Study of auroral current system using multi-satellite observations
| Project/Area Number |
16K05568
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Space and upper atmospheric physics
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
Ieda Akimasa 名古屋大学, 宇宙地球環境研究所, 助教 (70362209)
|
|---|
| Project Period (FY) |
2016-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
|---|
| Keywords | オーロラ爆発 / オーロラ電流系 / 磁気リコネクション / 電離圏電気伝導度 / 衝突周波数 / 酸素 / 電気伝導度 / 電荷交換衝突 / 国際情報交流（米国） / オーロラ / 電離圏 / 磁力線再結合 / 編隊衛星 |
|---|
| Outline of Final Research Achievements |
Aurora near the midnight polar ionosphere (100 km altitude) brightens explosively approximately every a few hours. This auroral breakup is supposed to represent an electrical short of the current flowing in the magnetotail (50-200 million meters) into the ionosphere. We studied auroral breakup using simultaneous ground-satellite observations. In particular, we clarified the reason why auroral breakup jumps to a higher latitude every 10 min. We also clarified the reason why auroral breakup looks different between ground observations and satellite observations.
|
| Academic Significance and Societal Importance of the Research Achievements |
オーロラは宇宙から降下する電子が地球の中性大気を励起することにより発生する。すなわち、オーロラ爆発は恒星大気と惑星大気が激しく相互作用していることを意味しており、オーロラ爆発を理解することは宇宙と地球の境界領域を理解することである。この近宇宙領域は国際宇宙ステーション（高度400 km）や気象衛星軌道(高度4万km)を含み、そこでの電磁気擾乱を理解することは人類の宇宙活動に貢献すると考えられる。
|
Report
(5 results)
Research Products
(20 results)
-
-
-
-
-
-
-
-
-
-
-
-
[Journal Article] Stepwise tailward retreat of magnetic reconnection: THEMIS observations of an auroral substorm2016
Author(s)
A. Ieda, Y. Nishimura, Y. Miyashita, V. Angelopoulos, A. Runov, T. Nagai, H. U. Frey, D. H. Fairfield, J. A. Slavin, H. Vanhamäki, H. Uchino, R. Fujii, Y. Miyoshi, and S. Machida
-
Journal Title
Journal of Geophysical Research Space Physics
Volume: 121
Issue: 5
Pages: 4548-4568
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
-
[Presentation] Auroral substorm onset in satellite-based global images and ground-based all-sky images2019
Author(s)
Akimasa Ieda, Kirsti Kauristie, Yukitoshi Nishimura, Yukinaga Miyashita, Harald U. Frey , Liisa Juusola, Daniel Whiter, Masahito Nose, Matthew O. Fillingim, Farideh Honary, Neil C. Rogers , Yoshizumi Miyoshi, Tsubasa Miura, Takahiro Kawashima and Shinobu Machida
Organizer
Japan geoscience union joint meeting 2019
Related Report
Int'l Joint Research
-
-
[Presentation] MMS衛星群とGeotail衛星によるサブストーム開始の同時観測2018
Author(s)
家田 章正, 北村 成寿, 齋藤 義文, 横田 勝一郎, Pollock Craig J., Giles Barbara L., Russell C. T., 町田 忍, 長井 嗣信, 熊本 篤志, 土屋 史紀, 笠原 禎也, 三好 由純
Organizer
第144回 SGEPSS総会および講演会
Related Report
-
-
[Presentation] Simultaneous observation of auroral substorm onset in Polar satellite global images and ground-based all-sky images2017
Author(s)
A. Ieda, K. Kauristie, L. Juusola, Y. Nishimura, Y. Miyashita, D. H. Fairfield, H. U. Frey, M. O. Fillingim, D. Whiter, F. Honary, N. C. Rogers, Y. Miyoshi, and S. Machida
Organizer
International conference on substorms 13
Related Report
Int'l Joint Research / Invited
-
-
[Presentation] MMS satellites and EISCAT radar observations of dayside flow bursts2016
Author(s)
A. Ieda, Y. Ogawa, S. Oyama, N. Kitamura, Y. Saito, S. Yokota, H. Hasegawa, S. Taguchi, K. Hosokawa, S. Machida, H. Uchino, T. Hori, C. J. Pollock, B. L. Giles, T. E. Moore, C. T. Russell, R. J. Strangeway, R. Nakamura, and J. L. Burch
Organizer
日本地球惑星科学連合2016年大会
Place of Presentation
幕張メッセ、千葉市
Related Report
Int'l Joint Research
-
