Subcritical turbulent condensate in rapidly rotating Rayleigh–Bénard convection

摘要: The possibility of subcritical behaviour in the geostrophic turbulence regime rapidly rotating thermally driven convection is explored. In this a non-local inverse energy transfer may compete with more traditional and local direct cascade. We show that, even for control parameters which no cascade has previously been observed, transition towards large-scale vortex state can occur when system initialized dipole finite amplitude. This new example bistability turbulent flow, not be specific to convection, opens up avenues studying strongly anisotropic three-dimensional flows such as atmospheric or oceanic circulations.