Fig. 11

MFT-induced color change (ΔE₀₀) (a) and rate of color change \((\frac{\partial \Delta {E}_{00}}{\partial t})\) (b) after 600 s. The two metrics are plotted as a function of the other in (c) with Sainte-Victoire (●), Foliage (▲), and Study of Trees (■). Dashed lines indicate the limits of the BWS categories as defined in Table 2. The fitted ΔE₀₀ and \(\frac{\partial \Delta {E}_{00}}{\partial t}\) for BW2 and BW3 are indicated by ( +)