Non-Gaussian statistics in space plasma turbulence, fractal properties and pitfalls

Details Non-Gaussian statistics in space plasma turbulence, fractal properties and pitfalls Non-Gaussian statistics in space plasma turbulence, fractal properties and pitfalls

1996-07-27

arxiv.org/abs/comp-gas/9607003v1

Nonlinear Sciences

Cellular Automata and Lattice Gases

13 pages (including 13 postscript figures), to appear in Nonlinear Processes in Geophysics

Scientific paper

Magnetic field fluctuations in the vicinity of the Earth's bow shock have been investigated with the aim to characterize the intermittent behaviour of strong plasma turbulence. The observed small-scale intermittency may be the signature of a multifractal process but a deeper inspection reveals caveats in such an interpretation. Several effects, including the anisotropy of the wavefield, the violation of the Taylor hypothesis and the occasional occurrence of coherent wave packets, strongly affect the higher order statistical properties. After correcting these effects, a more Gaussian and scale-invariant wavefield is recovered.

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