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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/npg-2017-47
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Review article
07 Aug 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Nonlinear Processes in Geophysics (NPG).
Evolution of fractality in magnetized plasmas
Víctor Muñoz1, Macarena Domínguez2, Juan Alejandro Valdivia1,3, Simon Good4, Giuseppina Nigro5, and Vincenzo Carbone5 1Departamento de Física, Facultad de Ciencias, Universidad de Chile, Chile
2Departamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Chile
3Centro para la Nanociencia y la Nanotecnología, CEDENNA, Chile
4The Blackett Laboratory, Imperial College London, UK
5Dipartimento di Fisica, Università della Calabria, Italy
Abstract. We studied the temporal evolution of fractality for geomagnetic activity, by calculating fractal dimensions from Dst data and from an MHD shell model for a turbulent magnetized plasma, which may be a useful model to study geomagnetic activity under solar wind forcing. We show that the shell model is able to reproduce the relationship between the fractal dimension and the occurrence of dissipative events, but only in a certain region of viscosity and resistivity values. We also present preliminary results of the application of these ideas to the study of the magnetic field time series in the solar wind during magnetic clouds. Results suggest that the fractal dimension is able to characterize the complexity of the magnetic cloud structure.

Citation: Muñoz, V., Domínguez, M., Valdivia, J. A., Good, S., Nigro, G., and Carbone, V.: Evolution of fractality in magnetized plasmas, Nonlin. Processes Geophys. Discuss., https://doi.org/10.5194/npg-2017-47, in review, 2017.
Víctor Muñoz et al.
Víctor Muñoz et al.
Víctor Muñoz et al.

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