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Saturn's Inner Magnetospheric Convection in the View of Zebra Stripe Patterns in Energetic Electron Spectra

文献类型：期刊论文

作者Sun, Y. X.1,4; Roussos, E.4; Hao, Y. X.1,4; Zong, Q-G1; Liu, Y.1; Lejosne, S.2; Pan, D. X.3; Zhou, X-Z1; Yue, C.1; Krupp, N.4
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2021-10-01
卷号126期号:10页码:13
关键词Saturn magnetosphere electron radiation belt
ISSN号2169-9380
DOI10.1029/2021JA029600
英文摘要Banded structures observed in energetic particle spectrograms in the Earth's inner radiation belt and slot region, that is, "zebra stripes," have been resolved in the Saturnian magnetosphere with Cassini. This study implements a large-scale statistical analysis of Saturnian zebra stripe properties in association with the noon-to-midnight electric field of the inner magnetosphere to which the stripes' origin was recently established. Cassini has detected zebra stripes extending between L-shells (L) of 5-9 for more than half of the orbits that crossed inward of L = 9. The amplitude of the stripes is 15-20% on average above the background differential energy flux, and their age is estimated to be 20-60 hr. The regular observation of zebra stripes suggests that their regeneration and the corresponding electric field enhancements develop over timescales comparable to their estimated lifetime (days), revealing that internal processes contribute to the electric field dynamics, in addition to a solar wind-induced variability indicated by previous investigations. The flux-enhanced stripes are traced back to the dayside, preferentially from postnoon, indicating an electric field orientation from postnoon to postmidnight. Our results further suggest that the electric field's offset from the noon-midnight line is subject to both L-shell and temporal dependencies, confirming the previous inferred variability.
WOS关键词RADIATION BELT ; TRAPPED ELECTRONS ; FIELD ; ACCELERATION ; EVOLUTION ; MULTIPLE ; PROTONS ; REGION ; DRIFTS ; MOTION
资助项目National Natural Science Foundation of China[42011530080] ; China Space Agency project[D020301] ; China Space Agency project[D020303] ; German Space Agency (DLR)[50 OH 1101] ; German Space Agency (DLR)[50 OH 1502] ; Max Planck Society
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000711498900012
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Space Agency project ; China Space Agency project ; German Space Agency (DLR) ; German Space Agency (DLR) ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Space Agency project ; China Space Agency project ; German Space Agency (DLR) ; German Space Agency (DLR) ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Space Agency project ; China Space Agency project ; German Space Agency (DLR) ; German Space Agency (DLR) ; Max Planck Society ; Max Planck Society ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Space Agency project ; China Space Agency project ; German Space Agency (DLR) ; German Space Agency (DLR) ; Max Planck Society ; Max Planck Society
源URL[http://ir.iggcas.ac.cn/handle/132A11/103798]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Zong, Q-G
作者单位1.Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China
2.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
4.Max Planck Inst Solar Syst Res, Gottingen, Germany
推荐引用方式
GB/T 7714		 Sun, Y. X.,Roussos, E.,Hao, Y. X.,et al. Saturn's Inner Magnetospheric Convection in the View of Zebra Stripe Patterns in Energetic Electron Spectra[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2021,126(10):13.
APA Sun, Y. X..,Roussos, E..,Hao, Y. X..,Zong, Q-G.,Liu, Y..,...&Krupp, N..(2021).Saturn's Inner Magnetospheric Convection in the View of Zebra Stripe Patterns in Energetic Electron Spectra.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,126(10),13.
MLA Sun, Y. X.,et al."Saturn's Inner Magnetospheric Convection in the View of Zebra Stripe Patterns in Energetic Electron Spectra".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 126.10(2021):13.

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来源：地质与地球物理研究所

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