Qualitative illustration of the reflation mechanism, comparing the standard atmospheric evolution observed in oxidized atmospheres (top) and reflation events (bottom) observed in reduced atmospheres. Oxidized super-Earths would experience monotonic deflation as their secondary atmospheres are heavy, while reduced interiors favor transient reflation events, arising from the transition from a carbon-rich CO-dominated atmosphere, to an H₂-dominated atmosphere by outgassing from the interior.