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Interaction of a localized shear Alfven wave with the anisotropic conducting ionosphere: Behaviour in a near-source region
https://nipr.repo.nii.ac.jp/records/1594
https://nipr.repo.nii.ac.jp/records/159478eefc1e-484d-451c-9e0f-712dca0e8294
名前 / ファイル | ライセンス | アクション |
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KJ00000012227 (1.8 MB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1984-07-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Interaction of a localized shear Alfven wave with the anisotropic conducting ionosphere: Behaviour in a near-source region | |||||
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 | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Fujita,Shigeru
× Fujita,Shigeru× Tamao,Tsutomu |
|||||
著者所属(英) | ||||||
en | ||||||
Kakioka Magnetic Observatory/Geophysics Research Laboratory, University of Tokyo | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | We present results of detailed numerical analysis of effects of the nonuniform, anisotropic conducting ionosphere on the localized shear Alfven wave, in assocation with the origin of pc-1 geomagnetic pulsations observed on the ground in high latitudes. Employing a simple four-layer model that consists of the evanescent magnetosphere for the fast magnetosonic wave, the ducting upper ionosphere, the E-layer with anisotropic conductivities, and the metallic earth, we obtain numerical solutions representing the behaviour of surface magnetic variations in a near-source region. The rate of spatial attenuation of the induced magnetic intensity at the ground varies with a horizontal distance from the center of the source, taking the same order of magnitude as that of the incident wave in the source region, but it becomes a smaller value over radial distances of an outside region. This deviation is attributed to the effects of trapped fast mode waves in the upper ionosphere, which can propagate to horizontal direction crossing vertical magnetic field lines. The major axis of polarization of the horizontal magnetic vector on the ground is nearly perpendicular to that of the incident wave, while its ellipticity and sense of rotation are almost the same as those of the incident wave. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 31, p. 82-95, 発行日 1984-07 |