Normalized response functions to temperature perturbations at selected frequencies and pixels in the simulation box. Top row: response functions to temperature of Mg II h and k and Ca II 8542 Å at the same locations given in Fig. 6.; the solid line traces the maximum at each column. Bottom row: normalized responses at 1.2 mm (solid line) and 3 mm (dashed line), and model temperature (dotted line) at those locations.