Top: carbon-to-oxygen ratio, C/O (dashed horizontal line: solar C/O). Bottom: degree of ionisation, f_e = p_{gas, tot}∕p_e (dashed horizontal line: f_e = 10⁷ as a threshold value for plasma behaviour). C/O and f_e are shown for all 1D profiles studied here for the atmosphere of WASP-43b. The nightside profiles are shown in blue, the dayside profiles in orange, the terminator profiles in grey.