Timescales of our reference model (cf. Table 2) relevant to the long-term evolution of a PPD and a large-scale magnetic field. The solid blue, orange, and green lines correspond to the viscous timescale, t_visc; the dynamical timescale, t_dyn; and the magnetic diffusion timescale, t_diff, respectively. The vertical, dashed black lines correspond to the corotation radius, R_cor, and the outer DZ boundary, r_DZ, out. Finally, the gray area marks the region between 1 Myr and 4 Myrs and depicts the expected lifetime of a PPD.