Table 1.
Overview of the Ensemble of Boundary Conditions for the Climate Model Simulations
| Pathway P | Timeslices | pCO2 (ppm) | S0 (W/m2) | Vegetation pattern | |
|---|---|---|---|---|---|
| Baseline (fixed pCO2; increasing S0; changing paleogeography and heterogeneous vegetation patterns) | |||||
| P pCO2_1000ppm | T 5Myr | 1,000 | 1,333–1,355 | VegHet | |
| Sensitivity: pCO2 (two different pCO2 reconstructions, see Figure 1b; additional constant pCO2 pathways) | |||||
| P pCO2_proxy | T 5Myr | Foster et al. (2017) fit to proxy data | 1,333–1,355 | VegHet | |
| P pCO2_COPSE | T 5Myr | Mills et al. (2019) COPSE model | 1,333–1,355 | VegHet | |
| P pCO2_const | T 25Myr | [250, 500, 1,500, 2,000, 4,000] | 1,333–1,355 | VegHet | |
| Sensitivity: Solar Constant (S0 fixed at value at 255 Ma) | |||||
| P S0ini | T 25Myr | 1,000 | 1,333 | VegHet | |
| Sensitivity: Homogeneous Vegetation Patterns (avg. composition of VegHet for individual timeslice [→ VegHom] or over all timeslices [→ VegFix]) | |||||
| P VegHom | T 25Myr | 1,000 | 1,333–1,355 | VegHom | |
| P VegFix_S0ini | T 25Myr | 1,000 | 1,333 | VegFix | |
| Sensitivity: Orbital Configuration | [obl., ecc., prec.] | ||||
| P orb | T 25Myr | 1,000 | 1,333–1,355 | VegHet | [22.0°, 0.00, 0°] |
| [24.5°, 0.06, | |||||
| 90/180/270°] | |||||
| Sensitivity: Sea Level (modified elevations and land‐sea masks) | Sea‐Level Offset (m) | ||||
| 200 Ma | 1,000 | 1,339 | VegHom | [+40, +200] | |
| PSL | 150 Ma | 1,000 | 1,344 | VegHom | [−40, +40] |
| 100 Ma | 1,000 | 1,350 | VegHom | [− 200, −40, +40] | |
Note. See Section 2.2 for further explanation.