TABLE 1.
Model parameters fitting the Phanerozoic
| Parameter | Meaning | Scotese model | Present model | Significance |
|---|---|---|---|---|
| ΔT×2 | Sensitivity to CO2 doubling | 1.52 ± 0.3°C | 1.67 ± 0.22°C | 7.6 σ |
| λ | Sensitivity to solar flux | 0.96 ± 0.09°C/Wm2 | 0.89 ± 0.16°C/Wm2 | 10.2 σ |
| α | Solar warming to CO2 ratio | 1.95 ± 0.25 | 1.91 ± 0.12 | |
| ΔTbias | Indirect CO2 bias of δ18O | − | −0.07 ± 0.62 | |
| Along | Large oscillation/amp. | 7.2 ± 0.8°C | 6.8 ± 0.4°C | 16.7 σ |
| Plong | Large oscillation/period | 140.2 ± 1.7 Ma | 140.0 ± 0.8 Ma | |
| ϕlong | Large oscillation/phase | 214 ± 9° | 220 ± 5° | |
| Ashort | Short oscillation/amp. | 2.6 ± 0.4°C | 2.6 ± 0.3°C | 7.9 σ |
| Pshort | Short oscillation/period | 32.7 ± 0.8 Ma | 30.7 ± 0.7 Ma | |
| Pshort | Short oscillation/phase | 203 ± 50° | 117 ± 40° | |
| A2nd | Modulation/amp. | 18.4 ± 8°C | 21.6 ± 7°C | 3.0 σ |
| P2nd | Modulation/period | 181.5 ± 6 Ma | 175 ± 3 Ma | |
| ϕ2nd | Modulation/phase | 80 ± 48° | 66 ± 61° |
Note: Errors are 1–σ ranges.