Mean grain size ⟨ a ⟩ [μm] (colour bar) and velocity field () at 0.1, 1, 10, 100 mbar and 1, 10 bar for different φ (longitudes) and θ (latitude). Note: the colour bar scale is different for each plot. The sub-stellar point is located at φ = 0°, θ = 0°. The smallest grains at each layer typically reside at the equatorial regions. The largest grains are typically found on the nightside and at higher latitudes. Deep purple/blue coloured regions at 1, 10 and 100 mbar contain seed particles of sizes ~0.001 μm