DOI: 10.1002/2016GL068013
论文题名: Storm time dynamics of ring current protons: Implications for the long-term energy budget in the inner magnetosphere
作者: Gkioulidou M. ; Ukhorskiy A.Y. ; Mitchell D.G. ; Lanzerotti L.J.
刊名: Geophysical Research Letters
ISSN: 0094-9617
EISSN: 1944-9348
出版年: 2016
卷: 43, 期: 10 起始页码: 4736
结束页码: 4744
语种: 英语
英文关键词: energy budget
; geomagnetic storms
; inner magnetosphere
; ring current
Scopus关键词: Geomagnetism
; Indexing (of information)
; Magnetosphere
; Population statistics
; Storms
; Energy budgets
; Geomagnetic storm
; High energy proton
; High-energy components
; Inner magnetosphere
; Low-energy components
; Pressure evolution
; Ring currents
; Budget control
; correlation
; current ring
; electron
; energy budget
; geomagnetic storm
; long-term change
; magnetosphere
; timescale
英文摘要: Our investigation of the long-term ring current proton pressure evolution in Earth's inner magnetosphere based on Van Allen Probes data shows drastically different behavior of the low- and high- energy components of the ring current proton population with respect to the SYM-H index variation. We found that while the low-energy component of the protons (<80 keV) is strongly governed by convective timescales and is very well correlated with the absolute value of SYM-H index, the high-energy component (>100 keV) varies on much longer timescales and shows either no correlation or anticorrelation with the absolute value of SYM-H index. Our study also shows that the contributions of the low- and high- energy protons to the inner magnetosphere energy content are comparable. Thus, our results conclusively demonstrate that proton dynamics, and as a result the energy budget in the inner magnetosphere, do not vary strictly on storm time timescales as those are defined by the SYM-H index. ©2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971283905&doi=10.1002%2f2016GL068013&partnerID=40&md5=460c68f248cee30e71b269e580268093
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10580
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: Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States
Recommended Citation:
Gkioulidou M.,Ukhorskiy A.Y.,Mitchell D.G.,et al. Storm time dynamics of ring current protons: Implications for the long-term energy budget in the inner magnetosphere[J]. Geophysical Research Letters,2016-01-01,43(10).