β-Plane Magnetohydrodynamic Turbulence in the Solar Tachocline
β-Plane Magnetohydrodynamic Turbulence in the Solar Tachocline
复制标题
太阳速斜层中的 β 平面磁流体动力湍流
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
D. Hughes
中科院分区：
文献类型：
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作者：
S. Tobias;P. Diamond;D. Hughes
本文讨论了弱环向磁场对塔可跃层中稳定分层旋转湍流的湍流输运性质的影响。对局部二维β-平面模型进行了数值研究。在无磁场的情况下，Rossby波的非线性相互作用导致强平均纬向流的形成。然而，即使是一个非常弱的环向场的加入也会抑制平均流的产生。我们认为这对下跃层角动量输运有严重的影响。
This Letter discusses the role of a weak toroidal magnetic field in modifying the turbulent transport properties of stably stratified rotating turbulence in the tachocline. A local two-dimensional β-plane model is investigated numerically. In the absence of magnetic fields, nonlinear interactions of Rossby waves lead to the formation of strong mean zonal flows. However, the addition of even a very weak toroidal field suppresses the generation of mean flows. We argue that this has serious implications for angular momentum transport in the lower tachocline.