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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

Multievent Analysis of Oscillatory Motion of Medium‐Scale Traveling Ionospheric Disturbances Observed by a 630‐nm Airglow Imager Over Tromsø

http://hdl.handle.net/2237/00032617
61ec095e-05da-4cb2-a4ea-51fa8f3286a4
名前 / ファイル ライセンス アクション
2019JA027598.pdf 2019JA027598 (47.3 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-09-14
タイトル
タイトル Multievent Analysis of Oscillatory Motion of Medium‐Scale Traveling Ionospheric Disturbances Observed by a 630‐nm Airglow Imager Over Tromsø
著者 Yadav, Sneha

× Yadav, Sneha

WEKO 101159

Yadav, Sneha

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Shiokawa, K.

× Shiokawa, K.

WEKO 101160

Shiokawa, K.

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Oyama, S.

× Oyama, S.

WEKO 101161

Oyama, S.

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Otsuka, Y.

× Otsuka, Y.

WEKO 101162

Otsuka, Y.

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権利
権利情報 © 2020 American Geophysical Union
キーワード
主題Scheme Other
主題 MSTIDs
キーワード
主題Scheme Other
主題 airglow
キーワード
主題Scheme Other
主題 aurora
キーワード
主題Scheme Other
主題 high‐latitude ionosphere
抄録
内容記述 We present a comprehensive investigation on the propagation characteristics of duskside medium‐scale traveling ionospheric disturbances (MSTIDs) using 630.0‐nm airglow emissions over Tromsø (69.6°N, 19.2°E; magnetic latitude: 66.7°N). The unique points of our observation are (1) duskside MSTIDs primarily exhibited eastward motion under quiet conditions but turned to the westward direction associated with geomagnetic disturbances, (2) the westward moving MSTIDs again turned to the eastward direction when the geomagnetic disturbance ceased, (3) the turning of MSTIDs to the westward direction was invariably associated with an increase of the northward component of the magnetic field observed by the local ground‐based magnetometers and with the equatorward expansion of the auroral oval, and (4) the Super Dual Auroral Radar Network convection maps revealed that the location of Tromsø was inside (outside) the duskside convection cell during the time of appearance of westward (eastward) moving MSTIDs. The average eastward and westward velocities of MSTIDs were ~25–80 and ~40–140 m/s, respectively. The Doppler shift measurement of the 630‐nm airglow by a Fabry‐Perot interferometer at Tromsø showed that northeastward winds were predominant during the appearance of eastward moving MSTIDs. These experimental evidences suggest that the oscillatory motion of MSTIDs over high latitudes is driven by the convection electric field. The MSTIDs tend to move eastward under geomagnetically quiet conditions but show westward motion under the influence of convection electric field associated with auroral activities in the duskside of two‐cell convection pattern.
内容記述タイプ Abstract
出版者
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
DOI
関連識別子
識別子タイプ DOI
関連識別子 https://doi.org/10.1029/2019JA027598
ISSN(print)
収録物識別子タイプ ISSN
収録物識別子 2169-9380
書誌情報 Journal of Geophysical Research: Space Physics

巻 125, 号 3, p. e2019JA027598, 発行日 2020-03
著者版フラグ
値 publisher
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