| Project/Area Number |
22540461
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Space and upper atmospheric physics
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| Research Institution | Kibi International University (2011-2012)
Kyushu University of Health and Welfare (2010) |
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Principal Investigator |
HASHIMOTO Kumiko 吉備国際大学, 国際環境経営学部環境経営学科, 教授 (00389008)
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| Co-Investigator(Kenkyū-buntansha) |
KIKUCHI Takashi 名古屋大学, 名誉教授 (70358977)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 磁気嵐 / サブストーム / 磁気圏対流 / 過遮蔽電場 / 領域II型沿磁力線電流 / 中緯度 電離圏 / 対流電場 / 赤道カウンタージェット電流 / 領域2型沿磁力線電流 / 領域1型沿磁力線電流 |
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| Research Abstract |
We showed that the overshielding electric field develops together with the convection electric field during the substorm expansion phase by using data from global magnetometer networks and SuperDARN radars. Based on the HF Doppler measurements, the overshielding electric field at mid latitude was found to be 2 mV/m, comparable tothe storm time convection electric field. Our results suggest that the overshielding electric field plays an important role in the geomagnetic and ionospheric disturbances at mid-equatorial latitudes and would contribute to the growth/decay of magnetospheric disturbances.
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