Selection of baroclinic waves
Selection of baroclinic waves
复制标题
斜压波的选择
DOI：
--
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
J. Appleby
中科院分区：
文献类型：
--
作者：
J. Appleby
对两个离散波长同时不稳定的双层斜压流会通过波的自相互作用而改变，以便任一者都可以在有限振幅下达到平衡。在没有滞后现象的情况下，两种可能状态的稳定性以及由此产生的一种主波长的“选择”是由最小可用势能原理决定的。在弱非线性的限制下，这相当于最大正压振幅，但通常不等于先前建议的每层内的最大波振幅。
A two-layer baroclinic flow simultaneously unstable to two discrete wavelengths is altered by the self-interaction of the waves so that either may attain an equilibrium at finite amplitude. The stability of the two possible states, and hence the ‘selection’ by the flow of one predominant wavelength, is determined, in the absence of hysteresis, by a principle of minimum available potential energy. In the limit of weak nonlinearity this is equivalent to maximum barotropic amplitude, but not in general to maximum wave amplitude within each layer as previously suggested.