Gyre turbulence: Anomalous dissipation in a two-dimensional ocean model

We unveil a gyre turbulence regime within a two-dimensional wind-driven ocean model, where energy dissipation becomes independent of fluid viscosity. This anomalous dissipation is driven by a vigorous two-dimensional vortex gas overlaying a low energy western-intensified gyre, shedding light on the effect of boundary instabilities in disrupting the inverse energy cascade.