Fig. 2: Spatial variability of soil carbon turnover time inferred from observations.

Maps of a observed soil carbon (C_s) to a depth of 1 m (kg C m⁻²)^19,20, b observed heterotrophic respiration (R_h,0) (kg C m⁻² yr⁻¹)²¹, and c inferred soil carbon turnover time (\(\mathrm{log}\,{\tau }_{{\rm{s}}}\)) (yr).