Fig. 1.

(Top row) Cumulative total terrestrial and peatland C storage change since 11 kyBP. Uncertainty ranges (shading) are given for $\mathrm{\Delta }{\mathrm{C}}_{\text{tot}}$ and YML-$\mathrm{\Delta }{\mathrm{C}}_{\text{peat}}$ and represent 1 SD around the mean (thick line). LPX-$\mathrm{\Delta }{\mathrm{C}}_{\text{peat}}$ is the change in global total C stored in peat soils, represented by annual values (thin line) and their smoothing spline (thick line). Measured atmospheric CO₂ is included at a separate y axis (Right) as gray and beige circles and their smoothing splines for records spanning the Holocene (“CO₂ EPICA”, Left) (69) and the last millennium [“CO₂ Law Dome” (70) and “CO₂ WAIS” (40), Right]. (Bottom row) Cumulative budget residual (mean, $\pm$1 SD) based on the difference between YML-$\mathrm{\Delta }{\mathrm{C}}_{\text{peat}}$ data and simulated cumulative land-use change emissions for each scenario. The pale-colored ranges for HYDE 3.1 and 3.2 represent the “HYDE 3.1 upper” and “HYDE 3.2 upper” scenarios, respectively. The gray band around 0 represents the interannual variability of land C storage as simulated by LPX. EPICA, European Project for Ice Coring in Antarctica; WAIS, West Antarctic Ice Sheet.