For better understanding of the regimes of thermal and non-thermal ionisation, the radial and vertical profiles of (a) ionisation fraction, x_e; (b) the contribution of OD, η_O; (c) the contribution of AD, η_A; and (d) the combined resistivity, η(r, z) = η_O(r, z)+η_A(r, z), are plotted for our reference model, which is explained in Sect. 3.1 (cf. Table 2). The dashed gray lines in (a)–(d) correspond to specific heights above the disk midplane (z = 0, z = H_p, $z=H_{\mathrm{p}}+\frac{1}{3}(z_{\mathrm{B}}-H_{\mathrm{p}})$, $z=H_{\mathrm{p}}+\frac{2}{3}(z_{\mathrm{B}}-H_{\mathrm{p}})$, and z = z_B). In (e) the combined resistivity is plotted for those specific heights, as well as the resulting vertically averaged resistivity $\overline{\overline{\eta }}$ (thick blue line). For comparison the turbulent resistivity, η_t, corresponding to a Prandtl number of 1 is also plotted, showing that ${\eta }_{\mathrm{t}}\ll \overline{\overline{\eta }}$ almost everywhere except for the very inner region.