On Secondary Baroclinic Instability and the Meridional Scaleof Motion in the Ocean
On Secondary Baroclinic Instability and the Meridional Scaleof Motion in the Ocean
复制标题
海洋次生斜压不稳定性和经向运动尺度
DOI：
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发表时间：
1975
期刊：
影响因子：
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通讯作者：
J. Pedlosky
中科院分区：
文献类型：
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作者：
J. Pedlosky
本文研究了均匀纬向切变流中边缘稳定斜压波的稳定性。虽然水平均匀斜压流上的单次、边缘稳定波几乎没有或没有横流变化，但本文指出，这种斜压波本身对于尺度为Rossby变形半径量级的波是不稳定的。这一结果的海洋中尺度动力学的影响进行了讨论，因为不稳定，whichecurs在一个三重共振的形式，可能会提供一个限制振幅的机制，忽略了单波稳定性分析。
Abstract The stability of the marginally stable baroclinic wave in a uniform zonal shear flow is studied. Although thesingle, marginally stable wave on a horizontally uniform baroclinic current has little or no cross-streamvariation, the present paper shows that such a baroclinic wave is itself unstable to waves whose meridionalscale is of the order of the Rossby deformation radius. The implications of this result for oceanic mesoscale dynamics is discussed since the instability, whichoccurs in the form of a triad resonance, may provide an amplitude limiting mechanism ignored in single-wave stability analyses.