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

Hnat, B.; Chapman, S.C.; Rowlands, G.; Watkins, N.W.; Freeman, M.P. ORCID: https://orcid.org/0000-0002-8653-8279. 2002 Scaling of solar wind epsilon and the AU, AL and AE indices by WIND. Geophysical Research Letters, 29 (22), 2078. 4, pp. 10.1029/2002GL016054

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Abstract/Summary

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:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2002GL016054
Programmes:	BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Magnetic Reconnection, Substorms and their Consequences
ISSN:	0094-8276
Additional Information. Not used in RCUK Gateway to Research.:	Correction published 18 April 2003
NORA Subject Terms:	Physics Atmospheric Sciences
Date made live:	15 Nov 2011 14:50 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/13403

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