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DOI | 10.1029/2019GL082292 |
Statistical Occurrence and Distribution of High-Amplitude Whistler Mode Waves in the Outer Radiation Belt | |
Tyler, E.1; Breneman, A.1; Cattell, C.1; Wygant, J.1; Thaller, S.1; Malaspina, D.2 | |
2019-03-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:5页码:2328-2336 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We present the first statistical analysis with continuous data coverage and nonaveraged amplitudes of the prevalence and distribution of high-amplitude (>5mV/m) whistler mode waves in the outer radiation belt using 5years of Van Allen Probes data. These waves are most common above L=3.5 and between magnetic local time of 0-7 where they are present1-4% of the time. During high geomagnetic activity, high-amplitude whistler mode wave occurrence rises above 30% in some regions. During these active times the plasmasphere erodes to lower L and high-amplitude waves are observed at all L outside of it, with the highest occurrence at low L (3.5-4) in the predawn sector. These results have important implications for modeling radiation belt particle interactions with chorus, as large-amplitude waves interact nonlinearly with electrons. Results also may provide clues regarding the mechanisms which result in growth to large amplitudes. Plain Language Summary Our Earth is surrounded by a ring of high-energy electrons, known as the outer radiation belt, which can cause damage to satellites in orbit. These electrons gain such high energy because of a type of electromagnetic waves called whistler waves, which exist in the space around Earth. Satellites have recently discovered whistler waves that are tens or hundreds of times as large as the average waves. Such large whistler waves can energize electrons very quickly and also cause electrons to be knocked into our atmosphere, creating aurora. Because these large waves are hard to measure, scientists have not been able to say how often they occur, where they occur, or even how exactly they form. This study uses a unique data set gathered by the Van Allen Probes to find out when and where these very large whistler waves occur. We found that these waves appear mostly in the nightside and morning side of the Earth, and they tend to appear much closer to Earth than smaller whistler waves do. This information offers us clues about how these monster waves form and what impact they might have on the radiation belt and the Earth. |
英文关键词 | radiation belt whistler waves chorus Van Allen belt |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000462612900001 |
WOS关键词 | VAN ALLEN PROBES ; PULSATING AURORA ; CHORUS WAVES ; ACCELERATION ; SCATTERING ; ELECTRONS ; DEPENDENCE |
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/181591 |
专题 | 气候变化 |
作者单位 | 1.Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA; 2.Univ Colorado Boulder, Lab Atmospher & Space Phys, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Tyler, E.,Breneman, A.,Cattell, C.,et al. Statistical Occurrence and Distribution of High-Amplitude Whistler Mode Waves in the Outer Radiation Belt[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(5):2328-2336. |
APA | Tyler, E.,Breneman, A.,Cattell, C.,Wygant, J.,Thaller, S.,&Malaspina, D..(2019).Statistical Occurrence and Distribution of High-Amplitude Whistler Mode Waves in the Outer Radiation Belt.GEOPHYSICAL RESEARCH LETTERS,46(5),2328-2336. |
MLA | Tyler, E.,et al."Statistical Occurrence and Distribution of High-Amplitude Whistler Mode Waves in the Outer Radiation Belt".GEOPHYSICAL RESEARCH LETTERS 46.5(2019):2328-2336. |
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