Different climate states as a function of time and planetary distance a. The colors have the same meanings as in Figure 9. The four panels show differences in the initial outgassing rate G₀ compared to that on modern Earth. Panels (a)–(d) use G₀ = 30, 10, 3, and 1, respectively. In all cases, W_L0 = W_S0 = 1/6. The values of other model parameters are the same as in Figure 9.