GSTDTAP  > 气候变化
DOI10.1029/2019GL084822
Modeling the Electron Flux Enhancement and Butterfly Pitch Angle Distributions on L Shells <2.5
Hua, Man1,2; Li, W.2; Ma, Qianli2,3; Ni, Binbin1,4; Nishimura, Yukitoshi2; Shen, Xiao-chen2; Li, Haimeng2,5
2019-10-29
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
文章类型Article;Early Access
语种英语
国家Peoples R China; USA
英文摘要

We analyze an energetic electron flux enhancement event in the inner radiation belt observed by Van Allen Probes during an intense geomagnetic storm. The energetic electron flux at L similar to 1.5 increased by a factor of 3 with pronounced butterfly pitch angle distributions (PADs). Using a three-dimensional radiation belt model, we simulate the electron evolution under the impact of radial diffusion, local wave-particle interactions including hiss, very low frequency transmitters, and magnetosonic waves, as well as Coulomb scattering. Consistency between observation and simulation suggests that inward radial diffusion plays a dominant role in accelerating electrons up to 900 keV and transporting the butterfly PADs from higher L shells to form the butterfly PADs at L similar to 1.5. However, local wave-particle interactions also contribute to drive butterfly PADs at L greater than or similar to 1.9. Our study provides a feasible mechanism to explain the electron flux enhancement in the inner belt and the persistent presence of the butterfly PADs at L similar to 1.5.


英文关键词three-dimensional radial belt modeling electron flux enhancement inward radial diffusion butterfly pitch angle distribution local wave-particle interactions inner belt and slot region
领域气候变化
收录类别SCI-E
WOS记录号WOS:000493040100001
WOS关键词RADIATION BELT ELECTRONS ; RELATIVISTIC ELECTRONS ; PLASMASPHERIC HISS ; RESONANT SCATTERING ; MAGNETOSONIC WAVES ; ENERGY ; ZONE ; STORM ; SENSITIVITY ; PROTONS
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/187827
专题气候变化
作者单位1.Wuhan Univ, Sch Elect Informat, Dept Space Phys, Wuhan, Hubei, Peoples R China;
2.Boston Univ, Ctr Space Phys, Boston, MA 02215 USA;
3.UCLA, Dept Atmospher & Ocean Sci, Los Angeles, CA USA;
4.CAS Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China;
5.Nanchang Univ, Inst Space Sci & Technol, Nanchang, Jiangxi, Peoples R China
推荐引用方式
GB/T 7714
Hua, Man,Li, W.,Ma, Qianli,et al. Modeling the Electron Flux Enhancement and Butterfly Pitch Angle Distributions on L Shells <2.5[J]. GEOPHYSICAL RESEARCH LETTERS,2019.
APA Hua, Man.,Li, W..,Ma, Qianli.,Ni, Binbin.,Nishimura, Yukitoshi.,...&Li, Haimeng.(2019).Modeling the Electron Flux Enhancement and Butterfly Pitch Angle Distributions on L Shells <2.5.GEOPHYSICAL RESEARCH LETTERS.
MLA Hua, Man,et al."Modeling the Electron Flux Enhancement and Butterfly Pitch Angle Distributions on L Shells <2.5".GEOPHYSICAL RESEARCH LETTERS (2019).
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