| DOI: | 10.1002/2014GL061253
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| 论文题名: | A ULF wave driver of ring current energization |
| 作者: | Murphy K.R.; Mann I.R.; Ozeke L.G.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9739
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| EISSN: | 1944-9470
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| 出版年: | 2014
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| 卷: | 41, 期:19 | | 起始页码: | 6595
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| 结束页码: | 6602
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| 语种: | 英语
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| 英文关键词: | Dst
; radial diffusion
; ring current dynamics
; ULF waves
; wave particle interactions
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| Scopus关键词: | Diffusion
; Radiation belts
; Wave power
; Dst
; Radial diffusion
; Ring currents
; ULF waves
; Wave-particle interactions
; Ions
; correlation
; electromagnetic wave
; estimation method
; magnetic field
; radial flow
; timescale
; transport process
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| 英文摘要: | ULF wave radial diffusion plays an important role in the transport of energetic electrons in the outer radiation belt, yet similar ring current transport is seldom considered even though ions satisfy a nearly identical drift resonance condition albeit without the relativistic correction. By examining the correlation between ULF wave power and the response of the ring current, characterized by Dst, we demonstrate a definite correlation between ULF wave power and Dst. Significantly, the lagged correlation peaks such that ULF waves precede the response of the ring current and Dst. We suggest that this correlation is the result of enhanced radial transport and energization of ring current ions through drift resonance and ULF wave radial diffusion of ring current ions. An analysis and comparison of the ion and electron diffusion coefficients further support this conclusion, ULF waves providing an important missing physical transport process explaining Dst underestimation in ring current models. Key Points ULF waves have an important yet usually neglected role in ring current dynamicsULF wave ion transport occurs on similar timescales as that of electronsImportant ring current ion ULF wave transport effects must be included in models ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911398980&doi=10.1002%2f2014GL061253&partnerID=40&md5=ec7fe19fdebcb71d0a73a52ce4e3adf1
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7003
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| Appears in Collections: | 气候减缓与适应
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作者单位: | NASA GSFC, Greenbelt, MD, United States
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| Recommended Citation: | |
Murphy K.R.,Mann I.R.,Ozeke L.G.. A ULF wave driver of ring current energization[J]. Geophysical Research Letters,2014-01-01,41(19).
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