| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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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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