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首页> 外文期刊>Journal of Physical Oceanography >Response to a Steady Poleward Outflow. Part I: The Linear, Quasigeostrophic Problem
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Response to a Steady Poleward Outflow. Part I: The Linear, Quasigeostrophic Problem

机译：对稳定的多向流出的响应。第一部分：线性拟地转问题

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摘要

The response of a zonal channel to a uniform, switched-on but subsequently steady poleward outflow is presented. An eastward coastal current with a Kelvin wave's cross-shore structure is found to be generated instantly upon initiation of the outflow. The current is essentially in geostrophic balance everywhere except for the vicinity of the outflow channel mouth, where the streamlines must cross planetary vorticity contours to feed the current. The adjustment of this region generates a plume that propagates westward at Rossby wave speeds. The cross-shore structure of the plume varies with longitude, and at any given longitude it evolves with time. The authors show that the plume evolution can be understood both conceptually and quantitatively as the westward propagation of the Kelvin current's meridional spectrum, with each spectral element propagating at its own Rossby wave group velocity.
机译：给出了区域通道对均匀，接通但随后稳定的极向流出的响应。发现具有开尔文波的跨岸结构的向东沿海潮流是在流出开始时立即产生的。除了流出通道口附近，流基本上必须在地转平衡中，在流出通道口附近，流线必须越过行星涡度轮廓以提供电流。该区域的调整会产生羽状流，并以Rossby波速向西传播。羽流的跨岸结构随经度而变化，在任何给定的经度下，其都随时间变化。作者表明，羽流的演化可以在概念上和定量上理解为开尔文流子午线谱向西传播，每个谱元以其自身的Rossby波群速度传播。

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  • 来源
    《Journal of Physical Oceanography》 |2009年第7期|1541-1550|共10页
  • 作者

    Theodore S. Durland; Joseph Pedlosky; Michael A. Spall;

  • 作者单位

    College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331;

    Woods Hole Oceanographic Institution, Woods Hole, Massachusetts;

    Woods Hole Oceanographic Institution, Woods Hole, Massachusetts;

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  • 正文语种 eng
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