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Lagrangian trajectories, residual currents and rectification process in the Northern Gulf of California

机译：加利福尼亚北部湾的拉格朗日轨迹，剩余电流和整流过程

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摘要

Considering a semi-implicit approximation of the Coriolis terms, a numerical solution of the vertically integrated equations of motion is proposed. To test the two-dimensional numerical model, several experiments for the calculation of Euler, Stokes and Lagrange residual currents in the Gulf of California were carried out. To estimate the Lagrangian residual current, trajectories of particles were also simulated. The applied tidal constituents were M-2, S-2, K-2, N-2, P-1 and O-1. At spring tides, strong tidal velocities occur in the northern half of the gulf. In this region of complex geometry, depths change from a few meter in the northern shelf zone to more than 3000 in in the southern part. In the archipelago region, the presence of islands alters amplitude and direction of tidal currents producing a rectification process which is reflected in a clockwise circulation around Tiburon Island in the Lagrangian residual current. The rectification process is explained by the superposition of the Euler and Stokes residual currents. Residual current patterns show several cyclonic and anticyclonic gyres in the Northern Gulf of California. Numerical experiments for individual and combinations of several tidal constituents revealed a large variability of Lagrangian trajectories. (C) 2017 Elsevier Ltd. All rights reserved.
机译：考虑到科里奥利项的半隐式近似，提出了运动的垂直积分方程的数值解。为了测试二维数值模型，进行了一些计算加利福尼亚湾欧拉，斯托克斯和拉格朗日剩余电流的实验。为了估计拉格朗日剩余电流，还模拟了粒子的轨迹。施加的潮汐成分是M-2，S-2，K-2，N-2，P-1和O-1。在春季潮汐时，强烈的潮汐速度出现在海湾的北半部。在这个复杂的几何区域，深度从北部陆架区的几米到南部的3000多个。在群岛地区，岛屿的存在改变了潮流的幅度和方向，从而产生了整流过程，这反映在拉格朗日剩余电流中的蒂伯龙岛周围的顺时针环流中。欧拉和斯托克斯剩余电流的叠加说明了整流过程。残留电流模式显示了加利福尼亚北部湾的数个气旋和反气旋回旋。几个潮汐成分的个体和组合的数值实验表明，拉格朗日轨迹的变化很大。 （C）2017 Elsevier Ltd.保留所有权利。

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