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Scaling of solar wind e and the AU, AL and AE indices as seen by WIND
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Hnat, B., Chapman, Sandra C., Rowlands, G. (George), Watkins, Nicholas W. and Freeman, M. P. (Mervyn P.) (2002) Scaling of solar wind e and the AU, AL and AE indices as seen by WIND. Geophysical Research Letters, Vol.29 (No.22). doi:10.1029/2002GL016054 ISSN 0094-8276.
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Official URL: http://dx.doi.org/10.1029/2002GL016054
Abstract
We apply the finite size scaling technique to quantify the statistical properties of fluctuations in AU, AL and AE indices and in the 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 ~4 hours for AU, AL and and up to ~2 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 | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Solar wind, Magnetosphere, Geomagnetic indexes | ||||
Journal or Publication Title: | Geophysical Research Letters | ||||
Publisher: | American Geophysical Union | ||||
ISSN: | 0094-8276 | ||||
Official Date: | 2002 | ||||
Dates: |
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Volume: | Vol.29 | ||||
Number: | No.22 | ||||
DOI: | 10.1029/2002GL016054 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | Leverhulme Trust (LT), Particle Physics and Astronomy Research Council (Great Britain) (PPARC) |
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