2014 Fiscal Year Final Research Report
Study of thermospheric wind variation during pulsating aurora
| Project/Area Number |
24540478
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | オーロラ / 熱圏 / 電離圏 / 磁気圏 / 光学観測 |
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| Outline of Final Research Achievements |
We investigated polar thermospheric wind variations during pulsating aurora with focus on recovery phase of the auroral substorm. For many years, it had been considered that amount of the energy dissipation at the recovery phase was too small to generate wind variations in the polar thermosphere. However, our observational activities with high-sensitive optical instruments at Tromsø, Norway found larger amplitudes than the predicted by the present theory. Analysis using data since January 2009 showed that the wind variations had a tendency to appear in the darker area and the edge of the auroral patch at the recovery phase.
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| Free Research Field |
超高層物理学
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