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DOI | 10.1029/2019GL085091 |
Statistical Study of Energetic Electron Butterfly Pitch Angle Distributions During Magnetic Dip Events | |
Xiong, Ying; Xie, Lun; Fu, Suiyan; Pu, Zuyin | |
2019-12-10 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:23页码:13621-13629 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The magnetic dips can create the electron butterfly pitch angle distribution (PAD) in the inner magnetosphere. However, its universality is still unconfirmed. We statistically investigate the global distribution of the occurrence rate of the magnetic dip-related butterfly PAD for 466 keV and 2.1 MeV electrons using the measurements of the twin Van Allen Probes spanning from September 2012 to November 2018. The statistical results show that the magnetic dip-related butterfly PADs are mainly confined to duskside to midnight within 4.5 < L < 6, and the peak occurrence rate (30% for 466 KeV and 70% for 2.1 MeV) occurs at the duskside equator around L = 5. The parametric study results suggest that the butterfly PADs preferably occur for high energy electrons with a negative initial radial flux gradient and a nearly isotropic initial PAD, which is consistent with the statistic results. This work confirms the vital importance of the magnetic dips on the evolution of the electron PADs. |
英文关键词 | radiation belt magnetic dip butterfly pitch angle distribution |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000501983700001 |
WOS关键词 | RADIATION BELT ; RELATIVISTIC ELECTRONS ; PLASMA INJECTION ; EVOLUTION |
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/225175 |
专题 | 环境与发展全球科技态势 |
作者单位 | Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Xiong, Ying,Xie, Lun,Fu, Suiyan,et al. Statistical Study of Energetic Electron Butterfly Pitch Angle Distributions During Magnetic Dip Events[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(23):13621-13629. |
APA | Xiong, Ying,Xie, Lun,Fu, Suiyan,&Pu, Zuyin.(2019).Statistical Study of Energetic Electron Butterfly Pitch Angle Distributions During Magnetic Dip Events.GEOPHYSICAL RESEARCH LETTERS,46(23),13621-13629. |
MLA | Xiong, Ying,et al."Statistical Study of Energetic Electron Butterfly Pitch Angle Distributions During Magnetic Dip Events".GEOPHYSICAL RESEARCH LETTERS 46.23(2019):13621-13629. |
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