Fig. 4: Sources of uncertainty in forest carbon potential for the GS and SD models.
From: Integrated global assessment of the natural forest carbon potential
a,b, Relative contribution of individual uncertainty sources to the overall uncertainty in carbon potential for the GS (a) and SD (b) models: (1) model approach (type 1 versus type 2 models); (2) input data (current aboveground tree carbon input, that is, upper and lower canopy cover boundaries for GS models and ESA-CCI, Walker et al.2 and harmonized for SD models); (3) aboveground biomass potential estimates (bootstrapping); (4) belowground biomass (accounting for uncertainties in both root mass fraction and aboveground biomass); (5) dead wood and litter (accounting for uncertainties in both dead wood and litter-to-tree biomass ratios and tree biomass); and (6) soil organic carbon potential23. The maps show the top uncertainty source within each pixel. The pie charts show the relative contribution of uncertainties worldwide.
