Research Article
The Faint Young Sun Paradox: A Simplified Thermodynamic Approach
Table 2
Possible scenarios of ancient surface temperatures under maximum ecological conditions. For the first row data
was considered.
| Albedo | Greenhouse coefficient | Solar constant (normalized) | Time BP () | Surface temperature, () |
| 0.17 | 0.06 | 0.7-0.8 | 4.5–3.6 | 293.6–303.6 |
| 0.40 | 0.0 | 0.81 | 2.297 | 273.1 | 0.1 | 0.73 | 4.253 | 273.0 |
| 0.45 | 0.0 | 0.88 | 1.568 | 273.1 | 0.1 | 0.80 | 2.875 | 273.2 | 0.15 | 0.76 | 3.631 | 273.4 | 0.20 | 0.71 | 4.697 | 273.7 |
| 0.50 | 0.1 | 0.88 | 1.568 | 273.2 | 0.15 | 0.83 | 2.355 | 273.3 | 0.20 | 0.79 | 3.056 | 373.5 | 0.25 | 0.74 | 4.045 | 273.1 |
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