Fractional abundance with respect to gas number density of N₂ (top row), NH₃ (middle row), and HCN (bottom row) as a function of Z/R at R = 10 AU for each disk model. The black dashed lines, orange lines, cyan lines, green lines, and gold lines represent results from the fiducial model and a model in which (i) all species are initially atomic; (ii) all nitrogen is in N₂ gas; (iii) all nitrogen is in N₂ ice, and (iv) all nitrogen is in NH₃ ice, respectively.