Fig. 6: Combined effect of age of frontier, drought, and air dryness on frontier-related fire.
From: The time since land-use transition drives changes in fire activity in the Amazon-Cerrado region
The influence of MCWD (a–d, i–l) and VPD (e–h, m–p) on fire induced by conversion of forest to pasture increases with the extent of burned area in the Amazon (a–h) and Cerrado (i–p) biomes. The curved response line was estimated based on a GAM using an adaptive Gaussian kernel smoothing method. Extents of burned area, MCWD (drought) and VPD (air dryness) classes are defined by quartile intervals. Supplementary Fig. 9 provides the midpoint value for each quartile of MCWD and VPD in the Amazon and Cerrado, encompassing all classes of burned area extent for each biome (here the class intervals are determined for different subsets by extents of burned area). Note that the classes for MCWD are “inverted” due to its negative values, where more negative values indicate higher levels of dryness.
