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  1. F300 宇宙地球環境研究所
  2. F300a 雑誌掲載論文
  3. 学術雑誌

Stepwise tailward retreat ofmagnetic reconnection: THEMIS observations of an auroral substorm

http://hdl.handle.net/2237/25179
http://hdl.handle.net/2237/25179
65d6506f-ee5d-431c-904a-11942280acf8
名前 / ファイル ライセンス アクション
Ieda_et_al-2016-Journal_of_Geophysical_Research_Space_Physics.pdf Ieda_et_al-2016-Journal_of_Geophysical_Research_Space_Physics.pdf (7.6 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2016-12-12
タイトル
タイトル Stepwise tailward retreat ofmagnetic reconnection: THEMIS observations of an auroral substorm
言語 en
著者 Ieda, A.

× Ieda, A.

WEKO 67941

en Ieda, A.

Search repository
Nishimura, Y.

× Nishimura, Y.

WEKO 67942

en Nishimura, Y.

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Miyashita, Y.

× Miyashita, Y.

WEKO 67943

en Miyashita, Y.

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Angelopoulos, V.

× Angelopoulos, V.

WEKO 67944

en Angelopoulos, V.

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Runov, A.

× Runov, A.

WEKO 67945

en Runov, A.

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Nagai, T.

× Nagai, T.

WEKO 67946

en Nagai, T.

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Frey, H. U.

× Frey, H. U.

WEKO 67947

en Frey, H. U.

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Fairfield, D. H.

× Fairfield, D. H.

WEKO 67948

en Fairfield, D. H.

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Slavin, A.

× Slavin, A.

WEKO 67949

en Slavin, A.

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Vanhamäki, H.

× Vanhamäki, H.

WEKO 67950

en Vanhamäki, H.

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Uchino, H.

× Uchino, H.

WEKO 67951

en Uchino, 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 © 2016 American Geophysical Union
抄録
内容記述 Auroral stepwise poleward expansions were clarified by investigating a multiple-onset substorm that occurred on 27 February 2009. Five successive auroral brightenings were identified in all-sky images, occurring at approximately 10 min intervals. The first brightening was a faint precursor. The second brightening had a wide longitude; thus, it represented the Akasofu substorm onset. Other brightenings expanded poleward; thus, they were interpreted to be auroral breakups. These breakups occurred stepwise; that is, later breakups were initiated at higher latitudes. Corresponding reconnection signatures were studied using Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellite observations between 8 and 24 RE down the magnetotail. The Akasofu substorm onset was not accompanied by a clear reconnection signature in the tail. In contrast, the three subsequent auroral breakups occurred simultaneously (within a few minutes) with three successive fast flows at 24 RE; thus, these were interpreted to be associated with impulsive reconnection episodes. These three fast flows consisted of a tailward flow and two subsequent earthward flows. The flow reversal at the second breakup indicated that a tailward retreat of the near-Earth reconnection site occurred during the substorm expansion phase. In addition, the earthward flow at the third breakup was consistent with the classic tailward retreat near the end of the expansion phase; therefore, the tailward retreat is likely to have occurred in a stepwise manner. We interpreted the stepwise characteristics of the tailward retreat and poleward expansion to be potentially associated by a stepwise magnetic flux pileup.
言語 en
内容記述タイプ Abstract
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/10.1002/2015JA022244
ISSN
収録物識別子タイプ EISSN
収録物識別子 2169-9402
書誌情報 en : JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS

巻 121, 号 5, p. 4548-4568, 発行日 2016-05-28
著者版フラグ
値 publisher
URI
識別子 http://doi.org/10.1002/2015JA022244
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/25179
識別子タイプ HDL
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