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Finite size scaling in the solar wind magnetic field energy density as seen by WIND

Hnat, B.; Chapman, S.C.; Rowlands, G.; Watkins, N.W.; Farrell, W.M.. 2002 Finite size scaling in the solar wind magnetic field energy density as seen by WIND. Geophysical Research Letters, 29 (10), 1446. 4, pp. 10.1029/2001GL014587

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Abstract/Summary

[1] 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 Levy 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.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1029/2001GL014587
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Magnetic Reconnection, Substorms and their Consequences
ISSN: 0094-8276
NORA Subject Terms: Physics
Atmospheric Sciences
Date made live: 15 Nov 2011 14:45
URI: http://nora.nerc.ac.uk/id/eprint/13402

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