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首页> 外文期刊>Studies in Applied Mathematics >Wave-mean-flow interactions in a forced Rossby wave packet critical layer
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Wave-mean-flow interactions in a forced Rossby wave packet critical layer

机译：强迫Rossby波包临界层中的波均流相互作用

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This paper describes the nonlinear critical layer evolution of a zonally localized Rossby wave packet forced in mid-latitudes and propagating horizontally on a beta plane in a zonal shear flow. The wave packet has an amplitude that varies slowly in the zonal direction. Numerical solutions of the governing nonlinear equations show that the wave-mean-flow interactions differ from those that would result with a monochromatic forcing. With the localized forcing, the net absorption of the disturbance at the critical layer continues for large time, because there is an outward flux of momentum in the zonal direction. Further insight into the mechanism for this and other aspects of the evolution of the critical layer is obtained through an approximate asymptotic analysis which is valid for large time. [References: 31]
机译：本文描述了在中纬度受迫并在β平面内水平传播的带状局部Rossby波包的非线性临界层演化。波包的幅度在纬向方向上缓慢变化。控制非线性方程的数值解表明，波均值相互作用不同于单色强迫所产生的相互作用。在局部作用力的作用下，关键区域的扰动净吸收将持续大量时间，因为在区域方向上有向外的动量通量。通过对大部分时间有效的近似渐近分析，可以进一步了解临界层演化的这一方面和其他方面的机制。 [参考：31]

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