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Observations of turbulence within reconnection jet in the presence of guide field
Huang, S. Y.; Zhou, M.; Sahraoui, F.; Vaivads, A.; Deng, X. H.; Andre, M.; He, J. S.; Fu, H. S.; Li, H. M.; Yuan, Z. G.; Wang, D. D.; Deng, XH (reprint author), Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Peoples R China.
Department空间科学部
Source PublicationGEOPHYSICAL RESEARCH LETTERS
2012
Volume39Pages:L11104
ISSN0094-8276
Language英语
AbstractWe present the first comprehensive observations of turbulence properties within high speed reconnection jet in the plasma sheet with moderate guide field. The power spectral density index is about -1.73 in the inertial range, and follows the value of -2.86 in the ion dissipation range. The turbulence is strongly anisotropic in the wave-vector space with the major power having its wave-vector highly oblique to the ambient magnetic field, suggesting that the turbulence is quasi-2D. The measured "dispersion relations" obtained using the k-filtering technique are compared with theory and are found to be consistent with the Alfven-Whistler mode. In addition, both Probability Distribution Functions and flatness results show that the turbulence in the reconnection jet is intermittent (multifractal) at scales less than the proton gyroradius/inertial lengths. The estimated electric field provided by anomalous resistivity caused by turbulence is about 3 mV/m, which is close to the typical reconnection electric field in the magnetotail. Citation: Huang, S. Y., et al. (2012), Observations of turbulence within reconnection jet in the presence of guide field, Geophys. Res. Lett., 39, L11104, doi:10.1029/2012GL052210.; We present the first comprehensive observations of turbulence properties within high speed reconnection jet in the plasma sheet with moderate guide field. The power spectral density index is about -1.73 in the inertial range, and follows the value of -2.86 in the ion dissipation range. The turbulence is strongly anisotropic in the wave-vector space with the major power having its wave-vector highly oblique to the ambient magnetic field, suggesting that the turbulence is quasi-2D. The measured "dispersion relations" obtained using the k-filtering technique are compared with theory and are found to be consistent with the Alfven-Whistler mode. In addition, both Probability Distribution Functions and flatness results show that the turbulence in the reconnection jet is intermittent (multifractal) at scales less than the proton gyroradius/inertial lengths. The estimated electric field provided by anomalous resistivity caused by turbulence is about 3 mV/m, which is close to the typical reconnection electric field in the magnetotail. Citation: Huang, S. Y., et al. (2012), Observations of turbulence within reconnection jet in the presence of guide field, Geophys. Res. Lett., 39, L11104, doi:10.1029/2012GL052210.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3257
Collection空间科学部
Corresponding AuthorDeng, XH (reprint author), Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Peoples R China.
Recommended Citation
GB/T 7714
Huang, S. Y.,Zhou, M.,Sahraoui, F.,et al. Observations of turbulence within reconnection jet in the presence of guide field[J]. GEOPHYSICAL RESEARCH LETTERS,2012,39:L11104.
APA Huang, S. Y..,Zhou, M..,Sahraoui, F..,Vaivads, A..,Deng, X. H..,...&Deng, XH .(2012).Observations of turbulence within reconnection jet in the presence of guide field.GEOPHYSICAL RESEARCH LETTERS,39,L11104.
MLA Huang, S. Y.,et al."Observations of turbulence within reconnection jet in the presence of guide field".GEOPHYSICAL RESEARCH LETTERS 39(2012):L11104.
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