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| Titel |
Spectral scaling in the turbulent Earth's plasma sheet revisited |
| VerfasserIn |
Z. Vörös, W. Baumjohann, R. Nakamura, A. Runov, M. Volwerk, Y. Asano, D. Jankovičová, E. A. Lucek, H. Rème |
| 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 ; 14, no. 4 ; Nr. 14, no. 4 (2007-08-20), S.535-541 |
| Datensatznummer |
250012249
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| Publikation (Nr.) |
 copernicus.org/npg-14-535-2007.pdf |
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| Zusammenfassung |
| Bursty bulk flow associated magnetic fluctuations exhibit at least
three spectral scaling ranges in the Earth's plasma sheet. Two of
the three scaling ranges can be associated with multi-scale
magnetohydrodynamic turbulence between the spatial scales from
~100 km to several RE (RE is the Earth's radius). These
scales include the inertial range and below ~0.5 RE a
steepened scaling range, theoretically not fully understood yet. It
is shown that, in the near-Earth plasma sheet, the inertial range
can be robustly identified only if multi-scale quasi stationary
(MSQS) data intervals are selected. Multiple bursty flow associated
magnetic fluctuations, however, exhibit 1/f type scaling
indicating that large-scale fluctuations are controlled by multiple
uncorrelated driving sources of the bulk flows (e.g. magnetic
reconnection, instabilities). |
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