IPCC Fourth Assessment Report: Climate Change 2007 Climate
Change 2007: Working Group I: The Physical Science Basis Figure
7.12  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).