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DOI | 10.1002/2016GL071680 |
Observations of multiharmonic ion cyclotron waves due to inverse ion cyclotron damping in the northern magnetospheric cusp | |
Slapak, R.1; Gunell, H.2; Hamrin, M.3 | |
2017 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Belgium |
英文摘要 | We present a case study of inverse ion cyclotron damping taking place in the northern terrestrial magnetospheric cusp, exciting waves at the ion cyclotron frequency and its harmonics. The ion cyclotron waves are primarily seen as peaks in the magnetic-field spectral densities. The corresponding peaks in the electric-field spectral densities are not as profound, suggesting a background electric field noise or other processes of wave generation causing the electric spectral densities to smoothen out more compared to the magnetic counterpart. The required condition for inverse ion cyclotron damping is a velocity shear in the magnetic field-aligned ion bulk flow, and this condition is often naturally met for magnetosheath influx in the northern magnetospheric cusp, just as in the presented case. We note that some ion cyclotron wave activity is present in a few similar shear events in the southern cusp, which indicates that other mechanisms generating ion cyclotron waves may also be present during such conditions. |
英文关键词 | inverse ion cyclotron damping plasma wave generation cusp |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393954900003 |
WOS关键词 | HIGH-ALTITUDE CUSP ; KELVIN-HELMHOLTZ INSTABILITY ; MAGNETIC-FIELD ; PLASMA-WAVES ; POLAR CUSP ; CLUSTER OBSERVATIONS ; ELECTRIC-FIELD ; SOLAR-WIND ; OUTFLOW ; MANTLE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28811 |
专题 | 气候变化 |
作者单位 | 1.Lulea Univ Technol, Div Space Technol, Kiruna, Sweden; 2.Belgian Inst Space Aeron, Brussels, Belgium; 3.Umea Univ, Dept Phys, Umea, Sweden |
推荐引用方式 GB/T 7714 | Slapak, R.,Gunell, H.,Hamrin, M.. Observations of multiharmonic ion cyclotron waves due to inverse ion cyclotron damping in the northern magnetospheric cusp[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(1). |
APA | Slapak, R.,Gunell, H.,&Hamrin, M..(2017).Observations of multiharmonic ion cyclotron waves due to inverse ion cyclotron damping in the northern magnetospheric cusp.GEOPHYSICAL RESEARCH LETTERS,44(1). |
MLA | Slapak, R.,et al."Observations of multiharmonic ion cyclotron waves due to inverse ion cyclotron damping in the northern magnetospheric cusp".GEOPHYSICAL RESEARCH LETTERS 44.1(2017). |
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