Abundance maps of CO₂ for the models with no cavity (top row), a 1 AU cavity (middle row), and a 5 AU cavity (bottom row) for the grids with an input stellar spectrum with L_* = 0.2 L_⊙ (first column), L_* = 0.4 L_⊙ (second column), L_* = 0.8 L_⊙ (third column), and L_* = 1.4 L_⊙ (the fiducial grid, fourth column). The CO₂ snowline (defined as n_gas/n_ice = 1) is indicated with a solid light pink line. The dashed, dark blue line shows the dust τ = 1 surface at 15 µm. The red contours indicate the origin of 90% of the CO₂ 01¹0 − 00⁰0 Q(20) line emission (E_up = 1196 K).