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Seasonal dependence of the vertical distributions of auroral kilometric radiation sources and auroral particle acceleration regions observed by the Akebono satellite
https://doi.org/10.15094/00006329
https://doi.org/10.15094/000063293dd62f85-bf54-45e2-9179-1da41186af91
名前 / ファイル | ライセンス | アクション |
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KJ00000048069 (1.3 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2001-09-01 | |||||
タイトル | ||||||
タイトル | Seasonal dependence of the vertical distributions of auroral kilometric radiation sources and auroral particle acceleration regions observed by the Akebono satellite | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00006329 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Kumamoto , Atsushi
× Kumamoto , Atsushi× Ono, Takayuki× Oya, Hiroshi |
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著者所属(英) | ||||||
en | ||||||
Department of Geophysics, Graduate School of Science, Tohoku University/Department of Geophysics, Graduate School of Science, Tohoku University/Fukui University of Technology | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Seasonal variations in the vertical distributions of occurrence probabilities of auroral kilometnc radiation (AKR) sources and auroral acceleration regions indicated by upward-flowing ion (UFI) events were compared based on statistical analyses of plasma waves and energetic particles data observed by the Akebono satellite. The peak altitude in the vertical distribution of occurrence probability of AKR sources whose emission intensities were larger than -150dBW/m^2-Hz occurred at 5000-6000 km in the summer polar region and at 3000-4000 km in the winter polar region. The analyses have also clarified that the vertical distributions of occurrence probabilities of auroral acceleration regions also show seasonal variations that are quite similar to those of the AKR sources. Based on the observation that intense AKR emissions can be generated even in high-density plasma, we suggest that processes other than cyclotron maser instability (CMI), such as mode conversions, may be dominant under conditions of dense ambient plasma in the summer polar regions. The contri-bution of the emissions generated by these mechanisms to the seasonal variations in the vertical distributions of AKR sources is thought to be significant. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11397422 | |||||
書誌情報 |
Advances in polar upper atmosphere research 巻 15, p. 32-42, 発行日 2001-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |