β-plane magnetohydrodynamic turbulence in the solar tachocline

被引：84
|
作者：
Tobias, Steven M. [1 ]
Diamond, Patrick H.
Hughes, David W.
机构：
[1] Univ Leeds, Dept Math Appl, Leeds LS2 9JT, W Yorkshire, England
[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
来源：
ASTROPHYSICAL JOURNAL | 2007年 / 667卷 / 01期
基金：
英国科学技术设施理事会;
关键词：
MHD; Sun : interior; Sun : magnetic fields; turbulence;
D O I：
10.1086/521978
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 beta-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.
引用
收藏
页码：L113 / L116
页数：4
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