2010 Fiscal Year Final Research Report
Analysis of the effect of ionospheric convection on auroral breakup
| Project/Area Number |
20740282
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
HOSOKAWA Keisuke The University of Electro-Communications, 大学院・情報理工学研究科, 助教 (80361830)
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| Project Period (FY) |
2008 – 2010
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| Keywords | オーロラ / 極冠域プラズマパッチ / 人工衛星-地上共同観測 / サブストーム |
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| Research Abstract |
By using polar cap patches detected by an all-sky camera as a tracer, I investigated how the polar cap convection changes near substorm onsets. I found an interesting event in which the motion of polar cap patches drastically changed a few minutes prior to the substorm onset. This suggests an occurrence of enhanced plasma flows across the plasma sheet boundary layer before onsets. That is, magnetic reconnection at the near-Earth plasma sheet takes place before onsets and plays an important role in triggering substorms.
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