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

Sun, Y. X., Roussos, E., Hao, Y. X., Zong, Q.-G., Liu, Y., Lejosne, S., et al. (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): e2021JA029600. doi:10.1029/2021JA029600.

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 Creators:
Sun, Y. X.1, Author
Roussos, Elias1, Author              
Hao, Y. X.1, Author
Zong, Q.-G., Author
Liu, Y., Author
Lejosne, S., Author
Pan, D. X., Author
Zhou, X.-Z., Author
Yue, C., Author
Krupp, Norbert1, Author              
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2021JA029600
 Degree: -

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Title: Journal of Geophysical Research: Space Physics
  Other : JGR-A
  Abbreviation : J. Geophys. Res. - A
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 126 (10) Sequence Number: e2021JA029600 Start / End Page: - Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264