ABSTRACT

We investigate the classical problem of wind-stress-induced non-equatorial steady ocean currents, considering a three-valued piecewise-constant eddy viscosity. This extends and generalizes recent results on piecewise-uniform eddy viscosity with only two layers. The aim is to determine how variations in the relative values of the eddy viscosity at different depths may account for the deviations from the surface current deflection of 45${}^{\circ }$, predicted in the classical constant eddy viscosity case. Such variations are observed in field data, and we investigate analytically the effect the presence of a third region makes compared to the two-layer case.

中文翻译：

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用于分段恒定涡流粘度的 Ekman 螺旋

摘要

我们研究了风应力引起的非赤道稳定洋流的经典问题，考虑了三值分段恒定涡流粘度。这扩展并概括了最近关于只有两层的分段均匀涡流粘度的结果。目的是确定不同深度的涡流粘度相对值的变化如何解释与 45 的表面电流偏转的偏差${}^{\circ }$，在经典的恒定涡粘度情况下预测。在现场数据中观察到这种变化，我们分析研究了第三区域的存在与两层情况相比的影响。