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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Contribution of Electron Pressure to Ring Current and Ground Magnetic Depression Using RAM-SCB Simulations and Arase Observations During 7-8 November 2017 Magnetic Storm
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Contribution of Electron Pressure to Ring Current and Ground Magnetic Depression Using RAM-SCB Simulations and Arase Observations During 7-8 November 2017 Magnetic Storm

机译：电子压力环电流的贡献和地面磁使用RAM-SCB抑郁模拟和Arase观察在7 - 82017年11月磁暴

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摘要

Understanding the physical processes that control the dynamics of energetic particles in the inner magnetosphere is important for both space-borne and ground-based assets essential to the modern society. The storm time distribution of ring current particles in the inner magnetosphere depends strongly on their transport in the evolving electric and magnetic fields along with particle acceleration and loss. In this study, we investigated the ring current particle variations using observations and simulations. We compared the ion (H+, He+, and O+) and electron flux and plasma pressure variations from Arase observations with the self-consistent inner magnetosphere model: Ring current Atmosphere interactions Model with Self Consistent magnetic field (RAM-SCB) during the 7-8 November 2017 geomagnetic storm. We investigated the contribution of the different species (ions and electrons) to the magnetic field deformation observed at ground magnetic stations (09°-45° MLat) using RAM-SCB simulations. The results show that the ions are the major contributor with ~88% and electrons contribute ~12% to the total ring current pressure. It is also found that the electron contribution is non-negligible (~18%) to the ring current in dawn-side during the main phase of the storm. Thus, the electron contribution to the storm time ring current is important and should not be neglected.
机译：理解控制的物理过程高能粒子的内在的动力对太空磁气圈是非常重要的现代和地面资产必不可少的的社会。当前粒子的磁气圈很大程度上取决于他们的运输变化的电场和磁场粒子加速和损失。调查了当前粒子环变化通过观察和模拟。离子(H +, + O +)和电子通量从Arase等离子体的压力变化观察自洽的内心磁气圈模型:当前大气环用自洽磁相互作用模型字段(RAM-SCB)在2017年11月7 - 8地磁风暴。不同种类的离子和贡献电子)磁场变形观察到地面磁站(09°-45°使用RAM-SCB模拟MLat)。离子是~ 88%的主要因素和电子的贡献~ 12%总戒指目前的压力。电子贡献不小(~ 18%)当前在dawn-side主要环阶段的风暴。对风暴时间环电流的贡献重要的,不应该被忽视。

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