Authors: William Taranto (University of Delaware), Riddhi Bandyopadhyay (University of Delaware)
We analyze nearly three solar cycles of magnetic field observations from the Wind spacecraft using the Bandt-Pompe permutation entropy (H) and Jensen-Shannon statistical complexity (C) framework. By comparing these quantities with solar activity, we demonstrate that the level of stochasticity of the solar wind turbulence is strongly modulated by the solar cycle. H exhibits a positive correlation with sunspot solar activity, while C displays an anti-correlation. Intervals near solar maximum occupy regions of high H and low C in the C-H plane, while streams near solar minimum exhibit lower H and enhanced C. These results suggest that solar maximum conditions produce a more stochastic solar wind, whereas solar minimum conditions generate more organized dynamical states. Our findings establish a direct connection between solar magnetic activity and the stochasticity of interplanetary solar wind turbulence.
