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首页> 外文期刊>Annales Geophysicae >First-principles modeling of geomagnetically induced electromagnetic fields and currents from upstream solar wind to the surface of the Earth
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First-principles modeling of geomagnetically induced electromagnetic fields and currents from upstream solar wind to the surface of the Earth

机译：地磁诱导电磁场和地球表面上游太阳风电流建模的第一原理

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摘要

Our capability to model the near-space physical phenomena has graduallyreached a level enabling module-based first-principles modeling ofgeomagnetically induced electromagnetic fields and currents from upstreamsolar wind to the surface of the Earth. As geomagnetically induced currents(GIC) pose a real threat to the normal operation of long conductor systems onthe ground, such as high-voltage power transmission systems, it is quiteobvious that success in accurate predictive modeling of the phenomenon wouldopen entirely new windows for operational space weather products.Here we introduce a process for obtaining geomagnetically inducedelectromagnetic fields and currents from the output of global magnetosphericMHD codes. We also present metrics that take into account both the complexnature of the signal and possible forecasting applications of the modelingprocess. The modeling process and the metrics are presented with the help ofan actual example space weather event of 24–29 October 2003. Analysis of theevent demonstrates that, despite some significant shortcomings, some centralfeatures of the overall ionospheric current fluctuations associated with GICcan be captured by the modeling process. More specifically, the basicspatiotemporal morphology of the modeled and "measured" GIC is quitesimilar. Furthermore, the presented user-relevant utility metrics demonstratethat MHD-based modeling can outperform simple GIC persistence models.
机译：我们对近空物理现象进行建模的能力已经逐渐处理了一种基于模块的第一原理的水平，其磁性磁通诱导的电磁场和从上游风的电流到地球表面。由于地磁诱导的电流（GIC）构成了对地面上长导体系统的正常运行的真正威胁，例如高压电力传输系统，它非常方便，在精确的预测建模中取得了完全新的窗口的操作空间。天气产品。 在这里，我们介绍了从全局磁散照片代码的输出获得地磁诱导电磁场和电流的过程。我们还提出了指标，以考虑信号的复杂性和模型过程的可能预测应用。在2003年10月24日至29日的实际示例天气事件的帮助下，提出了建模过程和指标。由于一些重要的缺点，所以仍然存在一些明显的缺点，所以通过了与Giccan相关的整体电离层电流波动的一些集成级别建模过程。更具体地说，模拟和“测量”GIC的基本缺肌形态是QeitaItical的。此外，所呈现的用户相关的公用事业度量规范规范，基于MHD的建模可以胜过简单的GIC持久性模型。

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