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DOI | 10.1029/2019GL083421 |
Magnetospheric Multiscale Observation of Quasiperiodic EMICWaves Associated With Enhanced Solar Wind Pressure | |
Liu, Si1,2,3; Xia, Zhiyang2; Chen, Lunjin2; Liu, Yang1,3; Liao, Zedong1,3; Zhu, Hui2 | |
2019-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:13页码:7096-7104 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | We present a Magnetospheric Multiscale mission observation of quasiperiodic electromagnetic ion cyclotron (EMIC) variations on 24 December 2015 corresponding to magnetic field depressions as well as proton pitch angle anisotropy enhancements. Proton dynamic pressure obtained by WIND indicates that the solar wind was periodically compressing the magnetosphere with a period similar to 7.5 min, which is consistent with the EMIC modulation period observed by the Magnetospheric Multiscale. Numerical calculations demonstrate that the EMIC modulation period is comparable with the magnetic field line resonance period, suggesting that quasiperiodic solar wind enhancement compressing the magnetosphere and propagating as the fast mode can lead to the magnetic field line oscillation and hence the presence of quasiperiodic magnetic compressions and discrete proton anisotropy elements, which provides optimal conditions for modulating the EMIC instability. Current results provide a complete chain of self-consistent observational evidences to illustrate the process connecting solar wind variations to EMIC wave amplitude modulation in the magnetosphere. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000476960100004 |
WOS关键词 | ION-CYCLOTRON WAVES ; PITCH-ANGLE SCATTERING ; VAN ALLEN PROBES ; EMIC WAVES ; RELATIVISTIC ELECTRONS ; PLASMA ; INSTABILITIES ; PRECIPITATION ; DISTRIBUTIONS ; MAGNETOMETER |
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/185023 |
专题 | 气候变化 |
作者单位 | 1.Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha, Hunan, Peoples R China; 2.Univ Texas Dallas, Dept Phys, William B Hanson Ctr Space Sci, Richardson, TX 75083 USA; 3.Changsha Univ Sci & Technol, Hunan Prov Key Lab Flexible Elect Mat Genome Engn, Changsha, Hunan, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Si,Xia, Zhiyang,Chen, Lunjin,et al. Magnetospheric Multiscale Observation of Quasiperiodic EMICWaves Associated With Enhanced Solar Wind Pressure[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7096-7104. |
APA | Liu, Si,Xia, Zhiyang,Chen, Lunjin,Liu, Yang,Liao, Zedong,&Zhu, Hui.(2019).Magnetospheric Multiscale Observation of Quasiperiodic EMICWaves Associated With Enhanced Solar Wind Pressure.GEOPHYSICAL RESEARCH LETTERS,46(13),7096-7104. |
MLA | Liu, Si,et al."Magnetospheric Multiscale Observation of Quasiperiodic EMICWaves Associated With Enhanced Solar Wind Pressure".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7096-7104. |
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