Evolution (from top to bottom) of the averaged active region magnetic field and flows for the four subsample averages of unsigned latitude |λ| (with |λ| increasing from left to right, cf. right panel of Fig. 3). The labels, color scales, and arrow scales are the same as in Fig. 4. The diverging flow in the bottom row of the third subsample is due to a strong moat flow in AR 11158, which is the largest AR in this subsample at this time.