气候变化领域集成服务门户(CCPortal): Distinct Formation and Evolution Characteristics of Outer Radiation Belt Electron Butterfly Pitch Angle Distributions Observed by Van Allen Probes

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DOI	10.1029/2019GL086487
	Distinct Formation and Evolution Characteristics of Outer Radiation Belt Electron Butterfly Pitch Angle Distributions Observed by Van Allen Probes
	Ni B.; Yan L.; Fu S.; Gu X.; Cao X.; Xiang Z.; Zhang Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Using Van Allen Probes pitch angle-resolved electron flux data, we report intriguing events of electron butterfly pitch angle distributions (PADs) at L > ~5.5 on the nightside with distinct durations, i.e., about 9 hr for the 28–29 April 2013 event and over 2 days for the 2–5 May 2013 event. The formation and evolution of the short-duration electron butterfly PADs exhibited insignificant dependence on electron energy, probably resulting from a combination of drift shell splitting, magnetopause shadowing, and wave diffusion, but the long-duration electron butterfly evolution presented strong energy dependence, likely mainly attributed to interactions with MS waves. Both the short-duration and long-duration electron butterfly PADs disappeared closely related to enhanced substorm activities, while the responsible waves could be plasmaspheric hiss or chorus waves. Our results demonstrate that radiation belt electron butterfly PADs are naturally complex in both spatial and temporal scales and well connected to solar wind condition, substorm activity, and magnetospheric wave distribution. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospherics; Electron energy levels; Probes; Radiation belts; Drift shell; magentopause shadowing; Pitch angle distribution; Radiation belt electrons; Wave-particle interactions; Electrons; electron; magnetopause; magnetosphere; probe; solar radiation; solar wind; spatial distribution; wave diffraction
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170692
作者单位	Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan, China; CAS Center for Excellence in Comparative Planetology, Hefei, China; CAS Key Laboratory of Geospace Environment, Department of Geophysics and Planetary Science, University of Science Technology of China, Hefei, China
推荐引用方式 GB/T 7714	Ni B.,Yan L.,Fu S.,et al. Distinct Formation and Evolution Characteristics of Outer Radiation Belt Electron Butterfly Pitch Angle Distributions Observed by Van Allen Probes[J],2020,47(4).
APA	Ni B..,Yan L..,Fu S..,Gu X..,Cao X..,...&Zhang Y..(2020).Distinct Formation and Evolution Characteristics of Outer Radiation Belt Electron Butterfly Pitch Angle Distributions Observed by Van Allen Probes.Geophysical Research Letters,47(4).
MLA	Ni B.,et al."Distinct Formation and Evolution Characteristics of Outer Radiation Belt Electron Butterfly Pitch Angle Distributions Observed by Van Allen Probes".Geophysical Research Letters 47.4(2020).