Mean toroidal field as a function of latitude and time as in Figure 1(d) (same radial level, color scale, saturation ±4 kG) with (a) α ₀ = 1 m s ⁻¹, (b), (c) α ₀ = 10 m s ⁻¹, and (d), (e) α ₀ = 100 m s ⁻¹. Frame (c) represents a continuation of frame (b) at much later times. Frame (e) is a zoomed-in portion of frame (d) highlighting the magnetic cycles.