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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
An explanation of auroral intensification during the substorm expansion phase

文献类型：期刊论文

作者Yao, Zhonghua1,2; Rae, I. J.1; Lui, A. T. Y.3; Murphy, K. R.4; Owen, C. J.1; Pu, Z. Y.5; Forsyth, C.1; Grodent, D.2; Zong, Q. -G.5; Du, A. M.6
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2017-08-01
卷号122期号:8页码:8560-8576
关键词substorm field-aligned current plasma sheet aurora magnetotail
ISSN号2169-9380
DOI10.1002/2017JA024029
文献子类Article
英文摘要A multiple auroral onset substorm on 28 March 2010 provides an opportunity to understand the physical mechanism in generating auroral intensifications during a substorm expansion phase. Conjugate observations of magnetic fields and plasma from the Time History of Events and Macroscale Interactions during Substorms (THEMIS) spacecraft, of field-aligned currents (FACs) from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) satellites, and from ground-based magnetometers and aurora are all available. The comprehensive measurements allow us to further our understanding of the complicated causalities among dipolarization, FAC generation, particle acceleration, and auroral intensification. During the substorm expansion phase, the plasma sheet expanded and was perturbed leading to the generation of a slow mode wave, which modulated electron flux in the outer plasma sheet. During this current sheet expansion, field-aligned currents formed, and geomagnetic perturbations were simultaneously detected by ground-based instruments. However, a magnetic dipolarization did not occur until about 3min later in the outer plasma sheet observed by THEMIS-A spacecraft (THA). We believe that this dipolarization led to an efficient Fermi acceleration to electrons and consequently the cause of a significant auroral intensification during the expansion phase as observed by the All-Sky Imagers (ASIs). This Fermi acceleration mechanism operating efficiently in the outer plasma sheet during the expansion phase could be a common explanation of the poleward auroral development after substorm onset. These results also show a good agreement between the upward FAC derived from AMPERE measurements and the auroral brightening observed by the ASIs.
WOS关键词NEAR-EARTH TAIL ; MULTIPLE-ONSET SUBSTORMS ; PLASMA SHEET ; MAGNETIC-FIELD ; PSEUDO-BREAKUP ; FLOW BURSTS ; MAGNETOSPHERIC SUBSTORM ; DIPOLARIZATION FRONTS ; PARTICLE-ACCELERATION ; THEMIS OBSERVATIONS
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000411788800048
出版者AMER GEOPHYSICAL UNION
资助机构NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; Canadian Space Agency ; NSF of GIMNAST(AGS-1004736) ; UK Science and Technology Facilities Council (STFC) at UCL/MSSL(ST/L005638/1) ; STFC(ST/L000563/1) ; National Environmental Research Council (NERC)(NE/L007495/1) ; NERC(NE/L007495/1) ; NSFC(41525016 ; European Union ; 41404117) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; Canadian Space Agency ; NSF of GIMNAST(AGS-1004736) ; UK Science and Technology Facilities Council (STFC) at UCL/MSSL(ST/L005638/1) ; STFC(ST/L000563/1) ; National Environmental Research Council (NERC)(NE/L007495/1) ; NERC(NE/L007495/1) ; NSFC(41525016 ; European Union ; 41404117) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; Canadian Space Agency ; NSF of GIMNAST(AGS-1004736) ; UK Science and Technology Facilities Council (STFC) at UCL/MSSL(ST/L005638/1) ; STFC(ST/L000563/1) ; National Environmental Research Council (NERC)(NE/L007495/1) ; NERC(NE/L007495/1) ; NSFC(41525016 ; European Union ; 41404117) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; Canadian Space Agency ; NSF of GIMNAST(AGS-1004736) ; UK Science and Technology Facilities Council (STFC) at UCL/MSSL(ST/L005638/1) ; STFC(ST/L000563/1) ; National Environmental Research Council (NERC)(NE/L007495/1) ; NERC(NE/L007495/1) ; NSFC(41525016 ; European Union ; 41404117)
源URL[http://ir.iggcas.ac.cn/handle/132A11/61968]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Yao, Zhonghua
作者单位1.Univ Coll London, Mullard Space Sci Lab, Dorking, Surrey, England
2.Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium
3.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA
4.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
5.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Yao, Zhonghua,Rae, I. J.,Lui, A. T. Y.,et al. An explanation of auroral intensification during the substorm expansion phase[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(8):8560-8576.
APA Yao, Zhonghua.,Rae, I. J..,Lui, A. T. Y..,Murphy, K. R..,Owen, C. J..,...&Kalmoni, N. M. E..(2017).An explanation of auroral intensification during the substorm expansion phase.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(8),8560-8576.
MLA Yao, Zhonghua,et al."An explanation of auroral intensification during the substorm expansion phase".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.8(2017):8560-8576.

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来源：地质与地球物理研究所

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