Marginal Instability and the Efficiency of Ocean Mixing

Smyth W. D.

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Marginal Instability and the Efficiency of Ocean Mixing

机译：边缘不稳定与海洋混合效率

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The mixing efficiency of stratified turbulence in geophysical fluids has been the subject of considerable controversy. A simple parameterization, devised decades ago when empirical knowledge was scarce, has held up remarkably well. The parameterization rests on the assumption that the flux coefficient Gamma has the uniform value 0.2. This note provides a physical explanation for Gamma = 0.2 in terms of the "marginal instability" property of forced stratified shear flows, and also sketches a path toward improving on that simple picture by examining cases where it fails.

机译：地球物理流体中分层湍流的混合效率一直是相当争议的主题。在经验知识稀缺时，几十年前设计了一个简单的参数化，非常好。参数化依次假设磁通系数伽马有0.2的均匀值。本说明在强制分层剪切流的“边际不稳定性”属性方面为Gamma = 0.2提供了物理说明，并且还通过检查其失败的情况来绘制一条朝向该简单图像的路径。

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《Journal of Physical Oceanography》 |2020年第8期|2141-2150|共10页
作者
Smyth W. D.;
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Oregon State Univ Coll Earth Ocean & Atmospher Sci Corvallis OR 97331 USA;

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机译：边缘不稳定与海洋混合效率
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Marginal Instability and the Efficiency of Ocean Mixing

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