Temperature map at t = 2 Gyr for the heat conduction in a 2D magnetic loop with AMR and different fractions of perpendicular conductivity coefficients κ_iso = 0.1κ_Sp (red contours), κ_iso = 0.01κ_Sp (grey levels and white contours), and κ_iso = 0.001κ_Sp (blue contours). Two contours are plotted for each simulation result corresponding to temperatures T = 5 × 10⁶ K and T = 10⁷ K (except for κ_iso = 0.1κ_Sp where only T = 5 × 10⁶ K is reached).