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Effect of Current Sheets on the Solar Wind Magnetic Field Power Spectrum from the Ulysses Observation: From Kraichnan to Kolmogorov Scaling
Li, G.; Miao, B.; Hu, Q.; Qin, G.; Li, G (reprint author), Univ Alabama, Dept Phys, Huntsville, AL 35899 USA.
Department空间科学部
Source PublicationPHYSICAL REVIEW LETTERS
2011
Volume106Issue:12Pages:125001
ISSN0031-9007
Language英语
AbstractThe MHD turbulence theory developed by Iroshnikov and Kraichnan predicts a k(-1.5) power spectrum. Solar wind observations, however, often show a k(-5/3) Kolmogorov scaling. Based on 3 years worth of Ulysses magnetic field data where over 28 000 current sheets are identified, we propose that the current sheet is the cause of the Kolmogorov scaling. We show that for 5 longest current-sheet-free periods the magnetic field power spectra are all described by the Iroshnikov-Kraichnan scaling. In comparison, for 5 periods that have the most number of current sheets, the power spectra all exhibit Kolmogorov scaling. The implication of our results is discussed.; The MHD turbulence theory developed by Iroshnikov and Kraichnan predicts a k(-1.5) power spectrum. Solar wind observations, however, often show a k(-5/3) Kolmogorov scaling. Based on 3 years worth of Ulysses magnetic field data where over 28 000 current sheets are identified, we propose that the current sheet is the cause of the Kolmogorov scaling. We show that for 5 longest current-sheet-free periods the magnetic field power spectra are all described by the Iroshnikov-Kraichnan scaling. In comparison, for 5 periods that have the most number of current sheets, the power spectra all exhibit Kolmogorov scaling. The implication of our results is discussed.
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/122/3229
Collection空间科学部
Corresponding AuthorLi, G (reprint author), Univ Alabama, Dept Phys, Huntsville, AL 35899 USA.
Recommended Citation
GB/T 7714
Li, G.,Miao, B.,Hu, Q.,et al. Effect of Current Sheets on the Solar Wind Magnetic Field Power Spectrum from the Ulysses Observation: From Kraichnan to Kolmogorov Scaling[J]. PHYSICAL REVIEW LETTERS,2011,106(12):125001.
APA Li, G.,Miao, B.,Hu, Q.,Qin, G.,&Li, G .(2011).Effect of Current Sheets on the Solar Wind Magnetic Field Power Spectrum from the Ulysses Observation: From Kraichnan to Kolmogorov Scaling.PHYSICAL REVIEW LETTERS,106(12),125001.
MLA Li, G.,et al."Effect of Current Sheets on the Solar Wind Magnetic Field Power Spectrum from the Ulysses Observation: From Kraichnan to Kolmogorov Scaling".PHYSICAL REVIEW LETTERS 106.12(2011):125001.
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