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A Dynamical Model for the Leeuwin Undercurrent

机译:吕温暗流的动力学模型

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摘要

Recently, Furue et al. explored analytic solutions to a dynamical model for the Leeuwin Current system (LCS) off the coast of Western Australia. Their linear, variable density, two-layer model reduces to a one-layer system near the coast. The circulation is determined by matching solutions in the coastal and offshore regions across the "grounding line" and displays many features observed in the LCS. However, it does not include a Leeuwin Undercurrent (LUC). Here, that model is extended considering an across-shore density gradient (front) caused by relatively light, tropical water being carried poleward by the Leeuwin Current (LC). As a result of including the front, the LCS circulation changes considerably; the LC deepens and strengthens significantly toward the pole, and the LCS now includes an equatorward LUC on the offshore edge of the LC. Differences in density and sea surface height across the front both contribute to the pressure gradient driving the LUC.
机译:最近,Furue等人。探索了西澳大利亚州沿海的Leeuwin Current系统(LCS)动力学模型的解析解。他们的线性,可变密度的两层模型简化为海岸附近的一层系统。循环是通过匹配“接地线”的沿海和近海区域中的解决方案来确定的,并显示了在LCS中观察到的许多特征。但是,它不包括Leeuwin欠电流(LUC)。在这里,考虑到由相对较轻的热带水通过吕氏流(LC)极向带走而引起的跨岸密度梯度(前部),对该模型进行了扩展。由于包括前部,LCS循环会发生很大变化; LC向极点加深并明显增强,LCS现在在LC的近海边缘包括赤道LUC。前缘的密度和海面高度的差异都有助于驱动LUC的压力梯度。

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  • 来源
    《Journal of Physical Oceanography》 |2014年第7期|1798-1810|共13页
  • 作者

    Fabian Schloesser;

  • 作者单位

    Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Road, Narragansett, RI 02882;

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  • 原文格式 PDF
  • 正文语种 eng
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