Multifractal structure of speed fluctuations in recurrent streams at 1 AU and near 6 AU

Details Multifractal structure of speed fluctuations in recurrent streams at 1 AU and near 6 AU Multifractal structure of speed fluctuations in recurrent streams at 1 AU and near 6 AU

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1651b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Aug. 1991, p. 1651-1654.

Physics

44

Solar Wind Velocity, Spectrum Analysis, Velocity Distribution, Distribution Functions, Fractals, Intermittency, Turbulence Effects

Scientific paper

This paper demonstrates the existence of multifractal structure in the velocity fluctuations associated with recurrent streams at 1 AU and near 6 AU. There is a significant evolution of the multifractal spectrum from 1 AU to 6 AU. At 1 AU the fluctuations on all scales in the indicated range are related to the local speed gradients associated with the stream structure. Near 6 AU the multifractal structure of the speed fluctuations approaches the universal form for intermittent turbulence for moments when q is greater than 5, and it has approximately the value expected for a set of discontinuities for q = 2.

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