DOI: 10.1002/2016GL070878
论文题名: The complex nature of storm-time ion dynamics: Transport and local acceleration
作者: Denton M.H. ; Reeves G.E. ; Thomsen M.F. ; Henderson M.G. ; Friedel R.H.W. ; Larsen B. ; Skoug R.M. ; Funsten H.O. ; Spence H.E. ; Kletzing C.A.
刊名: Geophysical Research Letters
ISSN: 0094-8523
EISSN: 1944-8254
出版年: 2016
卷: 43, 期: 19 起始页码: 10059
结束页码: 10067
语种: 英语
英文关键词: plasma sheet
Scopus关键词: Free energy
; Ionosphere
; Magnetosphere
; Plasma sheaths
; Population statistics
; Complex nature
; Energy dependent
; Ionospheric plasmas
; Isolated regions
; Magnetic local time
; Particle tracing
; Plasma sheet
; Spatial structure
; Heavy ions
英文摘要: Data from the Van Allen Probes Helium, Oxygen, Proton, and Electron (HOPE) spectrometers reveal hitherto unresolved spatial structure and dynamics in ion populations. Complex regions of O+ dominance, at energies from a few eV to >10 keV, are observed throughout the magnetosphere. Isolated regions on the dayside that are rich in energetic O+ might easily be interpreted as strong energization of ionospheric plasma. We demonstrate, however, that both the energy spectrum and the limited magnetic local time extent of these features can be explained by energy-dependent drift of particles injected on the nightside 24 h earlier. Particle tracing simulations show that the energetic O+ can originate in the magnetotail, not in the ionosphere. Enhanced wave activity is colocated with the heavy ion-rich plasma, and we further conclude that the waves were not a source of free energy for accelerating ionospheric plasma but rather the consequence of the arrival of substorm-injected plasma. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992446644&doi=10.1002%2f2016GL070878&partnerID=40&md5=498a54f835980ad2bbc5ffb48d0c7042
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9486
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: New Mexico Consortium, Los Alamos, NM, United States
Recommended Citation:
Denton M.H.,Reeves G.E.,Thomsen M.F.,et al. The complex nature of storm-time ion dynamics: Transport and local acceleration[J]. Geophysical Research Letters,2016-01-01,43(19).