Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL087203 |
Pitch Angle Structures of Ring Current Ions Induced by Evolving Poloidal Ultra-Low FrequencyWaves | |
Liu, Z-Y; Zong, Q-G; Zhou, X-Z; Zhu, Y-F; Gu, S-J | |
2020-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Ultra-low frequency (ULF) waves can effectively accelerate ring current ions through drift-bounce resonance. Conventional theories have been developed to understand this resonance since the dawn of the space age, which usually assume ULF waves are quasi-steady in time. However, ULF waves would experience growth and damping stages in the real magnetosphere, which requires an adjustment of the conventional theories. Here, we attempt to reveal how ions respond to evolving ULF waves. By analyzing an event observed by Van Allen Probe A and reproducing the observations via simulation, we find the phase shift of ion flux oscillation across resonant pitch angles varies with time, when wave growth and damping cannot be neglected. As a result, the inclination angle of stripes in pitch angle spectrogram varies with time, causing "fishbone-like" pitch angle structures. One should take into account such ion behaviors when considering the role of drift-bounce resonance in the real magnetosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529120100082 |
WOS关键词 | CHARGED-PARTICLE BEHAVIOR ; HYDROMAGNETIC-WAVES ; ULF WAVES |
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/279702 |
专题 | 气候变化 |
作者单位 | Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Z-Y,Zong, Q-G,Zhou, X-Z,et al. Pitch Angle Structures of Ring Current Ions Induced by Evolving Poloidal Ultra-Low FrequencyWaves[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(4). |
APA | Liu, Z-Y,Zong, Q-G,Zhou, X-Z,Zhu, Y-F,&Gu, S-J.(2020).Pitch Angle Structures of Ring Current Ions Induced by Evolving Poloidal Ultra-Low FrequencyWaves.GEOPHYSICAL RESEARCH LETTERS,47(4). |
MLA | Liu, Z-Y,et al."Pitch Angle Structures of Ring Current Ions Induced by Evolving Poloidal Ultra-Low FrequencyWaves".GEOPHYSICAL RESEARCH LETTERS 47.4(2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论