| 研究課題/領域番号 |
22KF0167
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| 補助金の研究課題番号 |
22F22022 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分17010:宇宙惑星科学関連
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| 研究機関 | 名古屋大学 |
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研究代表者 |
三好 由純 (2023) 名古屋大学, 宇宙地球環境研究所, 教授 (10377781)
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| 研究分担者 |
PORUNAKATU SHREEDEVI 名古屋大学, 宇宙地球環境研究所, 外国人特別研究員
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| 受入研究者 |
三好 由純 (2022) 名古屋大学, 宇宙地球環境研究所, 教授 (10377781)
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| 外国人特別研究員 |
PORUNAKATU SHREEDEVI 名古屋大学, 宇宙地球環境研究所, 外国人特別研究員
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| 研究期間 (年度) |
2023-03-08 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,300千円 (直接経費: 2,300千円)
2023年度: 1,100千円 (直接経費: 1,100千円)
2022年度: 1,200千円 (直接経費: 1,200千円)
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| キーワード | simulation / inner magnetosphere / ring current / plasma waves |
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| 研究開始時の研究の概要 |
This research work focuses on understanding the mechanisms responsible for the auroral ion precipitation and its ionospheric effects using both global modeling and observations.
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| 研究実績の概要 |
RAM-SCB simulations were conducted to understand the impact of proton precipitation caused by wave-particle interactions on the ionospheric dynamics during geomagnetic stormtime. The simulations show that localized proton precipitation resulting from EMIC waves resulted in localized enhancement of conductivity in the evening side. This further gave rise to high speed westward flow in the ionosphere similar to the Subauroral Polarization Streams (SAPS). The study further highlights the importance of proton precipitation in modulating the ionospheric dynamics. Additionally, the sources and mechanisms of generation of EMIC waves in the inner magnetosphere during periods of solar wind dynamic pressure enhancement and their subsequent impact on the ionosphere are studied using the satellite/ground measurements.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
We encountered some challenges while integrating WPI into the standalone RAM-SCB. We will continue our data-model comparison as soon as we resolve the issues with the integration of WPI in the model. We're in the process of preparing a manuscript for the simulation study on SAPS.
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| 今後の研究の推進方策 |
The results of the simulation study conducted to understand the impact of proton precipitation on the ionospheric dynamics will be submitted to Geophysical Research Letters. The results will also be presented in the upcoming conferences (AGU, SGEPSS).
As for the second study on the mechanisms of generation of EMIC waves in the inner magnetosphere during periods of solar wind dynamic pressure enhancement and their subsequent impact on the ionosphere, the data analysis is complete. The simulation results from the model will be compared with the satellite and ground-based measurements.
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