A comparison between vertical winds in the lower thermosphere and magnetic field perturbations on the ground
スポンサーリンク
概要
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Vertical winds in the lower thermosphere are estimated from OI557.7-nm Doppler shifts obtained with a Fabry-Perot interferometer at the Poker Flat Research Range (65.12N, 147.43W in geographic coordinate), Alaska. The temporal variation of vertical winds was compared with the horizontal component of the magnetic field obtained at Poker Flat and two other sites, Gakona (62.12N, 145.14W) and Fort Yukon (66.36N, 145.22W). Two nights of observations were examined and the results were shown here. The results showed that temporal variations of vertical winds were similar to that of magnetic field variation during each substorm. In some cases the results of cross correlation between these two parameters showed that the magnetic field perturbation leads vertical winds in the earlier period of the substorm. The difference increased gradually and reached a maximum at around the center of the recovery phase. From there, the differences decreased. The mechanism for the relation between the two parameters is still unclear, but this result suggests an intimate relation between ionospheric currents and vertical wind in the thermosphere.
- 国立極地研究所の論文
著者
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Conde Mark
Geophysical Institute, University of Alaska Fairbanks
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SMITH Roger
Geophysical Institute, University of Alaska Fairbanks
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Conde Mark
Geophysical Institute University Of Alaska
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Smith Roger
Geophysical Institute University Of Alaska Fairbanks
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Smith Roger
Geophysical Institute University Of Alaska
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Ishii Mamoru
Communications Research Laboratory Independent Administrative Institution
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Krynicki Matthew
Geophysical Institute, University of Alaska Fairbanks
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Sagawa Eiichi
Communications Research Laboratory, Ministry of Posts and Telecommunications, Koganei
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Ishii Mamoru
Communications Research Laboratory
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Sagawa Eiichi
Communications Research Laboratory Ministry Of Posts And Telecommunications Koganei
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Sagawa Eiichi
Communication Research Laboratory
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Krynicki Matthew
Geophysical Institute University Of Alaska Fairbanks
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Watari Shin'ichi
Communications Research Laboratory Ministry Of Posts And Telecommunications Koganei
関連論文
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- アラスカにおける中間圏・熱圏大気変動の観測
- A comparison between vertical winds in the lower thermosphere and magnetic field perturbations on the ground
- アラスカ・ポーカーフラットで観測された熱圏中性鉛直風の変動
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