DOI: 10.1002/2014GL060604
论文题名: Electric currents of a substorm current wedge on 24 February 2010
作者: Connors M. ; McPherron R.L. ; Anderson B.J. ; Korth H. ; Russell C.T. ; Chu X.
刊名: Geophysical Research Letters
ISSN: 0094-9989
EISSN: 1944-9720
出版年: 2014
卷: 41, 期: 13 起始页码: 4449
结束页码: 4455
语种: 英语
英文关键词: AMPERE
; current wedge
; magnetic inversion
; substorms
Scopus关键词: Ionosphere
; Magnetosphere
; AMPERE
; Ground magnetic data
; magnetic inversion
; Magnetic perturbation
; Planetary electrodynamics
; Quantitative parameters
; Quantitative study
; Substorms
; Electric currents
英文摘要: The three-dimensional "substorm current wedge" (SCW) was postulated by McPherron et al. (1973) to explain substorm magnetic perturbations. The origin and coherence as a physical system of this important paradigm of modern space physics remained unclear, however, with progress hindered by gross undersampling, and uniqueness problems in data inversion. Complementing AMPERE (Active Magnetosphere and Planetary Electrodynamics Response Experiment) space-derived radial electric currents with ground magnetic data allowing us to determine currents from the ionosphere up, we overcome problems of uniqueness identified by Fukushima (1969, 1994). For a substorm on 24 February 2010, we quantify SCW development consistently from ground and space data. Its westward electrojet carries 0.5 MA in the more poleward part of the auroral oval, in Region 1 (R1) sense spanning midnight. The evening sector electrojet also feeds into its upward current. We thus validate the SCW concept and obtain parameters needed for quantitative study of substorms. Key Points Auroral zone electric currents should be determined from both ground and space The substorm current wedge to first order represents substorm currents well Magnetic inversions can give useful quantitative parameters of the current wedge ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904087194&doi=10.1002%2f2014GL060604&partnerID=40&md5=1b0e896534068007125746ad2a7e7964
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7253
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Athabasca University, Edmonton AB, Canada
Recommended Citation:
Connors M.,McPherron R.L.,Anderson B.J.,et al. Electric currents of a substorm current wedge on 24 February 2010[J]. Geophysical Research Letters,2014-01-01,41(13).