IGGCAS OpenIR  > 地球与行星物理院重点实验室
Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region
He, Jiansen1; Duan, Die1; Zhu, Xingyu1; Yan, Limei2; Wang, Linghua1
2019-04-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume62Issue:4Pages:619-630
AbstractThe foreshock with nascent plasma turbulence is regarded as a fascinating region to understand basic plasma physical processes, e.g., wave-particle interactions as well as wave-wave couplings. Although there have been plenty of intensive studies on this topic, some key clues about the physical processes still lack observations. A relatively comprehensive case study with some new observations is presented in this work based on the WIND spacecraft observations. In this case, upstream energetic protons were drifting at tens of Alfven speed with respect to the background plasma protons. When looking at the magnetic wave activities, we find the co-existence of high-frequency (0.1-0.5 Hz) large-amplitude right-hand polarized (RHP) waves and low-frequency (0.02-0.1 Hz) small-amplitude left-hand polarized (LHP) waves in the spacecraft (SC) frame. The observed anticorrelation between magnetic and velocity fluctuations along with the sunward magnetic field direction indicates that the low-frequency LHP waves in the SC frame are in fact the sunward upstream RHP Alfvenic waves in the solar wind frame. This new observation corroborates the applicability of theories about plasma non-resonance instability and inverse cascade to the foreshock region, where the downstream high-frequency RHP parent waves are excited by the upstream energetic protons through non-resonance instability and the low-frequency RHP daughter waves are generated by the parent waves due to nonlinear parametric instability. Furthermore, enhanced downstream energetic proton fluxes are inferred to result from scattering of the upstream protons by the nascent turbulent fluctuations. Therefore, some critical clues about the newborn turbulence in the foreshock are provided in this work.
KeywordSolar wind Foreshock Wave-particle interaction Parametric instability
DOI10.1007/s11430-019-9330-3
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordMODULATIONAL INSTABILITY ; FINITE-AMPLITUDE ; NONLINEAR ALFVEN ; MAGNETIC-FIELD ; UPSTREAM WAVES ; ACCELERATION ; FLUCTUATIONS ; SIMULATION ; EVOLUTION ; SPECTRA
Language英语
Funding ProjectNational Natural Science Foundation of China[41574168] ; National Natural Science Foundation of China[41874200] ; National Natural Science Foundation of China[41674171] ; National Natural Science Foundation of China[41774183] ; National Natural Science Foundation of China[41421003]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000462228900002
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/91076
Collection地球与行星物理院重点实验室
Corresponding AuthorHe, Jiansen
Affiliation1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
He, Jiansen,Duan, Die,Zhu, Xingyu,et al. Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(4):619-630.
APA He, Jiansen,Duan, Die,Zhu, Xingyu,Yan, Limei,&Wang, Linghua.(2019).Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region.SCIENCE CHINA-EARTH SCIENCES,62(4),619-630.
MLA He, Jiansen,et al."Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region".SCIENCE CHINA-EARTH SCIENCES 62.4(2019):619-630.
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