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Power law distributions of burst duration and interburst interval in the solar wind: Turbulence or dissipative self-organized criticality?

Freeman, M.P.; Watkins, N.W.; Riley, D.J.. 2000 Power law distributions of burst duration and interburst interval in the solar wind: Turbulence or dissipative self-organized criticality? Physical Review E, 62 (6). 8794-8797. 10.1103/PhysRevE.62.8794

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Abstract/Summary

We calculate the probability density functions P of burst energy e, duration T, and interburst interval τ for a known turbulent system in nature. Bursts in the Earth-Sun component of the Poynting flux at 1 AU in the solar wind were measured using the MFI and SWE experiments on the NASA WIND spacecraft. We find P(e) and P(T) to be power laws, consistent with self-organized criticality (SOC). We find also a power-law form for P(τ) that distinguishes this turbulent cascade from the exponential P(τ) of ideal SOC, but not from some other SOC-like sandpile models. We discuss the implications for the relation between SOC and turbulence.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1103/PhysRevE.62.8794
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 1063-651X
Date made live: 26 Nov 2012 10:08
URI: http://nora.nerc.ac.uk/id/eprint/20542

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