Mass fraction of water vapor reaching the snow line via backward radial diffusion from r_evap = r_snow + v_gasτ_evap as a function of time. The panels show the cases of different $\overline{a}$, with values spanning from $\overline{a}$ = 0.1 μm to $\overline{a}$ = 1 mm. All shown cases use ξ = 5, and the line color indicates the velocity fluctuation reduction factor χ that was used. If a time average is applied to each panel, the result is Fig. 14.