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Observation of ionospheric Alfven resonance at a middle latitude station
https://doi.org/10.15094/00006381
https://doi.org/10.15094/000063815692d8d3-283c-4149-aa9a-9e95bfd4e9d5
名前 / ファイル | ライセンス | アクション |
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KJ00000729600 (769.1 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 2004-08-01 | |||||
タイトル | ||||||
タイトル | Observation of ionospheric Alfven resonance at a middle latitude station | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ionospheric Alfven resonator (IAR) | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ionosphere | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | magnetosphere | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | polarization | |||||
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 | 10.15094/00006381 | |||||
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) |
Hayakawa, Masashi
× Hayakawa, Masashi× Molchanov, Oleg A.× Schekotov, Alexander Yu.× Fedorov, Evgeny |
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著者所属(英) | ||||||
en | ||||||
University of Electro-Communications | ||||||
著者所属(英) | ||||||
en | ||||||
Institute of Physics of the Earth, Russian Academy of Science | ||||||
著者所属(英) | ||||||
en | ||||||
Institute of Physics of the Earth, Russian Academy of Science | ||||||
著者所属(英) | ||||||
en | ||||||
Institute of Physics of the Earth, Russian Academy of Science | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | This paper intends to report on the statistical results on the spectral resonance structures of the ionospheric Alfven resonances (IAR) in the ULF frequency range 0.1-5.0 Hz on the basis of the analysis of long-term data obtained from July 2000 to December 2002 (2.5 years) at the Karimshino station (Kamchatka, Russia) (L=2.1) by the conventional 3-component search-coil magnetometer. We analyze both the dynamic spectra of three components and polarization spectra in order to distinguish IAR from other possible noises. The average frequency difference _F between the adjacent maxima, intensity and occurrence rate of the IAR spectra have been estimated from the averaged spectra. Early papers at middle latitudes have been based on a small data base. Based on our first long-term observation at middle latitude, new findings, especially related to the seasonal variation, have emerged from this analysis. (1) There is an evident seasonal variation in the occurrence rate with a maximum in the September-January period and an almost complete absence of IAR structures in the spring-early summer time. (2) Occurrence maximum in the diurnal variation is found at 21-23 LT in the autumn and winter. Almost all the IAR structures are observed at local nighttime. (3) The averaged _F is found to be about 0.2-0.5 Hz in the autumn period but it seems to increase up to 0.5-0.7 Hz in winter. (4) The IAR occurrence rate is inversely correlated with the Kp index of global magnetic activity. (5) The intensity of D component exceeds essentially that of H component of the IAR structures in a majority of cases. Diurnal variations of resonance frequencies in the H and D components are not always identical. Finally the mechanisms to explain the observed characteristics of the IAR have been discussed. | |||||
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 18, p. 65-76, 発行日 2004-08 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |