2013 Fiscal Year Final Research Report
Studies of atmosphere and ionosphere coupling using a general circulation model and global geomagnetic observation data
| Project/Area Number |
23540513
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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 |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Kyushu University |
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Principal Investigator |
MIYAHARA Saburo 九州大学, 理学(系)研究科(研究院), 名誉教授 (70037282)
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| Co-Investigator(Kenkyū-buntansha) |
YUMOTO Kiyofumi 九州大学, 国際宇宙天気科学・教育センター, 教授 (20125686)
HIROOKA Toshihiko 九州大学, 理学(系)研究科(研究院), 教授 (90253393)
KAWANO Hideaki 九州大学, 国際宇宙天気科学・教育センター, 准教授 (60304721)
LIU Xuixin 九州大学, 国際宇宙天気科学・教育センター, 准教授 (70589639)
WATANABE Masakazu 九州大学, 国際宇宙天気科学・教育センター, 准教授 (70446607)
YOSHIKAWA Akimasa 九州大学, 国際宇宙天気科学・教育センター, 講師 (70284479)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 中性大気変動 / 電離圏電流変動 / 赤道エレクトロジェット / Sq / 大気潮汐波 / 成層圏突然昇温 |
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| Research Abstract |
Relations between neutral atmosphere and ionosphere variations are investigated using Kyushu-GCM and global geomagnetic observation system developed by Kyushu University.
It is found that ionospheric current system varies after Stratospheric Sudden Warming(SSW) due to the neutral atmospheric variations mainly caused by variations of semidiurnal tide after the SSW. It is also found that the neutral atmosphere temperature in the lower ionosphere suddenly falls down after the SSW. This phenomena is also caused by the variations of semidiurnal tide after the SSW. Effects of ultra fast Kelvin wave(UFK) variations on the ionospheric currents system is confined in the equatorial to low latitude regions, but the variations by UFK is less than 25% of the variations caused by other neutral atmospheric variations such as tidal variations.
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