globalchange  > 科学计划与规划
DOI: 10.1002/2015GL064816
论文题名:
Pileup accident hypothesis of magnetic storm on 17 March 2015
作者: Kataoka R.; Shiota D.; Kilpua E.; Keika K.
刊名: Geophysical Research Letters
ISSN: 0094-9397
EISSN: 1944-9128
出版年: 2015
卷: 42, 期:13
起始页码: 5155
结束页码: 5161
语种: 英语
英文关键词: coronal hole ; coronal mass ejection ; corotating interaction region ; magnetic storm
Scopus关键词: Accidents ; Digital storage ; Geomagnetism ; Magnetic fields ; Magnetohydrodynamics ; Solar energy ; Solar system ; Solar wind ; Wind ; Adiabatic expansion ; Coronal hole ; Coronal mass ejection ; Corotating interaction regions ; Magnetic storms ; Planar magnetic structures ; Solar wind structures ; Strong magnetic fields ; Magnetism ; coronal mass ejection ; magnetic field ; magnetic survey ; magnetohydrodynamics ; solar cycle ; solar wind ; wind velocity
英文摘要: We propose a "pileup accident" hypothesis, based on the solar wind data analysis and magnetohydrodynamics modeling, to explain unexpectedly geoeffective solar wind structure which caused the largest magnetic storm so far during the solar cycle 24 on 17 March 2015: First, a fast coronal mass ejection with strong southward magnetic fields both in the sheath and in the ejecta was followed by a high-speed stream from a nearby coronal hole. This combination resulted in less adiabatic expansion than usual to keep the high speed, strong magnetic field, and high density within the coronal mass ejection. Second, preceding slow and high-density solar wind was piled up ahead of the coronal mass ejection just before the arrival at the Earth to further enhance its magnetic field and density. Finally, the enhanced solar wind speed, magnetic field, and density worked all together to drive the major magnetic storm. Key Points Piled-up coronal mass ejection caused unexpectedly large major magnetic storm High-speed stream from coronal hole prevents the expansion of the ejecta from the behind Planar magnetic structures were found in the highly compressed sheath region. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938099601&doi=10.1002%2f2015GL064816&partnerID=40&md5=8dd86b53df509a134536c30c1a645c60
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9012
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: National Institute of Polar Research, Tachikawa, Japan

Recommended Citation:
Kataoka R.,Shiota D.,Kilpua E.,et al. Pileup accident hypothesis of magnetic storm on 17 March 2015[J]. Geophysical Research Letters,2015-01-01,42(13).
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