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Multifractal and Chaotic Properties of Solar Wind at MHD and Kinetic Domains: An Empirical Mode Decomposition Approach
INAF Ist Astrofis & Planetol Spaziali, Rome, Italy.
INAF Ist Astrofis & Planetol Spaziali, , Rome, Italy.
Univ Calabria, Dipartimento Fis, Arcavacata Di Rende, Italy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.ORCID iD: 0000-0002-9707-3147
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2019 (English)In: Entropy, ISSN 1099-4300, E-ISSN 1099-4300, Vol. 21, no 3, article id 320Article in journal (Refereed) Published
Abstract [en]

Turbulence, intermittency, and self-organized structures in space plasmas can be investigated by using a multifractal formalism mostly based on the canonical structure function analysis with fixed constraints about stationarity, linearity, and scales. Here, the Empirical Mode Decomposition (EMD) method is firstly used to investigate timescale fluctuations of the solar wind magnetic field components; then, by exploiting the local properties of fluctuations, the structure function analysis is used to gain insights into the scaling properties of both inertial and kinetic/dissipative ranges. Results show that while the inertial range dynamics can be described in a multifractal framework, characterizing an unstable fixed point of the system, the kinetic/dissipative range dynamics is well described by using a monofractal approach, because it is a stable fixed point of the system, unless it has a higher degree of complexity and chaos.

Place, publisher, year, edition, pages
2019. Vol. 21, no 3, article id 320
Keywords [en]
solar wind, scaling properties, fractals, chaos
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-382995DOI: 10.3390/e21030320ISI: 000464391700002OAI: oai:DiVA.org:uu-382995DiVA, id: diva2:1315283
Available from: 2019-05-13 Created: 2019-05-13 Last updated: 2019-05-13Bibliographically approved

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Yordanova, Emiliya
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