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DOI | 10.1029/2018GL079264 |
The Influence of Io's 2015 Volcanic Activity on Jupiter's Magnetospheric Dynamics | |
Yoshioka, K.1; Tsuchiya, F.2; Kagitani, M.2; Kimura, T.3; Murakami, G.4; Fukuyama, D.5; Yamazaki, A.4; Yoshikawa, I.1; Fujimoto, M.4,6 | |
2018-10-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:19页码:10193-10199 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Embedded deep inside the huge magnetosphere of Jupiter, the moon Io has active volcanos. Jovian magnetospheric dynamics are driven by the expulsion of Iogenic plasma in the strongly magnetized, fast-rotating system and should vary in response to Io's volcanic activity. In early 2015 when various observations indicated an increase in volcanic activity, the EXCEED instrument onboard the Hisaki spacecraft continuously observed the Jovian magnetosphere via the aurora emission and the emission from the Io plasma torus. The plasma diagnosis of the enhanced Io plasma torus spectrum along with a physical chemistry model for deducing plasma parameters revealed a higher plasma density and a 2-4 times faster radial flow as compared with a volcanically quiet period. Aurora emissions reflecting midmagnetospheric activities showed multiple highly elevated brightness peaks about a month later. Long-term and continuous monitoring by Hisaki enabled the first comprehensive observations of the Jovian magnetosphere in response to Io's enhanced volcanic activity. Plain Language Summary This article, based on the high-resolution and continuous extreme ultraviolet spectroscopic data taken by the Japanese Hisaki satellite, shows that the plasma dynamics in the Jovian magnetosphere is highly influenced by Io's volcanic activity. The observations were made continuously from the beginning to end of a volcanic event. Through the detailed analysis of the spectra around Io's orbit and the Jovian aurora, and by fitting the data to a physical chemistry model, this first comprehensive study concludes that the plasma transport within the magnetosphere is enhanced by a factor of 2-4 by Io's volcanic activity. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000448656800020 |
WOS关键词 | JOVIAN INNER MAGNETOSPHERE ; PLASMA TORUS ; CASSINI ERA ; CIRCULATION ; SATELLITE ; VOYAGER |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28156 |
专题 | 气候变化 |
作者单位 | 1.Univ Tokyo, Dept Complex Sci & Engn, Kashiwa, Chiba, Japan; 2.Tohoku Univ, Grad Sch Sci, Planetary Plasma & Atmospher Res Ctr, Sendai, Miyagi, Japan; 3.Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai, Miyagi, Japan; 4.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan; 5.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo, Japan; 6.Tokyo Inst Technol, Earth Life Sci Inst, Tokyo, Japan |
推荐引用方式 GB/T 7714 | Yoshioka, K.,Tsuchiya, F.,Kagitani, M.,et al. The Influence of Io's 2015 Volcanic Activity on Jupiter's Magnetospheric Dynamics[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(19):10193-10199. |
APA | Yoshioka, K..,Tsuchiya, F..,Kagitani, M..,Kimura, T..,Murakami, G..,...&Fujimoto, M..(2018).The Influence of Io's 2015 Volcanic Activity on Jupiter's Magnetospheric Dynamics.GEOPHYSICAL RESEARCH LETTERS,45(19),10193-10199. |
MLA | Yoshioka, K.,et al."The Influence of Io's 2015 Volcanic Activity on Jupiter's Magnetospheric Dynamics".GEOPHYSICAL RESEARCH LETTERS 45.19(2018):10193-10199. |
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