Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 36, issue 4
Articles | Volume 36, issue 4
https://doi.org/10.5194/angeo-36-945-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-36-945-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 36, issue 4
ANGEO Communicates
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02 Jul 2018
ANGEO Communicates | Highlight paper |  | 02 Jul 2018

Transfer entropy and cumulant-based cost as measures of nonlinear causal relationships in space plasmas: applications to Dst

Jay R. Johnson, Simon Wing, and Enrico Camporeale

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Short summary
The magnetospheric response to the solar wind is nonlinear. Information theoretical tools are able to characterize the nonlinearities in the system. We show that nonlinear significance of Dst peaks at lags of 3–12 hours which can be attributed to VBs, which also exhibits similar behavior. However, the nonlinear significance that peaks at lags of 25, 50, and 90 hours can be attributed to internal dynamics, which may be related to the relaxation of the ring current.
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