Relative degree of order in radial evolution of solar wind fluctuations

摘要

In the last two decades we have assisted at a growing interest in the study of complexity and complex dynamics in space plasmas. This is particularly true in the case of interplanetary and magnetospheric space plasmas which display turbulence, self organization and/or self-organized critical dynamics. Here, I present some preliminary results on the evolution of order in the radial evolution of solar wind magnetic field. In detail, using the criterion contained in the S-Theorem by Klimontovich [1], I compute the relative degree of order for the magnetic field intensity fluctuations at different radial distances as observed by interplanetary mission. The preliminary results seems to point toward and increase of order with the radial distance, suggesting the occurrence of structuring (formation of structures) in the course of the evolution.