Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079006 |
MMS Observations of Harmonic Electromagnetic Ion Cyclotron Waves | |
Usanova, M. E.1; Ahmadi, N.1; Malaspina, D. M.1; Ergun, R. E.1; Trattner, K. J.1; Reece, Q.1,2; Leonard, T.1; Fuselier, S. A.3,4; Torbert, R. B.5; Russell, C. T.6; Burch, J. L.3 | |
2018-09-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:17页码:8764-8772 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Harmonically related electromagnetic ion cyclotron waves with the fundamental frequency near the double oxygen cyclotron frequency were observed by the MMS spacecraft on 18-20 May 2016. The wave activity lasted for three days, detected by the spacecraft on their consecutive inbound passages through the Earth's plasma sheet boundary layer. The waves were seen in both magnetic and electric fields, formed by over 10 higher order harmonics. Simultaneous ion flux measurements show the presence of ion ring distributions suggesting the energy source for the observed waves. The ion cyclotron harmonics were observed together with broadband waves extending from similar to Hz to similar to kHz frequency range, ion and electron phase space holes, and chorus waves. During some intervals, there is a clear modulation of chorus wave packets at the ion cyclotron fundamental harmonic frequency. These observations are particularly interesting since they suggest cross-frequency and cross-species coupling between processes happening on ion and electron scales. Plain Language Summary We presented an example oxygen harmonic wave event observed by the MMS spacecraft in the morning magnetosphere. The observed harmonic waves are transverse electromagnetic and propagate almost parallel to the background magnetic field at lower harmonics and become electrostatic at higher harmonics. Energetic ion measurements show enhanced approximately a few keV H+ and O+ fluxes and the presence of H+ and O+ ring distributions suggesting that the wave energy source for the observed waves is provided by these distributions. Harmonics were accompanied by higher frequency broadband waves extending from similar to Hz to similar to kHz frequency range, similar to ms spikes in the electric field and chorus waves. The latter were modulated at the fundamental frequency of the ion cyclotron harmonic wave. These observations are particularly interesting since they suggest cross-frequency and cross-species coupling between kinetic plasma processes happening on ion and electron scales. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445727500008 |
WOS关键词 | SHEET BOUNDARY-LAYER ; MAGNETIC STORMS ; ENERGY ; MAGNETOSPHERE ; DISTRIBUTIONS ; ACCELERATION ; PLASMASPHERE ; PROPAGATION |
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/27734 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA; 2.Boulder High Sch, Boulder, CO USA; 3.Southwest Res Inst, San Antonio, TX USA; 4.Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX USA; 5.Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA; 6.Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA |
推荐引用方式 GB/T 7714 | Usanova, M. E.,Ahmadi, N.,Malaspina, D. M.,et al. MMS Observations of Harmonic Electromagnetic Ion Cyclotron Waves[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(17):8764-8772. |
APA | Usanova, M. E..,Ahmadi, N..,Malaspina, D. M..,Ergun, R. E..,Trattner, K. J..,...&Burch, J. L..(2018).MMS Observations of Harmonic Electromagnetic Ion Cyclotron Waves.GEOPHYSICAL RESEARCH LETTERS,45(17),8764-8772. |
MLA | Usanova, M. E.,et al."MMS Observations of Harmonic Electromagnetic Ion Cyclotron Waves".GEOPHYSICAL RESEARCH LETTERS 45.17(2018):8764-8772. |
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