Nor is it related to classical MHD turbulence, where a reverse cascade may create large-scale magnetic fields by turbulent dynamo action, possibly through a turbulent effect. They argue that the microscale fields are so tiny that they produce neither a significant turbulent effect, nor an enhancement in the mean field diffusivity. Nevertheless, the turbulent diffusivities of the mean thermal and chemical inhomogeneities are enormously greater than their molecular counterparts, at least in some directions.
Turbulent diffusion is represented by one tensor, the same for both heat and composition.
It is the highly dispersive character of rotating fluids that led to this unusual picture of core turbulence.