an island and linked by two curved connections: in the first channel, a piston is forced at a constant speed up ranging from 0.5 to 3 cm s−1 over a distance of 2.5 m, producing a virtually unsheared current at the entrance of the second channel. In the latter, a linear reduction of the water depth provides the topographic beta effect that is necessary for the development of the westward intensification. Nearly steady currents ...