Zonal Flows in Two-Dimensional Decaying Magnetohydrodynamic Turbulence on a β-Plane

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作者：
T. A. Zinyakov
A. S. Petrosyan
机构：
[1] Russian Academy of Sciences,Space Research Institute
[2] Moscow Institute of Physics and Technology (State University),undefined
来源：
JETP Letters | 2018年 / 108卷
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摘要：
A scale for two-dimensional β-plane magnetohydrodynamic turbulence is proposed that characterizes an upper bound of the energy containing interval similar to a classical Rhines scale for neutral fluid turbulence on a -plane. It is found that only unsteady zonal flows with complex temporal dynamics are formed in two-dimensional magnetohydrodynamic turbulence on the -plane. It is shown that flow nonstationarity is due to the appearance of isotropic magnetic islands caused by the Lorentz force in the system. The characteristic dimensions of a flow are in agreement with the proposed scale.
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页码：85 / 92
页数：7
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