Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm51a2059c&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM51A-2059
Physics
Plasma Physics
[2744] Magnetospheric Physics / Magnetotail, [2790] Magnetospheric Physics / Substorms, [7863] Space Plasma Physics / Turbulence
Scientific paper
One of the phenomena occurring at the onset of magnetospheric substorms is the disruption of the cross-tail current. In the course of the years, this phenomenon has been clearly shown to be characterized by a large spectrum of fluctuations occurring over a large scale interval. Here, the multiscale nature and the complex features of the cross-coupling between the different scales is investigated in the case of an already studied magnetotail current disruption event, observed by a THEMIS satellite on 29 January 2008, by means of the Hilbert-Huang Transform (HHT) and an information theory approach. A particular attention is devoted to the presence of a dual cascading process: an inverse cascading process in the MHD domain (already suggested in several works) and a direct cascading process toward non-MHD scales.
Consolini Giuseppe
de Michelis Paola
Tozzi Roberta
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