Fig. 5From: Conservation risks for paper collections induced by the microclimate in the repository of the Alessandrina Library in Rome (Italy)Hourly distribution of vertical temperature gradients (ΔT/Δz, where ΔT = − (T4-T3) compared with the dry adiabatic gradient of temperature of − 0.1 °C/10 m: unstable (red), neutral (white) and stable (blue) conditionsBack to article page