Characteristics of magnetospheric energetics during geomagnetic storms

doi:10.1029/2012JA017584

	Characteristics of magnetospheric energetics during geomagnetic storms
	Li, H.1,2; Wang, C.1; Xu, W. Y.3; Kan, J. R.1,4
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2012-04-28
卷号	117
ISSN号	0148-0227
DOI	10.1029/2012JA017584
文献子类	Article
英文摘要	To investigate the magnetospheric energetics during magnetic storms, we performed a statistical survey of 307 geomagnetic storms between 1995 and 2009. For the purpose of getting a detailed understanding of the energy processes, we conducted our study of storm-time energetics for three time durations: the main phase, the recovery phase, and the total storm period. We found that the partition of the energy dissipation via the ring current injection and high-latitude ionospheric dissipation is controlled by the storm intensity. The proportion of the ring current injection increases linearly as the storm intensity increases for all three time durations. For moderate storms, the high-latitude ionospheric dissipation is dominant, with only similar to 30% energy dissipated via the ring current; whereas for superstorms, the ring current injection becomes dominant, with similar to 70% energy dissipated via the ring current. We also confirmed the essential and crucial role of the total energy input into the magnetosphere during the main phase in controlling the storm intensity. The total energy input during the main phase is directly proportional to the storm intensity. Their correlation efficiency is as high as 0.85. The storm-time energy budget was also quantified in this study. The coupling efficiency indicates an exponential decay as the storm intensity increases, with the coupling efficiency during the main phase less than that during the recovery phase.
WOS关键词	SOLAR-WIND ; MAGNETIC STORMS ; RING CURRENT ; ENERGY DEPOSITION ; INDEXES ; FIELD ; PARAMETERS ; INJECTION ; SUBSTORMS ; DYNAMICS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000303314200009
资助机构	973 program(2012CB825602) ; 973 program(2012CB825602) ; NNSFC(40921063 ; NNSFC(40921063 ; Specialized Research Fund for State Key Laboratories of China ; Specialized Research Fund for State Key Laboratories of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; 40831060) ; 40831060) ; 973 program(2012CB825602) ; 973 program(2012CB825602) ; NNSFC(40921063 ; NNSFC(40921063 ; Specialized Research Fund for State Key Laboratories of China ; Specialized Research Fund for State Key Laboratories of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; 40831060) ; 40831060) ; 973 program(2012CB825602) ; 973 program(2012CB825602) ; NNSFC(40921063 ; NNSFC(40921063 ; Specialized Research Fund for State Key Laboratories of China ; Specialized Research Fund for State Key Laboratories of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; 40831060) ; 40831060) ; 973 program(2012CB825602) ; 973 program(2012CB825602) ; NNSFC(40921063 ; NNSFC(40921063 ; Specialized Research Fund for State Key Laboratories of China ; Specialized Research Fund for State Key Laboratories of China ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; Key Laboratory of Geospace Environment, Chinese Academy of Sciences ; 40831060) ; 40831060)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84276]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, H.
作者单位	1.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China 2.Univ Sci & Technol China, Chinese Acad Sci, Key Lab Geospace Environm, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 4.Univ Alaska Fairbanks, Geophys Inst, Fairbanks, AK USA
推荐引用方式 GB/T 7714	Li, H.,Wang, C.,Xu, W. Y.,et al. Characteristics of magnetospheric energetics during geomagnetic storms[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117.
APA	Li, H.,Wang, C.,Xu, W. Y.,&Kan, J. R..(2012).Characteristics of magnetospheric energetics during geomagnetic storms.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117.
MLA	Li, H.,et al."Characteristics of magnetospheric energetics during geomagnetic storms".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012).