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  1. B100 理学部/理学研究科
  2. B100a 雑誌掲載論文
  3. 学術雑誌

Feedback and Ballooning Instabilities in the Magnetosphere‐Ionosphere Coupling

http://hdl.handle.net/2237/00033210
http://hdl.handle.net/2237/00033210
1c2e052a-5620-4fa5-b1ff-4e424b0a8129
名前 / ファイル ライセンス アクション
2020GL088233.pdf 2020GL088233 (9.1 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-12-17
タイトル
タイトル Feedback and Ballooning Instabilities in the Magnetosphere‐Ionosphere Coupling
言語 en
著者 Watanabe, T.‐H.

× Watanabe, T.‐H.

WEKO 102597

en Watanabe, T.‐H.

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 © 2020 American Geophysical Union
キーワード
主題Scheme Other
主題 magnetosphere
キーワード
主題Scheme Other
主題 ionosphere
キーワード
主題Scheme Other
主題 Alfven waves
キーワード
主題Scheme Other
主題 ballooning instability
キーワード
主題Scheme Other
主題 aurora
抄録
内容記述 A unified model for the feedback and ballooning instabilities in the magnetosphere‐ionosphere (M‐I) coupling is developed by means of the reduced magnetohydrodynamic and two‐fluid equations, involving the local current closure and the ionospheric conductivity change in a scale of auroral fine structures, self‐consistently. In a low pressure gradient case, the Alfvén harmonics are destabilized through the feedback mechanism, while the ballooning instability appears if the magnetospheric pressure gradient exceeds a critical value. Transition of the dominant instability between the feedback and ballooning modes is brought by change of the normalized pressure gradient or the convection electric field in the magnetosphere. The obtained results imply a variety of appearance of auroral arcs and beads in the M‐I coupling system.
言語 en
内容記述タイプ Abstract
内容記述
内容記述 ファイル公開:2020-12-28
言語 ja
内容記述タイプ Other
出版者
言語 en
出版者 Wiley
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1029/2020GL088233
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0094-8276
書誌情報 en : Geophysical Research Letters

巻 47, 号 12, p. e2020GL088233, 発行日 2020-06-28
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