中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
Magnetic mapping effects of substorm currents leading to auroral poleward expansion and equatorward retreat

文献类型：期刊论文

作者Chu, Xiangning1; McPherron, Robert L.1; Hsu, Tung-Shin1; Angelopoulos, Vassilis1; Pu, Zuyin2; Yao, Zhonghua3; Zhang, Hui4; Connors, Martin5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2015
卷号120期号:1页码:253-265
关键词substorm current wedge auroral poleward expansion mapping magnetic dipolarization
ISSN号2169-9380
DOI10.1002/2014JA020596
文献子类Article
英文摘要Magnetotail fast flows, magnetic field dipolarization, and its relaxation are linked to auroral brightening, poleward expansion, and equatorward motion during substorm onset, expansion, and recovery, respectively. While auroral brightening is often attributed to the field-aligned currents produced by flow vorticity and pressure redistribution, the physical causes of auroral poleward expansion and equatorward retreat are not fully understood. Simplistically, such latitudinal changes can be directly associated to the tailward motion of the flux pileup region and the earthward flux transport toward the dayside that depletes the near-Earth plasma sheet. However, because the equatorial magnetic field profile and the magnetospheric field-aligned current system change significantly, mapping is severely distorted. To investigate this distortion, we superimpose a substorm current wedge model (dynamically driven by ground-based observations) on the global Tsyganenko model T96 during an isolated substorm on 13 February 2008, observed by the Time History of Events and Macroscale Interactions during Substorms and GOES 10 spacecraft and by ground all-sky imagers. We validate our model by showing that the timing and ionospheric projection of the flux pileup region and flow bursts observed at the spacecraft match auroral activations. We then use the improved mapping enabled by the model to demonstrate that in this event, auroral poleward expansion and equatorward retreat are mainly caused by substorm-current-wedge-induced mapping changes.
WOS关键词CURRENT WEDGE ; MAGNETOSPHERIC SUBSTORMS ; GROWTH-PHASE ; DIPOLARIZATION FRONTS ; MODEL ; FIELD ; TAIL ; SIGNATURES ; ONSET
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000349891300016
出版者AMER GEOPHYSICAL UNION
资助机构NSF(AGS-1003854) ; NSF(AGS-1003854) ; UK Science and Technology Facilities Council(ST/L005638/1) ; UK Science and Technology Facilities Council(ST/L005638/1) ; Space Weather grant(ATM 02-08501) ; Space Weather grant(ATM 02-08501) ; GEM grant(ATM 02-1798) ; GEM grant(ATM 02-1798) ; NSF(AGS-1003854) ; NSF(AGS-1003854) ; UK Science and Technology Facilities Council(ST/L005638/1) ; UK Science and Technology Facilities Council(ST/L005638/1) ; Space Weather grant(ATM 02-08501) ; Space Weather grant(ATM 02-08501) ; GEM grant(ATM 02-1798) ; GEM grant(ATM 02-1798) ; NSF(AGS-1003854) ; NSF(AGS-1003854) ; UK Science and Technology Facilities Council(ST/L005638/1) ; UK Science and Technology Facilities Council(ST/L005638/1) ; Space Weather grant(ATM 02-08501) ; Space Weather grant(ATM 02-08501) ; GEM grant(ATM 02-1798) ; GEM grant(ATM 02-1798) ; NSF(AGS-1003854) ; NSF(AGS-1003854) ; UK Science and Technology Facilities Council(ST/L005638/1) ; UK Science and Technology Facilities Council(ST/L005638/1) ; Space Weather grant(ATM 02-08501) ; Space Weather grant(ATM 02-08501) ; GEM grant(ATM 02-1798) ; GEM grant(ATM 02-1798)
源URL[http://ir.iggcas.ac.cn/handle/132A11/86806]  
专题中国科学院地质与地球物理研究所
通讯作者Chu, Xiangning
作者单位1.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA
2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
3.UCL, Mullard Space Sci Lab, Dorking, Surrey, England
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
5.Athabasca Univ, Geophys Observ, Athabasca, AB, Canada
推荐引用方式
GB/T 7714		 Chu, Xiangning,McPherron, Robert L.,Hsu, Tung-Shin,et al. Magnetic mapping effects of substorm currents leading to auroral poleward expansion and equatorward retreat[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2015,120(1):253-265.
APA Chu, Xiangning.,McPherron, Robert L..,Hsu, Tung-Shin.,Angelopoulos, Vassilis.,Pu, Zuyin.,...&Connors, Martin.(2015).Magnetic mapping effects of substorm currents leading to auroral poleward expansion and equatorward retreat.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,120(1),253-265.
MLA Chu, Xiangning,et al."Magnetic mapping effects of substorm currents leading to auroral poleward expansion and equatorward retreat".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 120.1(2015):253-265.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。