Fig. 4.

Maps of Pearson’s correlation coefficient (r) between weekly satellite-based DI′ and RZM′ after fitting with Eq. (2); the first variable listed is the fitted parameter (fit by a scaled and shifted version of the second variable): a) FPET′ fitted using RZM′; b) NDVI′ fitted using RZM′; c) NDII′ fitted using RZM′. d) FPET′ fitted using NDVI′; and e) NDII′ fitted using NDVI′. Left: all gridboxes with valid data; Right (f–j): only for gridboxes with p-values < 0.00001 (all other gridboxes with valid data shown in gray).