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DOI | 10.1029/2019GL083115 |
Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt | |
Hanzelka, Miroslav1,2; Santolik, Ondrej1,2 | |
2019-06-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:11页码:5735-5745 |
文章类型 | Article |
语种 | 英语 |
国家 | Czech Republic |
英文摘要 | Previously published statistics based on Cluster spacecraft measurements surprisingly show that in the outer radiation belt, lower band whistler mode waves predominantly propagate unattenuated parallel to the magnetic field lines up to midlatitudes, where ray tracing simulations indicated highly attenuated waves with oblique wave vectors. We explain this behavior by considering a large fraction of ducted waves. We argue that these ducts can be weak and thin enough to be difficult to detect by spacecraft instrumentation while being strong enough to guide whistler mode waves in a cold plasma ray tracing simulation. After adding a tenuous hot electron population, we obtain a strong effect of Landau damping on unducted waves, while the ducted waves experience less damping or even growth. Consequently, the weighted average of amplitudes and wave normal angles of a mixture of ducted and unducted waves provides us with strong quasi-parallel waves, consistent with the observations. |
英文关键词 | whistler mode ray tracing chorus magnetospheric ducts Poynting flux radiation belts |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477616200012 |
WOS关键词 | VAN ALLEN PROBES ; LARGE-AMPLITUDE ; GENERATION ; DENSITY ; ELECTRONS ; EMISSIONS ; PLASMASPHERE ; PROPAGATION ; PLASMAPAUSE ; CLUSTER |
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/184076 |
专题 | 气候变化 |
作者单位 | 1.Czech Acad Sci, Inst Atmospher Phys, Dept Space Phys, Prague, Czech Republic; 2.Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic |
推荐引用方式 GB/T 7714 | Hanzelka, Miroslav,Santolik, Ondrej. Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(11):5735-5745. |
APA | Hanzelka, Miroslav,&Santolik, Ondrej.(2019).Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt.GEOPHYSICAL RESEARCH LETTERS,46(11),5735-5745. |
MLA | Hanzelka, Miroslav,et al."Effects of Ducting on Whistler Mode Chorus or Exohiss in the Outer Radiation Belt".GEOPHYSICAL RESEARCH LETTERS 46.11(2019):5735-5745. |
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