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DOI | 10.1029/2019GL084822 |
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
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
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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