All four giant planets in the solar system possess strong internal magnetic fields and surface differential rotation. The surface differential rotation at the giant planets is also commonly referred to as zonal flows or zonal jets. Both their magnetic fields and surface zonal flows feature a dichotomy: Jupiter and Saturn feature axial-dipole-dominant magnetic field and equatorial super-rotation while Uranus and Neptune feature multipolar magnetic field and equatorial sub-rotation. The dynamical origin of these dichotomies remains elusive, as rotating turbulence inside giant planets operate in extreme parameter space.
Here I will review recent progress in our knowledge and understanding of giant planet interior dynamics, including the depth of rapid zonal flows, morphology and time variation of their magnetic fields, and discoveries of stable stratification in their deep interior. Application of rotating turbulence scaling laws to the giant planets will then be discussed. I will conclude this presentation with a list of open questions about the inner workings of giant planets.
Copyright. All Rights Reserved.