| DOI: | 10.1002/grl.50199
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| 论文题名: | Bursty magnetic reconnection at Saturn's magnetopause |
| 作者: | Badman S.V.; Masters A.; Hasegawa H.; Fujimoto M.; Radioti A.; Grodent D.; Sergis N.; Dougherty M.K.; Coates A.J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9208
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| EISSN: | 1944-8939
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| 出版年: | 2013
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| 卷: | 40, 期:6 | | 起始页码: | 1027
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| 结束页码: | 1031
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| 语种: | 英语
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| 英文关键词: | aurora
; reconnection
; Saturn
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| Scopus关键词: | aurora
; Field strengths
; Magnetic reconnections
; Magnetopause crossings
; Magnetosheaths
; reconnection
; Saturn
; Wind-driven flows
; Bifurcation (mathematics)
; Boundary layers
; Magnetopause
; Solar wind
; Magnetoplasma
; aurora
; electron
; in situ test
; latitude
; magnetic property
; magnetopause
; Saturn
|
| 英文摘要: | We infer the evolution of magnetopause reconnection from simultaneous in situ magnetopause crossings and auroral observations by Cassini on 19 July 2008. Depending on the magnetosheath field, it proceeds from (i) the high-latitude lobe, producing a cusp spot in the aurora, to (ii) lower latitude but north of Cassini, evidenced by an enhancement of the pre-noon auroral arc and escape of magnetospheric electrons during a long boundary layer traversal, to (iii) bursts of reconnection south of Cassini, resulting in bifurcations of the near-noon auroral oval, escape of magnetospheric electrons, and a short boundary layer encounter. The conditions under which the auroral bifurcations associated with this bursty reconnection were observed were examined for this and three other examples. The magnetosphere was strongly compressed with a high magnetosheath field strength in every case. We conclude that reconnection can proceed at different locations on the magnetopause, depending on the local magnetic shear and plasma β conditions, and bursty reconnection occurs when the magnetosphere is strongly compressed and can result in significant solar wind-driven flux transport in Saturn's outer magnetosphere. Key Points Bursty reconnection occurs when the magnetosphere is strongly compressed A dependence on plasma beta and magnetic shear is also evident Significant solar wind-driven flows will be present under these conditions. ©2013 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876928646&doi=10.1002%2fgrl.50199&partnerID=40&md5=11da58542ac558a018a9250b8ac6b3f4
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6472
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| Appears in Collections: | 气候减缓与适应
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作者单位: | JAXA Institute of Space and Astronautical Science, Japan
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| Recommended Citation: | |
Badman S.V.,Masters A.,Hasegawa H.,et al. Bursty magnetic reconnection at Saturn's magnetopause[J]. Geophysical Research Letters,2013-01-01,40(6).
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