Upper panel: surface density of planetesimals at the end of the disk buildup stage (at 7 × 10⁵ yr, gray dashed line) and at the end of the disk lifetime (at 10⁷ years, red solid line) obtained in the model with α_v = 10⁻³ and α_t = 10⁻⁵. The black dotted line corresponds to the minimum mass solar nebula. Lower panel: radial and time distribution of planetesimal formation in the same model. The light blue solid line shows the location of the snow line.