Intermittency is a well established feature for many complex physical systems in Nature. For these systems, energy at a given scale is not evenly distributed in space and any variable affected by intermittency alternates bursty activity to quiescence. Solar wind doesn't represent an exception to the rule since the strong intermittent character of its fluctuations has been widely reported in literature However, so far, it has never been possible to extract intermittency from a given time series in order to show experimentally its effects on the analysis. Local Intermittency Measure provides the tools to achieve such an interesting task. This method, based on the use of wavelets, allows to locate in space and time those events which produce intermittency. Then, these same events can be removed and a new time series, without intermittency, can be reconstructed and studied. In this paper we report about the effects, experimentally determined, of intermittency on some of the parameters characterising solar wind MHD turbulence.

Solar wind intermittency studied via local intermittency measure

PIETROPAOLO, Ermanno;
1999-01-01

Abstract

Intermittency is a well established feature for many complex physical systems in Nature. For these systems, energy at a given scale is not evenly distributed in space and any variable affected by intermittency alternates bursty activity to quiescence. Solar wind doesn't represent an exception to the rule since the strong intermittent character of its fluctuations has been widely reported in literature However, so far, it has never been possible to extract intermittency from a given time series in order to show experimentally its effects on the analysis. Local Intermittency Measure provides the tools to achieve such an interesting task. This method, based on the use of wavelets, allows to locate in space and time those events which produce intermittency. Then, these same events can be removed and a new time series, without intermittency, can be reconstructed and studied. In this paper we report about the effects, experimentally determined, of intermittency on some of the parameters characterising solar wind MHD turbulence.
92-9092-792-5
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/43604
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