黑潮转门机制:高度计流速场的动力学分析
The turnstile mechanism across the Kuroshio current: analysis of dynamics in altimeter velocity fields
摘要:
在这篇文章中,我们将探讨动力系统工具的能力来描述海洋流动的特点,从卫星测量的数据集的运输。特别地,我们研究了描述黑潮区域输运的几何骨架。为此,我们计算了特殊的双曲线轨迹,被认为是杰出的双曲线轨迹,作为组织中心的流动。我们计算了它们的稳定和不稳定流形,它们揭示了旋转门机制在2003年春季的几个月里在黑潮上起作用。我们已经发现,在双曲线轨迹附近发生了一个丝状的运输前沿交叉的电流,混合两侧的水。
英文摘要:
In this article we explore the ability of dynamical systems tools to describe transport in oceanic flows characterized by data sets measured from satellite. In particular we have studied the geometrical skeleton describing transport in the Kuroshio region. For this purpose we have computed special hyperbolic trajectories, recognized as distinguished hyperbolic trajectories, that act as organizing centres of the flow. We have computed their stable and unstable manifolds, and they reveal that the turnstile mechanism is at work during several spring months in the year 2003 across the Kuroshio current. We have found that near the hyperbolic trajectories takes place a filamentous transport front-cross the current that mixes waters at both sides.
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