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DOI | 10.1029/2019GL086368 |
Global Simulation of Electron Cyclotron Harmonic Wave Instability in a Storm-Time Magnetosphere | |
Liu, Xu1; Chen, Lunjin1; Engel, Miles A.2; Jordanova, Vania K.2 | |
2020-03-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Electron cyclotron harmonic (ECH) waves are electrostatic emissions between the ECHs and play a dominant role for precipitating energetic electrons in the magnetotail. Statistically, the ECH wave intensity is stronger at nightside and dawnside than at dayside and duskside. In this study, we, for the first time, simulate the global ECH wave evolution during a geomagnetic storm event using Ring current Atmosphere interactions Model with Self-Consistent Magnetic field (RAM-SCB) combined with a linear growth rate solver. We find that the simulation results are generally consistent with the statistical and real-time observations. The ECH wave instability is much stronger at nightside and dawnside, compared to the instability at dayside and duskside. Before a geomagnetic storm (quiet time), the unstable regions of the ECH waves lie beyond 5RE with a weak instability level. During the main phase of a geomagnetic storm, the unstable regions can extend to a lower altitude (3RE) with a strong instability level. During the recovery phase, the unstable regions return to 5 similar to 6RE. We also find that the inner boundary of unstable ECH wave regions is coincident with the plasmapause location during the whole geomagnetic storm event. |
英文关键词 | ECH wave global instability RAM-SCB model geomagnetic storm |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529097700014 |
WOS关键词 | GENERATION ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279804 |
专题 | 气候变化 |
作者单位 | 1.Univ Texas Dallas, William B Hanson Ctr Space Sci, Richardson, TX 75083 USA; 2.Los Alamos Natl Lab, Los Alamos, NM USA |
推荐引用方式 GB/T 7714 | Liu, Xu,Chen, Lunjin,Engel, Miles A.,et al. Global Simulation of Electron Cyclotron Harmonic Wave Instability in a Storm-Time Magnetosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(6). |
APA | Liu, Xu,Chen, Lunjin,Engel, Miles A.,&Jordanova, Vania K..(2020).Global Simulation of Electron Cyclotron Harmonic Wave Instability in a Storm-Time Magnetosphere.GEOPHYSICAL RESEARCH LETTERS,47(6). |
MLA | Liu, Xu,et al."Global Simulation of Electron Cyclotron Harmonic Wave Instability in a Storm-Time Magnetosphere".GEOPHYSICAL RESEARCH LETTERS 47.6(2020). |
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