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Scaling of solar wind epsilon and the AU, AL and AE indices as seen by WIND

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UNSPECIFIED (2002) Scaling of solar wind epsilon and the AU, AL and AE indices as seen by WIND. GEOPHYSICAL RESEARCH LETTERS, 29 (22). -. doi:10.1029/2002GL016054 ISSN 0094-8276.

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Official URL: http://dx.doi.org/10.1029/2002GL016054

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Abstract

We apply the finite size scaling technique to quantify the statistical properties of fluctuations in AU, AL and AE indices and in the epsilon parameter that represents energy input from the solar wind into the magnetosphere. We find that the exponents needed to rescale the probability density functions (PDF) of the fluctuations are the same to within experimental error for all four quantities. This self-similarity persists for time scales up to similar to4 hours for AU, AL and epsilon and up to similar to2 hours for AE. Fluctuations on shorter time scales than these are found to have similar long-tailed (leptokurtic) PDF, consistent with an underlying turbulent process. These quantitative and model-independent results place important constraints on models for the coupled solar wind-magnetosphere system.

Item Type: Journal Article
Subjects: Q Science > QE Geology
Journal or Publication Title: GEOPHYSICAL RESEARCH LETTERS
Publisher: AMER GEOPHYSICAL UNION
ISSN: 0094-8276
Official Date: 15 November 2002
Dates:
DateEvent
15 November 2002UNSPECIFIED
Volume: 29
Number: 22
Number of Pages: 4
Page Range: -
DOI: 10.1029/2002GL016054
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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