Distribution of different types of structure in terms of the mean scanned dissipation across the discontinuity. The black curve is the total distribution of scans, whereas coloured curves are identified structures’ contributions. The white area corresponds to unknown dissipation scans. Top plots are for ABC initial conditions, while bottom ones are for the OT flow. Distributions on the left are at an early time (≃1/3t_tumover). The right panel shows the same distribution at t = t_tmmover.