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  Convection in the Magnetosphere-Ionosphere System: A Multimission Survey of Its Response to IMF By Reversals

Case, N., Grocott, A., Fear, R., Haaland, S., & Lane, J. (2020). Convection in the Magnetosphere-Ionosphere System: A Multimission Survey of Its Response to IMF By Reversals. Journal of Geophysical Research: Space Physics, 125(10): e2019JA027541. doi:10.1029/2019JA027541.

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Genre: Journal Article
Other : Convection in the Magnetosphere‐Ionosphere System: A Multimission Survey of Its Response to IMF By Reversals

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 Creators:
Case, N.A., Author
Grocott, A., Author
Fear, R.C., Author
Haaland, Stein1, Author              
Lane, J.H., Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: Past studies have demonstrated that the interplanetary magnetic field (IMF) By component introduces asymmetries in the magnetosphere‐ionosphere (M‐I) system, though the exact timings involved are still unclear with two distinct mechanisms proposed. In this study, we statistically analyze convective flows from three regions of the M‐I system: the magnetospheric lobes, the plasma sheet, and the ionosphere. We perform superposed epoch analyses on the convective flows in response to reversals in the IMF By orientation, to determine the flow response timescales of these regions. We find that the lobes respond quickly and reconfigure to the new IMF By state within 30–40 min. The plasma sheet flows, however, do not show a clear response to the IMF By reversal, at least within 4 hr postreversal. The ionospheric data, measured by the Super Dual Auroral Radar Network (SuperDARN), match their counterpart magnetospheric flows, with clear and prompt responses at ≥75° magnetic latitude (MLAT) but a less pronounced response at 60–70 MLAT. We discuss the potential implication of these results on the mechanisms for introducing the IMF By component into the M‐I system.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2019JA027541
 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: 125 (10) Sequence Number: e2019JA027541 Start / End Page: - Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264