DOI: 10.1002/2014GL059228
论文题名: Evidence for injection of relativistic electrons into the Earth's outer radiation belt via intense substorm electric fields
作者: Dai L. ; Wygant J.R. ; Cattell C.A. ; Thaller S. ; Kersten K. ; Breneman A. ; Tang X. ; Friedel R.H. ; Claudepierre S.G. ; Tao X.
刊名: Geophysical Research Letters
ISSN: 0094-10342
EISSN: 1944-10073
出版年: 2014
卷: 41, 期: 4 起始页码: 1133
结束页码: 1141
语种: 英语
英文关键词: radiation belt relativistic electrons
; substorm dipolarization
; substorm electric fields
; substorm injection
Scopus关键词: Electric fields
; Electrons
; Dipolarization
; Geosynchronous orbits
; MeV-Electrons
; Model results
; Outer radiation belt
; Relativistic electron
; Substorm injections
; Substorms
; Radiation belts
; belt
; electrical conductivity
; electrical method
; electron
; GOES
; measurement method
; numerical model
; radiation balance
英文摘要: Observation and model results accumulated in the last decade indicate that substorms can promptly inject relativistic 'killer' electrons (≥MeV) in addition to 10-100 keV subrelativistic populations. Using measurements from Cluster, Polar, LANL, and GOES satellites near the midnight sector, we show in two events that intense electric fields, as large as 20 mV/m, associated with substorm dipolarization are associated with injections of relativistic electrons into the outer radiation belt. Enhancements of hundreds of keV electrons at dipolarization in the magnetotail can account for the injected MeV electrons through earthward transport. These observations provide evidence that substorm electric fields inject relativistic electrons by transporting magnetotail electrons into the outer radiation belt. In these two events, injected relativistic electrons dominated the substorm timescale enhancement of MeV electrons as observed at geosynchronous orbit. Key Points Intense substorm electric fields inject relativistic electrons into radiation belts ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894232128&doi=10.1002%2f2014GL059228&partnerID=40&md5=4fde6e2cf1673d9aec7c87cd9cd7d913
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7606
Appears in Collections: 气候减缓与适应
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作者单位: School of Physics and Astronomy, University of Minnesota, Twin Cities, Minneapolis MN, United States
Recommended Citation:
Dai L.,Wygant J.R.,Cattell C.A.,et al. Evidence for injection of relativistic electrons into the Earth's outer radiation belt via intense substorm electric fields[J]. Geophysical Research Letters,2014-01-01,41(4).