Quantifying scaling in the velocity field of the anisotropic\ud turbulent solar wind

Article English OPEN
Chapman, Sandra C. ; Hnat, B. (2007)
  • Publisher: American Geophysical Union
  • Related identifiers: doi: 10.1029/2007GL030518
  • Subject: QB
    arxiv: Nonlinear Sciences::Chaotic Dynamics | Physics::Fluid Dynamics | Physics::Space Physics

Solar wind turbulence is dominated by Alfvénic fluctuations with power spectral exponents that somewhat surprisingly evolve toward the Kolmogorov value of −5/3, that of hydrodynamic turbulence. We analyze in situ satellite observations at 1AU and show that the turbulence decomposes linearly into two coexistent components perpendicular and parallel to the local average magnetic field and determine their distinct intermittency independent scaling exponents. The first of these is consistent with recent predictions for anisotropic MHD turbulence and the second is closer to Kolmogorov-like scaling.
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