Finite size scaling in the solar wind magnetic field energy density as seen by WIND
Article first published online: 28 MAY 2002
Copyright 2002 by the American Geophysical Union.
Geophysical Research Letters
Volume 29, Issue 10, pages 86-1–86-4, May 2002
How to Cite
Finite size scaling in the solar wind magnetic field energy density as seen by WIND, Geophys. Res. Lett., 29(10), doi:10.1029/2001GL014587, 2002., , , , and ,
- Issue published online: 28 MAY 2002
- Article first published online: 28 MAY 2002
- Manuscript Accepted: 26 MAR 2002
- Manuscript Revised: 22 MAR 2002
- Manuscript Received: 18 DEC 2001
 Statistical properties of the interplanetary magnetic field fluctuations can provide an important insight into the solar wind turbulent cascade. Recently, analysis of the Probability Density Functions (PDF) of the velocity and magnetic field fluctuations has shown that these exhibit non-Gaussian properties on small time scales while large scale features appear to be uncorrelated. Here we apply the finite size scaling technique to explore the scaling of the magnetic field energy density fluctuations as seen by WIND. We find a single scaling sufficient to collapse the curves over the entire investigated range. The rescaled PDF follow a non Gaussian distribution with asymptotic behavior well described by the Gamma distribution arising from a finite range Lévy walk. Such mono scaling suggests that a Fokker-Planck approach can be applied to study the PDF dynamics. These results strongly suggest the existence of a common, nonlinear process on the time scale up to 26 hours.