Dynamical Complexity in Dst Time Series Using Entropy Concepts

Details Dynamical Complexity in Dst Time Series Using Entropy Concepts Dynamical Complexity in Dst Time Series Using Entropy Concepts

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..424...57b&link_type=abstract

Proceedings of the 9th International Conference of the Hellenic Astronomical Society, proceedings of a conference held 20-24 Sep

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The complex system of the Earth’s magnetosphere corresponds to an open spatially extended nonequilibrium (input - output) dynamical system. This paper explores the applicability and effectiveness of a variety of computable entropy measures (e.g. Block entropy, T-complexity and Approximate entropy) to the investigation of dynamical complexity in the magnetosphere. We show that as the magnetic storm approaches there is clear evidence of significant lower complexity (higher organization) in the magnetosphere. Approximate entropy yields superior results for detecting dynamical complexity changes in the magnetosphere in comparison to the other entropy measures presented herein. The analysis tools developed in the course of this study for the treatment of Dst index can provide convenience for space weather applications.

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