Figure 2.

Evolution of ${\mathrm{RH}}_{\mathrm{h}}$. Trajectories of sensors located at equivalent positions in the apse vault are depicted in the same chart (data recorded between 15 January and 4 July 2008): cornice and ribs ($\mathcal{R}\mathcal{C}$) (a), walls ($\mathcal{W}$) (b), and frescoes ($\mathcal{F}$) (c). Likewise for data collected between 22 February and 18 July 2010: $\mathcal{R}\mathcal{C}$ (d), $\mathcal{W}$ (e), and $\mathcal{F}$ (f). Separation by seasons (Wr, Sp and Sm) is indicated by means of vertical solid lines. Wr is divided into two periods (dashed line) because a structural break was identified according to the supF and CUSUM tests.