[M-GI37] 情報地球惑星科学と大量データ処理

[MGI37-23] グローバルMHDシミュレーションの可視化と大規模データ解析による磁気圏-電離圏結合モデルのパラメータ感受性の検証

*才田 聡子¹、藤田 茂²、門倉 昭³、田中 高史⁴、行松 彰³、田中 良昌³、大谷 晋一⁵、村田 健史⁶、樋口 知之⁷ (1.北九州工業高等専門学校、2.気象庁気象大学校、3.国立極地研究所、4.九州大学・国際宇宙天気科学・教育センター、5.ジョンズホプキンス大学応用物理研究所、6.情報通信研究機構、7.統計数理研究所)

キーワード：グローバルMHDシミュレーション, 感度解析, 電離圏電位分布, オーロラ, 電離層電気伝導度, 沿磁力線電流

The Magnetosphere-Ionosphere (M-I) boundary condition in the global MHD simulation (Tanaka, 2010) includes insufficient factors for the M-I coupling process, so that we have to calibrate the global MHD simulation model considering parametric uncertainty in the M-I coupling process.
For statistical analysis and visualization, case studies have been done for the global MHD simulation.
We need computational techniques to analyze simulated and observed data simultaneously. However, the amount of simulation data with high spatial and temporal resolution is very large.
Therefore in this study, we compare the ionospheric E x B plasma drift obtained from the global MHD simulation and that obtained from the SuperDARN HF Radar Network.
The simulated plasma drift are not always reproducible under a southward interplanetary magnetic (IMF) condition.
In today's presentation, we show latest results of a parameteric study of the global MHD simulation and demonstrate the evaluation of the reliability and validity of M-I coupling process in the global MHD Simulation.

References:
Tanaka, T., A. Nakamizo, A. Yoshikawa, S. Fujita, H. Shinagawa, H. Shimazu, T. Kikuchi, and K. K. Hashimoto (2010), Substorm convection and current system deduced from the global simulation, J. Geophys. Res., 115, A05220, doi:10.1029/2009JA014676