2012 Fiscal Year Final Research Report
Role of electromagnetic coupling between mid-latitude ionosphere and inner magnetosphere during geomagnetic disturbances.
| 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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| 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 |
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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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[Journal Article] Magnetic local time and latitude dependence of amplitude of the main impulse (MI) of geomagnetic sudden commencements and its seasonal variation2012
Author(s)
Shinbori, A., Y. Tsuji, T. Kikuchi, T.Araki, A. Ikeda, T. Uozumi, D. Baishev, B. M. Shevtsov, T. Nagatsuma, and K. Yumoto
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Journal Title
J. Geophys. Res
Volume: 117
Pages: A08322
DOI
Peer Reviewed
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[Presentation] Pi2の極赤道電流系2011
Author(s)
菊池崇,橋本久美子,西村幸敏,新堀淳樹,長妻努,門倉昭,佐藤夏雄
Organizer
日本惑星科学連合大会
Place of Presentation
幕張メッセ(千葉県)
Year and Date
2011-05-27
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