Different climate states as a function of the relationship between seafloor weathering and outgassing. The colors have the same meanings as in Figure 9. In each panel, the seafloor-weathering rate is proportional to Gⁿ, where G is the outgassing rate. Panels (a)–(d) use n = 0, 0.5, 1, and 2, respectively. In all cases, the outgassing rate declines exponentially over time with G₀ = 5.