| 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 Publication | GEOPHYSICAL RESEARCH LETTERS
 |
| 2012 | |
| Volume | 39Pages:L11104 |
| ISSN | 0094-8276 |
| Language | 英语 |
| Abstract | 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.; 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 By | SCI ; 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 |
| Identifier | http://ir.nssc.ac.cn/handle/122/3257 |
| Collection | 空间科学部 |
| Corresponding Author | Deng, 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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| 201239L11104.pdf（2691KB） | 开放获取 | CC BY-NC-SA | Application Full Text | |||
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