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| Titel |
Structure function measurements of the intermittent MHD turbulent cascade |
| VerfasserIn |
T. S. Horbury, A. Balogh |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 4, no. 3 ; Nr. 4, no. 3, S.185-199 |
| Datensatznummer |
250001686
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| Publikation (Nr.) |
 copernicus.org/npg-4-185-1997.pdf |
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| Zusammenfassung |
| The intertmittent nature of turbulence within solar wind plasma has
been demonstrated by several studies of spacecraft data. Using magnetic field data taken in high speed flows
at high heliographic latitudes by the Ulysses probe, the character of fluctuations within the
inertia] range is discussed. Structure functions are used extensively. A simple consideration of errors
associated with calculations of high moment structure functions is shown to be useful as a
practical estimate of the reliability of such calculations. For data sets of around 300
000 points, structure functions of moments above 5 are rarely reliable on the basis of this test,
highlighting the importance of considering uncertainties in such calculations. When unreliable results
are excluded, it is shown that inertial range polar fluctuations are well described by a
multifractal model of turbulent energy transfer. Detailed consideration of the scaling of high order
structure functions suggests energy transfer consistent with a "Kolmogorov" cascade. |
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