The Outer Radiation Belt Response to the Storm Time Development of Seed Electrons and Chorus Wave Activity During CME and CIR Driven Storms

被引：40

作者：

Bingham, S. T. ^{[1
]}

Mouikis, C. G. ^{[1
]}

Kistler, L. M. ^{[1
]}

Boyd, A. J. ^{[2
]}

Paulson, K. ^{[1
]}

Farrugia, C. J. ^{[1
]}

Huang, C. L. ^{[1
]}

Spence, H. E. ^{[1
]}

Claudepierre, S. G. ^{[3
]}

Kletzing, C. ^{[4
]}

机构：

[1] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA

[2] New Mexico Consortium, Los Alamos, NM USA

[3] Aerosp Corp, Space Sci Dept, El Segundo, CA 90245 USA

[4] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2018年 / 123卷 / 12期

关键词：

radiation belts; seed electrons; very low frequency waves; Van Allen Probes; CME storms; CIR storms; HIGHLY RELATIVISTIC ELECTRONS; PHASE-SPACE DENSITY; SOLAR-WIND; GEOMAGNETIC STORMS; STATISTICAL PROPERTIES; MAGNETOSPHERIC CONVECTION; PLASMASPHERIC HISS; LOCAL ACCELERATION; MAGNETIC STORM; DYNAMICS;

D O I：

10.1029/2018JA025963

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gyroresonant wave-particle interactions with very low frequency whistler mode chorus waves can accelerate subrelativistic seed electrons (hundreds of keV) to relativistic energies in the outer radiation belt during geomagnetic storms. In this study, we conduct a superposed epoch analysis of the chorus wave activity, the seed electron development, and the outer radiation belt electron response between L* = 2.5 and 5.5, for 25 coronal mass ejection and 35 corotating interaction region storms using Van Allen Probes observations. Electron data from the Magnetic Electron Ion Spectrometer and Relativistic Electron Proton Telescope instruments are used to monitor the storm-phase development of the seed and relativistic electrons, and magnetic field measurements from the Electric and Magnetic Field Instrument Suite and Integrated Science instrument are used to identify the chorus wave activity. Our results show a deeper (lower L*), stronger (higher flux), and earlier (epoch time) average seed electron enhancement and a resulting greater average radiation belt electron enhancement in coronal mass ejection storms compared to the corotating interaction region storms despite similar levels and lifetimes of average chorus wave activity for the two storm drivers. The earlier and deeper seed electron enhancement during the coronal mass ejection storms, likely driven by greater convection and substorm activity, provides a higher probability for local acceleration. These results emphasize the importance of the timing and the level of the seed electron enhancements in radiation belt dynamics.

引用

页码：10139 / 10157

页数：19

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