Maximum ρ_d∕ρ_g and H_d ∕H_g at the maximum ρ_d∕ρ_g locations at t = 15000 Ω⁻¹ as a functionof α_Dz = α_Dr for different F_p/g. The back reaction to diffusion is included with K = 1 in panel b, but not (K = 0) in panel a. The other parameters are fixed as α_acc = 10⁻², Δx_subl= 0.1H_g, and Δz_sublH_p given by Eq. (19). Upper and bottom panels: the red dashed curves are the analytical formulas given by Eqs. (3) and (35) with Eq. (36). Lower panels: the green dashed lines represent Δz_subl ∕H_g.