| DOI: | 10.1002/2014GL062116
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| 论文题名: | Heating of the plasma sheet by broadband electromagnetic waves |
| 作者: | Chaston C.C.; Bonnell J.W.; Salem C.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9534
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| EISSN: | 1944-9265
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| 出版年: | 2014
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| 卷: | 41, 期:23 | | 起始页码: | 8185
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| 结束页码: | 8192
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| 语种: | 英语
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| 英文关键词: | fast flows
; flow braking
; ion heating
; kinetic Alfven waves
; plasma interchange
; plasma sheet
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| Scopus关键词: | Electromagnetic fields
; Electromagnetic waves
; Plasma heating
; Adiabatic invariants
; Broadband electromagnetic waves
; Fast flows
; Ion Heating
; Kinetic alfven waves
; Low frequency electromagnetic field
; Plasma sheet
; Standard deviation
; Plasma sheaths
; adiabatic process
; electromagnetic wave
; estimation method
; frequency analysis
; gravity field
; heating
; plasma
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| 英文摘要: | We demonstrate that broadband low-frequency electromagnetic field fluctuations embedded within fast flows throughout the Earth's plasma sheet may drive significant ion heating. This heating is nearly entirely in the direction perpendicular to the background magnetic field and is estimated to occur at an average rate of ∼1 eV/s with rates in excess of 10 eV/s within one standard deviation of the average value over all observed events. For an Earthward flow the total change in temperature along a flow path may exceed one keV and for "wave-rich" flows can be comparable to that expected due to conservation of the first adiabatic invariant. The consequent increase in plasma pressure and flux tube entropy may lead to braking of inward motion and the suppression of plasma interchange. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921568363&doi=10.1002%2f2014GL062116&partnerID=40&md5=07327653bc0e48af6a95f0e4e24e872c
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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/6798
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| Appears in Collections: | 气候减缓与适应
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作者单位: | School of Physics, University of SydneyNSW, Australia
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| Recommended Citation: | |
Chaston C.C.,Bonnell J.W.,Salem C.. Heating of the plasma sheet by broadband electromagnetic waves[J]. Geophysical Research Letters,2014-01-01,41(23).
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