Permutation entropy and complexity analysis of large-scale solar wind structures and streams

Kilpua, Emilia K. J.; Good, Simon; Ala-Lahti, Matti; Osmane, Adnane; Koikkalainen, Venla

doi:https://doi.org/10.5194/angeo-42-163-2024

Articles | Volume 42, issue 1

https://doi.org/10.5194/angeo-42-163-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/angeo-42-163-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 42, issue 1

Regular paper

|

27 May 2024

Regular paper |

| 27 May 2024

Permutation entropy and complexity analysis of large-scale solar wind structures and streams

Emilia K. J. Kilpua, Simon Good, Matti Ala-Lahti, Adnane Osmane, and Venla Koikkalainen

Data sets

Coordinated Data Analysis Web (CDAWeb) Robert M. Candey https://cdaweb.gsfc.nasa.gov

Wind ICME Catalogue 1995−2021 Teresa Nieves-Chinchilla https://wind.nasa.gov/ICME_catalog/

Near-Earth Interplanetary Coronal Mass Ejections Since January 1996 Ian Richardson and Hilary Cane https://izw1.caltech.edu/ACE/ASC/DATA/level3/icmetable2.htm

Stream Interaction Regions (SIRs) from Wind and ACE Data during 1995−2009 Lan Jian http://www.srl.caltech.edu/ACE/ASC/

colorednoise.py Felix Patzelt https://github.com/felixpatzelt/colorednoise

fbm 0.3.0 Christopher Flynn https://pypi.org/project/fbm/

Short summary

The solar wind is organised into slow and fast streams, interaction regions, and transient structures originating from solar eruptions. Their internal characteristics are not well understood. A more comprehensive understanding of such features can give insight itno physical processes governing their formation and evolution. Using tools from information theory, we find that the solar wind shows universal turbulent properties on smaller scales, while on larger scales, clear differences arise.