Evolution of the outer radiation belt during the November 1993 storms driven by corotating interaction regions
Evolution of the outer radiation belt during the November 1993 storms driven by corotating interaction regions
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DOI：
10.1029/2006ja012148
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发表时间：
2007-05
影响因子：
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通讯作者：
Y. Miyoshi;A. Morioka;R. Kataoka;Y. Kasahara;T. Mukai
中科院分区：
文献类型：
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作者：
Y. Miyoshi;A. Morioka;R. Kataoka;Y. Kasahara;T. Mukai
[1]在1993年11月的两次共转相互作用区(CIR)驱动的磁暴期间，研究了内磁层高能电子通量的演化、相关的太阳风条件和相关的等离子体波。本文着重讨论了11月3日风暴期间外辐射带电子通量显著增加的事实，而在11月18日风暴期间外辐射带电子通量并没有增加到高于风暴前的水平。11月3日风暴的恢复期与持续的亚暴活动、热电子和亚相对论电子的持续注入以及增强的合唱波活动有关，合唱波活动可以通过波-粒子相互作用将亚相对论电子加速到MeV能量。相比之下，11月18日风暴的恢复阶段与亚暴活动减少、热电子和亚相对论电子的微弱注入以及低合唱波活动有关。这些恢复阶段的差异可能与高速日冕空洞流中行星际磁场(IMF)的南移有关，这是通过Russell-McPherron效应(与IMF极性相关的偶极倾斜效应)受到IMF扇区极性的影响。
[1] Evolution of energetic electron fluxes, related solar wind conditions, and relevant plasma waves in the inner magnetosphere are examined during the two corotating interaction region (CIR)-driven magnetic storms in November 1993. In this paper we focus on the fact that the flux of the outer radiation belt electrons increased significantly during the 3 November storm, while it did not increase above the prestorm level during the 18 November storm. The recovery phase of the 3 November storm is associated with the prolonged substorm activity; continuous injections of hot and subrelativistic electrons, and enhanced chorus wave activity which can accelerate subrelativistic electrons to MeV energies by means of wave-particle interactions. In contrast, the recovery phase of the 18 November storm is associated with reduced substorm activity, weak injections of hot and subrelativistic electrons, and low chorus wave activity. These differences in the recovery phase can be related to the southward offset of interplanetary magnetic field (IMF) in the high-speed coronal hole stream, which is influenced by the IMF sector polarity via the Russell-McPherron effect (dipole tilt effect associated with the IMF polarity).