Effects of anisotropy in geostrophic turbulence

TL;DR

This paper investigates how rapid rotation-induced anisotropy affects energy transfer and wave interactions in geostrophic turbulence, with implications for understanding convection in geodynamo models.

Contribution

It provides a detailed analysis of anisotropy effects on energy transfer and wave interactions in rotating convection models relevant to geodynamo simulations.

Findings

Rotation suppresses energy transfer in the system.

Anisotropy alters the structure of the wave triangle in nonlinear interactions.

Results are adapted to geodynamo convection models.

Abstract

The Boussinesq model of convection in a flat layer with heating from below is considered. We analyze the effects of anisotropy caused by rapid rotation in physical and wave spaces and demonstrate the suppression of energy transfer by rotation. We also examine the structure of the wave triangle in nonlinear interaction. The range of parameters is adapted to the models of convection in the geodynamo.