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On Spectral Analysis of Mesoscale Eddies. Part Ⅰ: Linear Analysis

机译:关于中尺度涡流的频谱分析。第一部分:线性分析

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摘要

This study aims to understand the ocean's circulation, which is characterized by the presence of multiple alternating zonal jets and transient mesoscale eddies, by systematic analysis of the underlying linear dynamics of this system. For this purpose, properties of the linear normal modes such as growth rates, dispersion, spatial structure, and nonlinear self-interactions are explored for a hierarchy of idealized, vertically, and horizontally sheared flows with increasing complexity. The authors find that large-scale background vertical shear, alternating multiple zonal jets, bottom friction, and the Reynolds number have important effects on these modes. This study hypothesizes that when these effects are taken into account, the linear results can be used to predict many properties of nonlinear mesoscale eddies. This hypothesis is confirmed in Part II of this paper.
机译:这项研究旨在通过对该系统潜在的线性动力学进行系统分析来了解海洋环流,其特征是存在多个交替的纬向射流和瞬态中尺度涡。为此,针对线性法线模式的特性(例如增长率,色散,空间结构和非线性自相互作用),探索了复杂度不断增加的理想化,垂直和水平剪切流的层次结构。作者发现,大型背景垂直切变,交替的多次纬向射流,底部摩擦和雷诺数对这些模式具有重要影响。本研究假设,考虑到这些影响,线性结果可用于预测非线性中尺度涡旋的许多性质。该假设在本文的第二部分得到了证实。

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  • 来源
    《Journal of Physical Oceanography》 |2013年第12期|2505-2527|共23页
  • 作者

    P. Berloff; I. Kamenkovich;

  • 作者单位

    Department of Mathematics, Imperial College London, Huxley Blag., London, SW7 2AZ, United Kingdom;

    Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida;

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  • 正文语种 eng
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