DOI: 10.1002/2015GL066674
论文题名: Extreme ionospheric ion energization and electron heating in Alfvén waves in the storm time inner magnetosphere
作者: Chaston C.C. ; Bonnell J.W. ; Wygant J.R. ; Kletzing C.A. ; Reeves G.D. ; Gerrard A. ; Lanzerotti L. ; Smith C.W.
刊名: Geophysical Research Letters
ISSN: 0094-8285
EISSN: 1944-8016
出版年: 2015
卷: 42, 期: 24 起始页码: 10531
结束页码: 10540
语种: 英语
英文关键词: Alfven waves
; electron precipitation
; geomagnetic storms
; ion acceleration
; ion outflow
; ion upflow
Scopus关键词: Electromagnetic fields
; Electrons
; Geomagnetism
; Magnetosphere
; Storms
; Alfven waves
; Electron precipitation
; Geomagnetic storm
; Ion accelerations
; Ion outflow
; Ions
; current ring
; Doppler effect
; electromagnetic field
; electron
; energy flux
; equatorial dynamics
; frequency analysis
; geomagnetic storm
; heating
; ion exchange
; ionosphere
; magnetohydrodynamics
; magnetosphere
; particle motion
; precipitation (chemistry)
; spacecraft
; wave spectrum
英文摘要: We report measurements of energized outflowing/bouncing ionospheric ions and heated electrons in the inner magnetosphere during a geomagnetic storm. The ions arrive in the equatorial plane with pitch angles that increase with energy over a range from tens of eV to > 50 keV while the electrons are field aligned up to ~1 keV. These particle distributions are observed during intervals of broadband low-frequency electromagnetic field fluctuations consistent with a Doppler-shifted spectrum of kinetic Alfvén waves and kinetic field line resonances. The fluctuations extend from L ≈ 3 out to the apogee of the Van Allen Probes spacecraft at L ≈ 6.5. They thereby span most of the L shell range occupied by the ring current. These measurements suggest a model for ionospheric ion outflow and energization driven by dispersive Alfvén waves that may account for the large storm time contribution of ionospheric ions to magnetospheric energy density. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955189583&doi=10.1002%2f2015GL066674&partnerID=40&md5=f82bfe511ded9c2223b88d66ad197de8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7901
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: Space Sciences Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Chaston C.C.,Bonnell J.W.,Wygant J.R.,et al. Extreme ionospheric ion energization and electron heating in Alfvén waves in the storm time inner magnetosphere[J]. Geophysical Research Letters,2015-01-01,42(24).