Figure 7.12. Model projections of the neutralization of anthropogenic CO₂ for an ocean-only model, a model including dissolution of CaCO₃ sediment and a model including weathering of silicate rocks, (top) for a total of 1,000 GtC of anthropogenic CO₂ emissions and (bottom) for a total of 5,000 GtC of anthropogenic CO₂. Note that the y-axis is different for the two diagrams. Without CaCO₃ dissolution from the seafloor, the buffering of anthropogenic CO₂ is limited. Even after 100 kyr, the remaining pCO₂ is substantially higher than the pre-industrial value. Source: Archer (2005).