globalchange  > 科学计划与规划
DOI: 10.1002/2016GL070194
论文题名:
Rapid flattening of butterfly pitch angle distributions of radiation belt electrons by whistler-mode chorus
作者: Yang C.; Su Z.; Xiao F.; Zheng H.; Wang Y.; Wang S.; Spence H.E.; Reeves G.D.; Baker D.N.; Blake J.B.; Funsten H.O.
刊名: Geophysical Research Letters
ISSN: 0094-8741
EISSN: 1944-8472
出版年: 2016
卷: 43, 期:16
起始页码: 8339
结束页码: 8347
语种: 英语
英文关键词: butterfly pitch-angle distribution ; chorus waves ; quasi-linear simulation ; Radiation belt ; Van Allen Probes ; wave/particle interactions
Scopus关键词: Electromagnetic waves ; Electrons ; Ionizing radiation ; Probes ; Radiation ; Radiation belts ; Chorus waves ; Electron pitch angle ; Physical mechanism ; Pitch angle distribution ; Quasi-linear ; Radiation belt electrons ; Van allen radiation belts ; Whistler-mode chorus ; Atmospherics
英文摘要: Van Allen radiation belt electrons exhibit complex dynamics during geomagnetically active periods. Investigation of electron pitch angle distributions (PADs) can provide important information on the dominant physical mechanisms controlling radiation belt behaviors. Here we report a storm time radiation belt event where energetic electron PADs changed from butterfly distributions to normal or flattop distributions within several hours. Van Allen Probes observations showed that the flattening of butterfly PADs was closely related to the occurrence of whistler-mode chorus waves. Two-dimensional quasi-linear STEERB simulations demonstrate that the observed chorus can resonantly accelerate the near-equatorially trapped electrons and rapidly flatten the corresponding electron butterfly PADs. These results provide a new insight on how chorus waves affect the dynamic evolution of radiation belt electrons. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983395302&doi=10.1002%2f2016GL070194&partnerID=40&md5=619d6071947896d0b4f10e436ad63807
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9704
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Geophysics and Planetary Sciences, University of Science and Technology of China, Hefei, China

Recommended Citation:
Yang C.,Su Z.,Xiao F.,et al. Rapid flattening of butterfly pitch angle distributions of radiation belt electrons by whistler-mode chorus[J]. Geophysical Research Letters,2016-01-01,43(16).
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