BARREL observations of an ICME‐shock impact with the magnetosphere and the resultant radiation belt electron loss
BARREL observations of an ICME‐shock impact with the magnetosphere and the resultant radiation belt electron loss
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ICME 冲击对磁层的影响以及由此产生的辐射带电子损失的 BARREL 观测
DOI：
10.1002/2014ja020873
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. F. Fennell
中科院分区：
文献类型：
--
作者：
A. Halford;S. L. McGregor;K. Murphy;Robyn Millan;Mary Hudson;L. Woodger;C. A. Cattel;A. Breneman;Ian Mann;W. Kurth;G. Hospodarsky;M. Gkioulidou;J. F. Fennell
与范艾伦探测器协同工作的辐射带相对论电子损失气球阵列（BARREL）任务旨在研究辐射带电子向电离层和高层大气的损失。BARREL对其他来源的X射线也很敏感。在第二次BARREL活动期间，太阳产生了一次X级耀斑，随后发生了与同一活动区域相关的太阳高能粒子事件（SEP）。两天后的2014年1月9日，当BARREL与范艾伦探测器紧密结合时，来自活跃区域的日冕物质抛射（CME）产生的冲击波袭击了地球。亚暴期间的时间历史事件和宏观尺度相互作用（THEMIS）卫星观测到了磁层顶附近的行星际CME （ICME）冲击的影响，地球同步运行环境卫星（GOES）位于BARREL/Van Allen探针阵列的两侧。太阳行星际磁场的理想方向并不能引起显著的地磁风暴，但激波冲击的压缩导致辐射带电子的损失。我们提出磁层顶压缩产生的方位电场脉冲导致电子向内输运和最小损失。这个过程也驱动了合唱波，这是在等离子体顶外观测到的大部分降水的原因。对等离子体顶内部的嘶嘶声的观察解释了在这个位置没有损失。发现超低频波与降水结构相关。我们展示了BARREL如何在摇篮到坟墓的视图中监测ICME冲击对地球的影响后的降水；从耀斑到SEP，再到电子沉淀。
The Balloon Array for Radiation belt Relativistic Electron Losses (BARREL) mission of opportunity working in tandem with the Van Allen Probes was designed to study the loss of radiation belt electrons to the ionosphere and upper atmosphere. BARREL is also sensitive to X‐rays from other sources. During the second BARREL campaign, the Sun produced an X‐class flare followed by a solar energetic particle event (SEP) associated with the same active region. Two days later on 9 January 2014, the shock generated by the coronal mass ejection (CME) originating from the active region hits the Earth while BARREL was in a close conjunction with the Van Allen Probes. Time History Events and Macroscale Interactions during Substorms (THEMIS) satellite observed the impact of the interplanetary CME (ICME) shock near the magnetopause, and the Geostationary Operational Environmental Satellites (GOES) were on either side of the BARREL/Van Allen Probe array. The solar interplanetary magnetic field was not ideally oriented to cause a significant geomagnetic storm, but compression from the shock impact led to the loss of radiation belt electrons. We propose that an azimuthal electric field impulse generated by magnetopause compression caused inward electron transport and minimal loss. This process also drove chorus waves, which were responsible for most of the precipitation observed outside the plasmapause. Observations of hiss inside the plasmapause explain the absence of loss at this location. ULF waves were found to be correlated with the structure of the precipitation. We demonstrate how BARREL can monitor precipitation following an ICME‐shock impact at Earth in a cradle‐to‐grave view; from flare, to SEP, to electron precipitation.
用于 RBSP 相对论电子损耗的气球阵列 (BARREL)
影响因子：
10.3
作者：
Millan R
通讯作者：
Millan R