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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Global MHD simulations of the strongly driven magnetosphere: Modeling of the transpolar potential saturation
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Global MHD simulations of the strongly driven magnetosphere: Modeling of the transpolar potential saturation

机译：全球磁流体动力模拟的强烈驱动的经过北极的磁气圈:建模潜在的饱和

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摘要

When the magnetosphere-ionosphere system is driven strongly by the solar wind, the ionospheric transpolar potential tends to saturate. The global MHD simulations are used to study this phenomenon and, in particular, the role the ionospheric conductance plays in controlling the dayside reconnection and the transpolar potentials. The feedback of the ionospheric conductance enhanced due to a high solar wind activity leads to changes in the global configuration of the solar wind-magnetosphere-ionosphere system. The changes in the size of the magnetopause and the associated reconfiguration of the magnetosheath flow lead to a reduction of the reconnection and consequently the transpolar potentials. Thus the solar wind has two competing effects on the transpolar potential, namely, the direct amplification by the solar wind electric field and the feedback of the ionospheric conductance on the reconnection potential.
机译：当magnetosphere-ionosphere系统驱动的强烈的太阳风,电离层经过北极的潜在趋向于饱和。全球磁流体动力模拟被用来研究这个现象,尤其是角色电离层电导在控制的光面重新连接和经过北极的潜力。电导增强由于太阳风活动会导致全球的变化太阳能的配置wind-magnetosphere-ionosphere系统。在磁层的大小和磁鞘的重构有关导致重新连接的减少和流动因此经过北极的潜力。太阳风有两个相互竞争的影响经过北极的潜力,即直接放大由太阳风电场和电离层电导的反馈重新连接上的潜力。

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