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首页> 外文期刊>Journal of Physical Oceanography >Rossby Waves with Continuous Stratification and Bottom Friction
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Rossby Waves with Continuous Stratification and Bottom Friction

机译：具有连续分层和底摩擦的Rossby波

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摘要

Published observations of subinertial ocean current variability show that the vertical structure is often well described by a vertical mode that has a node of horizontal velocity at the bottom rather than the traditional node of vertical velocity. The theory of forced and free linear Rossby waves in a continuously stratified ocean with a sloping bottom and bottom friction is treated here to see if frictional effects can plausibly contribute to this phenomenon. For parameter values representative of the mesoscale, bottom dissipation by itself appears to be too weak to be an explanation, although caution is required because the present approach uses a linear model to address a nonlinear phenomenon. One novel outcome is the emergence of a short-wave, bottom-trapped, strongly damped mode that is present even with a flat bottom.
机译：已发表的关于惯性洋流变化的观测结果表明，垂直结构通常可以通过垂直模式很好地描述，该模式在底部具有水平速度的节点，而不是传统的垂直速度节点。在这里，研究了在具有倾斜的底部和底部摩擦的连续分层海洋中的强迫和自由线性Rossby波理论，以观察摩擦效应是否可以合理地导致这种现象。对于代表中尺度的参数值，底部耗散本身似乎太弱而无法解释，尽管需要谨慎，因为本方法使用线性模型来解决非线性现象。一种新颖的结果是出现了短波，陷于底部的强阻尼模式，即使在平坦的底部也存在这种模式。

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