DOI: 10.1002/2016GL068818
论文题名: Cone angle control of the interaction of magnetic clouds with the Earth's bow shock
作者: Turc L. ; Escoubet C.P. ; Fontaine D. ; Kilpua E.K.J. ; Enestam S.
刊名: Geophysical Research Letters
ISSN: 0094-9542
EISSN: 1944-9273
出版年: 2016
卷: 43, 期: 10 起始页码: 4781
结束页码: 4789
语种: 英语
英文关键词: bow shock
; geoeffectivity
; magnetic clouds
; magnetosheath
; space weather
Scopus关键词: Geomagnetism
; Magnetic fields
; Plasma shock waves
; Bow shocks
; Geoeffectivity
; Magnetic clouds
; Magnetosheaths
; Space weather
; Magnetism
英文摘要: We study the interaction of magnetic clouds (MCs) with the near-Earth environment. Recent works suggest that the bow shock crossing may modify significantly the magnetic structure of an MC, and thus its ability to drive geomagnetic storms. This change is largely controlled by the bow shock configuration, which depends on the upstream interplanetary magnetic field (IMF) orientation. From the distribution of the magnetic field orientation in 152 Earth-impacting MCs, we determine for the first time the typical shock configuration during MC events. We find that 56% (6.3%) of the time, the subsolar bow shock configuration is exclusively quasi-perpendicular (quasi-parallel). The rest of the time, both configurations coexist. Furthermore, using a subset of 63 MCs observed simultaneously in the solar wind and in the dayside magnetosheath, we determine the magnitude of the magnetic field alteration, how it depends on the shock configuration, and how it relates to the IMF cone angle. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971249974&doi=10.1002%2f2016GL068818&partnerID=40&md5=3321b9c3c03093d4eb122d77eb65fdf8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10505
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Scientific Support Office, Directorate of Science, European Space Research and Technology Centre (ESA/ESTEC), Noordwijk, Netherlands
Recommended Citation:
Turc L.,Escoubet C.P.,Fontaine D.,et al. Cone angle control of the interaction of magnetic clouds with the Earth's bow shock[J]. Geophysical Research Letters,2016-01-01,43(10).