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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Electrodynamical Coupling of the Geospace System During Solar Flares
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Electrodynamical Coupling of the Geospace System During Solar Flares

机译：Electrodynamical地球空间的耦合系统在太阳耀斑

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摘要

Reduced daytime upward E×B drifts and weakened fountain effects in equatorial ionosphere have been frequently observed during the initial stage of solar flares. The cause of this phenomenon, however, remains unresolved. The latest state-of-art whole geospace model provides an unprecedented opportunity to explore the origin of this response. We show that both prompt penetration electric fields (PPEFs) and internal changes in the wind dynamo process are responsible for the reduced upward ion drifts. Solar-flare-induced PPEFs are caused by a reduced high-latitude potential as a result of flare-enhanced ionospheric conductances which are distinct from traditional PPEFs that respond to changes in solar wind conditions or magnetosphere dynamics. The neutral wind dynamo source is mainly a reduction in the background low-latitude eastward electric field. This reduction occurs to maintain current continuity in response to the flare enhancement of low-latitude Cowling conductance that is relatively greater than the enhancement of the dynamo current source.
机译：减少白天向上E×B漂移和削弱喷泉在赤道电离层的影响经常被观察到在最初阶段太阳耀斑。然而,仍未得到解决。技术发展水平整个地球空间提供了一个模型前所未有的机会去探索原点这样的反应。电场(PPEFs)和内部渗透风力发电机过程的变化负责降低上行离子漂移。Solar-flare-induced PPEFs减少引起的高纬度地区潜在的结果flare-enhanced电离层的电导有别于传统PPEFs回应太阳风条件或磁场的变化动力学。主要背景低纬度的减少向东电场。保持当前的连续性的耀斑低纬度整流罩的增强电导是相对比提高发电机的电流源。

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