Fig. 2.

Land C budget in the Holocene for five 2-ky periods (Left) and the last millennium for seven periods of unequal length (Right), also shown as mean annual fluxes (Center). Positive values represent land C uptake. Shown is total global change in land C ($\mathrm{\Delta }{\mathrm{C}}_{\text{tot}}$) as inferred from the CO₂ and ${\delta }^{13}$C ice-core records (green bars) (10, 17). Peatland C balance ($\mathrm{\Delta }{\mathrm{C}}_{\text{peat}}$) is shown as derived from YML data (blue bars) and LPX simulations (black circles). “Other processes” show the budget residual $\delta$, using YML-derived $\mathrm{\Delta }{\mathrm{C}}_{\text{peat}}$ (brown bars and black whiskers for their uncertainty) and using LPX-derived $\mathrm{\Delta }{\mathrm{C}}_{\text{peat}}$ (brown circles and whiskers). Cumulative emissions from LUC are given for each period and scenario (thin bars). Light-colored thin bars represent alternative scenarios where upper-end assumptions for population counts are used for HYDE 3.1 and 3.2. Light-colored bars behind KK10D represent the original KK10 scenario.