globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA025029
Scopus记录号: 2-s2.0-85043526135
论文题名:
Response of Jupiter's Aurora to Plasma Mass Loading Rate Monitored by the Hisaki Satellite During Volcanic Eruptions at Io
作者: Kimura T.; Hiraki Y.; Tao C.; Tsuchiya F.; Delamere P.A.; Yoshioka K.; Murakami G.; Yamazaki A.; Kita H.; Badman S.V.; Fukazawa K.; Yoshikawa I.; Fujimoto M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:3
起始页码: 1885
结束页码: 1899
语种: 英语
英文关键词: aurora ; Io ; Jupiter ; plasma ; transport ; volcano
英文摘要: The production and transport of plasma mass are essential processes in the dynamics of planetary magnetospheres. At Jupiter, it is hypothesized that Io's volcanic plasma carried out of the plasma torus is transported radially outward in the rotating magnetosphere and is recurrently ejected as plasmoid via tail reconnection. The plasmoid ejection is likely associated with particle energization, radial plasma flow, and transient auroral emissions. However, it has not been demonstrated that plasmoid ejection is sensitive to mass loading because of the lack of simultaneous observations of both processes. We report the response of plasmoid ejection to mass loading during large volcanic eruptions at Io in 2015. Response of the transient aurora to the mass loading rate was investigated based on a combination of Hisaki satellite monitoring and a newly developed analytic model. We found that the transient aurora frequently recurred at a 2–6 day period in response to a mass loading increase from 0.3 to 0.5 t/s. In general, the recurrence of the transient aurora was not significantly correlated with the solar wind, although there was an exceptional event with a maximum emission power of ~10 TW after the solar wind shock arrival. The recurrence of plasmoid ejection requires the precondition that an amount comparable to the total mass of magnetosphere, ~1.5 Mt, is accumulated in the magnetosphere. A plasmoid mass of more than 0.1 Mt is necessary in case that the plasmoid ejection is the only process for mass release. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114303
Appears in Collections:气候减缓与适应

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作者单位: Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama, Japan; Advanced Knowledge Laboratory, Inc., Shinjuku, Japan; National Institute of Information and Communications Technology, Tokyo, Japan; Planetary Plasma and Atmospheric Research Center, Tohoku University, Sendai, Japan; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Department of Complexity Science and Engineering, University of Tokyo, Kashiwa, Japan; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan; Department of Physics, Lancaster University, Lancaster, United Kingdom; Academic Center for Computing and Media Studies, Kyoto University, Kyoto, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan

Recommended Citation:
Kimura T.,Hiraki Y.,Tao C.,et al. Response of Jupiter's Aurora to Plasma Mass Loading Rate Monitored by the Hisaki Satellite During Volcanic Eruptions at Io[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)
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