Convection of slow rotation (Ω = 1, solid lines) and fast rotation (Ω = 30, dashed lines). Left: Q_rr, right: Q_θθ (red lines) and Q_ϕϕ (blue lines). The gray-shaded area indicates the convectively unstable part with the vertical dashed line showing its center and d is the thickness of the convectively unstable layer. Correlations Q_rr, Q_θθ, and Q_ϕϕ and rotation rates Ω are given in code units. The volume-averaged turbulence intensity is and the co-latitude θ = 45°.