Fig. 4: Spatial pattern of simulated ΔEF and adjusted global cropland N2O EFs.
From: Legacy effects cause systematic underestimation of N2O emission factors
a ΔEF is predicted with the quadratic model weighted by similarity. b adjusted global cropland N2O EFs based on Tier 1 methodology. c adjusted global cropland N2O EFs based on Cui et al. 8. EFs, N2O emission factors; ΔEF, the difference in EFs between long-term and short-term N fertilization. Values are shown only where the proportion of harvested area within the grid cell is greater than 1%. The map images were generated using MATLAB R2023a.
