DOI: 10.1002/2013GL058789
论文题名: A new class of complex ejecta resulting from the interaction of two CMEs and its expected geoeffectiveness
作者: Lugaz N. ; Farrugia C.J.
刊名: Geophysical Research Letters
ISSN: 0094-10380
EISSN: 1944-10111
出版年: 2014
卷: 41, 期: 3 起始页码: 769
结束页码: 776
语种: 英语
英文关键词: coronal mass ejection
; MHD
; Sun
Scopus关键词: Magnetohydrodynamics
; Magnetosphere
; Sun
; Coronal mass ejection
; Geoeffectiveness
; Geomagnetic storm
; In-situ measurement
; Magnetic clouds
; Magnetic field vectors
; Smooth rotation
; Transient events
; Geomagnetism
; geomagnetic storm
; in situ measurement
; magnetic field
; magnetic property
; magnetosphere
; measurement method
; numerical model
英文摘要: A significant portion of transients measured by spacecraft at 1 AU does not show the well-defined properties of magnetic clouds (MCs). Here we propose a new class of complex, non-MC ejecta resulting from the interaction of two coronal mass ejections (CMEs) with different orientations, which differ from previously studied multiple-MC events. At 1 AU, they are associated with a smooth rotation of the magnetic field vector over an extended duration and do not exhibit clear signs of interaction. We determine the characteristics of such events based on a numerical simulation and identify and analyze a potential case in the long-duration transient event measured in situ on 19-22 March 2001. Such events may result in intense, long-duration geomagnetic storms, with a sequence sawtooth events, and may sometimes be misidentified as isolated CMEs. Key Points Long-duration isolated-like ejecta at 1 AU may result from multiple CMEs Such events may drive the magnetosphere for long periods with sawtooth events In-situ measurements may be misleading and propagation must be accounted for © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893641046&doi=10.1002%2f2013GL058789&partnerID=40&md5=670c489eb091f25810243dbbf70f4813
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7644
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics and Space Science Center, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Lugaz N.,Farrugia C.J.. A new class of complex ejecta resulting from the interaction of two CMEs and its expected geoeffectiveness[J]. Geophysical Research Letters,2014-01-01,41(3).