Stokes number as a function of the orbital radius for Shakura-Sunayev α = 10⁻³ (top panel) and α = 10⁻⁴ (bottom panel). Both panels show curves corresponding to disk accretion rates of Ṁ = 10⁻⁷ M_⊙ yr⁻¹ (red), 10⁻⁸ M_⊙ yr⁻¹ (black), and 10⁻⁹ M_⊙ yr^-1 (blue). Despite being quantitatively distinct, each profile is characterized by a St ∝ r^9/10 scaling, as well as a dramatic (factor of ~100) increase in St across the ice sublimation front, owing to a change in the fragmentation threshold.