Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1998-07-01 |
タイトル |
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言語 |
en |
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タイトル |
Neutral atmosphere dynamics in the E- and F-regions from Fabry-Perot Doppler imaging observations |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
著者名(英) |
Kubota, Minoru
Okano, Shoichi
Fukunishi, Hiroshi
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著者所属(英) |
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en |
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Communications Research Laboratory |
著者所属(英) |
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en |
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National Institute of Poler Research |
著者所属(英) |
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en |
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Department of Geophysics, Faculty of Science, Tohoku University |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
In order to investigate a response of the thermospheric neutral winds to the auroral activity, we developed a Fabry-Perot Doppler Imaging System (FPDIS) which measures Doppler shifts and widths of aurora and/or airglow emission lines of OI557.7nm and OI630.0nm over a wide field of view (165°) to obtain twodimensional patterns of winds and temperatures in the E-and F-regions. We carried out the FPDIS observations at Syowa Station (69.00°S, 39.58°E), Antarctica over 57 nights covering the various auroral conditions in 1994. In this paper, we discuss the following results obtained from our observations : (1) We found that nighttime variations in the thermospheric neutral winds depend on geomagnetic activity. Magnetically southward winds during geomagnetically active periods were stronger than during quiet periods, and the difference in the wind velocities was largest around midnight. This difference is supposed to be associated with auroral energy injection and the relative location between the auroral oval and Syowa Station. (2) Periodic enhancements in meridional winds, which were classified into middle-scale atmospheric gravity waves (AGWs), were observed on the night of 3-4 June 1994 during geomagnetically active periods. These wind enhancements appeared to be generated in the auroral oval which remained at a few hundred kilometers north of Syowa Station. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 52,
p. 55-67,
発行日 1998-07
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