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首页> 外文期刊>Geomagnetism and aeronomy >Numerical model for Zonal Flow Generation by Magnetized Rossby Waves in the Ionosphere with the Background Shear Flow
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Numerical model for Zonal Flow Generation by Magnetized Rossby Waves in the Ionosphere with the Background Shear Flow

机译：用背景剪切流动磁化罗斯比波的区间磁化罗斯比波的数值模型

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摘要

A theoretical-numerical description of zonal flow generation in the turbulent ionosphere by controlled inhomogeneous background wind is given. The generalized Charney-Obukhov equation, which describes the nonlinear interaction of five different-scale modes (primary modes, relatively short-wave ultra-low frequency (ULF) magnetized Rossby waves (MRWs) (pumping waves), two satellites of these MRWs, long-wave zonal mode, and large-scale background shear flows (inhomogeneous wind)) is used. New features of energy transfer from relatively small-scale waves and the background shear flow into that of largescale zonal flows and nonlinear self-organization of the five-wave collective activity in the ionospheric medium are identified based on the numerical solution of the corresponding system of equations for perturbation amplitudes (generalized eigenvalue problems). It is shown that if there is the background shear flow with a moderate amplitude growth the modulation instability increment and intensifies the zonal flow generation, while a very strong shear flow significantly reduces the modulation instability increment and can even suppress the generation process.
机译：给出了受控的不均匀背景风湍流电离层中区间流动产生的理论值的数字描述。通用Charney-Obukhov方程，其描述了五种不同尺度模式的非线性相互作用（主要模式，相对短波超低频率（ULF）磁化Rossby波（MRWS）（泵浦），这些MRW的两个卫星，使用长波划线模式和大规模背景剪切流（不均匀风））。基于相应系统的数值求解，鉴定了从相对小的波和电离区域介质中的五波集体活性的大型流动流动和非线性自组织的新功能的新特征是基于相应系统的数值解扰动振幅的方程（广义特征值问题）。结果表明，如果存在具有中等幅度生长的背景剪切流量，调制不稳定性增加并强化区域流动产生，而非常强的剪切流程显着降低了调制不稳定增量，并且甚至可以抑制生成过程。

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