Observations of turbulence within reconnection jet in the presence of guide field
文献类型：期刊论文
| 作者 | 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. |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2012 |
| 卷号 | 39页码:L11104 |
| ISSN号 | 0094-8276 |
| 通讯作者 | Deng, XH (reprint author), Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Peoples R China. |
| 中文摘要 | 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. |
| 英文摘要 | 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. |
| 学科主题 | 空间物理 |
| 资助信息 | NSFC [40890163, 41004060, 41174148]; Fundamental Research Funds for the Central Universities; Specialized Research Fund for State Key Laboratories; China Scholarship Council |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3257]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 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..,...&Wang, D. D..(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. |
入库方式： OAI收割
来源：国家空间科学中心
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