Affiliation:
1. School of Electronic Information Hubei Luojia Laboratory Wuhan University Wuhan China
2. Laboratoire de Physique des Plasmas CNRS‐Ecole Polytechnique‐Sorbonne Université‐Paris‐Saclay‐Observatoire de Paris‐Meudon Palaiseau France
Abstract
AbstractThe Kolmogorov scaling in the inertial range of scales is a distinct characteristic of fully developed turbulence, and studying it offers valuable insights into the evolution of turbulence. In this work, we perform a statistical survey of the power spectra with the Kolmogorov scaling in Saturn's magnetosphere using Cassini measurements. Two cases study show that both magnetic‐field and electron density spectra exhibit f −5/3 at the MHD scales. The statistical analysis reveals a wide‐ranging and abundant presence of Kolmogorov spectra throughout magnetosphere, observed across all local times. Interestingly, the occurrence rate of these Kolmogorov‐like events within Saturn's magnetosphere surpasses that observed in the planetary magnetosheath. The measurements of magnetic compressibility for the Kolmogorov‐like events show the dominance of incompressible Alfvénic turbulence (44.64%) with respect to magnetosonic‐like one (6.94%). In addition, the source and evolution of the turbulent fluctuations are further discussed.
Publisher
American Geophysical Union (AGU)
Subject
General Earth and Planetary Sciences,Geophysics