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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath

文献类型：期刊论文

作者Yao, S. T.1,2; Shi, Q. Q.1; Yao, Z. H.3,4; Li, J. X.5; Yue, C.5; Tao, X.6; Degeling, A. W.1; Zong, Q. G.7; Wang, X. G.8; Tian, A. M.1
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2019-01-28
卷号46期号:2页码:523-533
ISSN号0094-8276
DOI10.1029/2018GL080696
英文摘要Kinetic scale magnetic dips (KSMDs), with a significant depression in magnetic field strength, and scale length close to and less than one proton gyroradius, were reported in the turbulent plasmas both in recent observation and numerical simulation studies. These KSMDs likely play important roles in energy conversion and dissipation. In this study, we present observations of the KSMDs that are labeled whistler mode waves, electrostatic solitary waves, and electron cyclotron waves in the magnetosheath. The observations suggest that electron temperature anisotropy or beams within KSMD structures provide free energy to generate these waves. In addition, the occurrence rates of the waves are higher in the center of the magnetic dips than at their edges, implying that the KSMDs might be the origin of various kinds of waves. We suggest that the KSMDs could provide favorable conditions for the generation of waves and transfer energy to the waves in turbulent magnetosheath plasmas. Plain Language Summary The Earth's magnetosheath is a turbulent plasma environment where energy conversion, particle acceleration, and mass and momentum transport take place. Many of these key processes involve kinetic-scale physics. However, in-depth studies from previous missions are limited by their lower spacecraft data resolution. The recent Magnetospheric Multiscale (MMS) mission provides us with a large amount of high-temporal cadence data for studying kinetic-scale physics in the magnetosheath. In this study, we report whistler mode waves, electrostatic solitary waves and electron cyclotron waves within kinetic-scale magnetic dips (KSMDs) that can be generated in the turbulent magnetosheath. These waves could be excited by electron temperature anisotropy or beams. As is well known, plasma waves are important processes in converting energy, accelerating and scattering electrons and ions, and modifying the distributions of charged particles. If plasma instabilities develop within the KSMDs, the resulting waves could absorb free energy from plasma particles and may propagate out of the KSMDs. Thus, our discoveries could significantly advance the understanding of energy conversion and dissipation for kinetic-scale turbulence. This study provides a new reference not only for observations in space physics but also for related basic plasma theories and numerical simulations.
WOS关键词ELECTRON SOLITARY WAVES ; WHISTLER-MODE WAVES ; SOLAR-WIND ; PLASMA-WAVES ; THEMIS OBSERVATIONS ; ALFVEN WAVES ; HOLES ; DIFFUSION ; TURBULENCE ; DISCONTINUITIES
资助项目CNES ; CNRS-INSIS ; CNRS-INSU ; National Natural Science Foundation of China[41774153] ; National Natural Science Foundation of China[41574157] ; National Natural Science Foundation of China[41628402] ; National Natural Science Foundation of China[41674165] ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai[2017WHWLJH08]
WOS研究方向Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000458607400001
资助机构CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai ; CNES ; CNES ; CNRS-INSIS ; CNRS-INSIS ; CNRS-INSU ; CNRS-INSU ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; International Space Science Institute (ISSI) ; International Space Science Institute (ISSI) ; young scholar plan of Shandong University at Weihai ; young scholar plan of Shandong University at Weihai
源URL[http://ir.iggcas.ac.cn/handle/132A11/90686]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Shi, Q. Q.
作者单位1.Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China
2.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China
3.UCL, Mullard Space Sci Lab, London, England
4.Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium
5.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA
6.Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei, Anhui, Peoples R China
7.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
8.Harbin Inst Technol, Dept Phys, Harbin, Heilongjiang, Peoples R China
9.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA
10.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Yao, S. T.,Shi, Q. Q.,Yao, Z. H.,et al. Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(2):523-533.
APA Yao, S. T..,Shi, Q. Q..,Yao, Z. H..,Li, J. X..,Yue, C..,...&Giles, B. L..(2019).Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath.GEOPHYSICAL RESEARCH LETTERS,46(2),523-533.
MLA Yao, S. T.,et al."Waves in Kinetic-Scale Magnetic Dips: MMS Observations in the Magnetosheath".GEOPHYSICAL RESEARCH LETTERS 46.2(2019):523-533.

入库方式： OAI收割

来源：地质与地球物理研究所

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