Evolution of the water snow line, R₁₅₀. The snow line is initially located at about 10 AU and migrates inward in time as the disk evolves and loses its mass, finally stabilizing at ~5 AU. High-resolution runs are overplotted. R_80ky_ℓ18 has consistent temperature, while in R_40ky_ℓ18 the snow line migrates to a larger radius, possibly due to the mass accumulation in the disk and the increase in opacity. This reflects the importance of properly choosing n_acc with increased resolution (see Sect. 3.3). The run with no stellar irradiation is also plotted for comparison, where the temperature is significantly lower.