The Faint Young Sun Paradox: A Simplified Thermodynamic Approach

Table 4

Possible scenarios of ancient surface temperatures for Mars under maximum ecological function conditions.

Albedo 𝜌	Greenhouse coefficient 𝛾	Solar constant 𝑆/𝑆0 (normalized)	Time BP (Gyr)	Surface temperature, 𝑇1 (K)
0.0	0.2	0.9	1.277	273.4
0.0	0.3	0.8	2.875	273.9
0.1	0.3	0.9	1.310	274.0
0.1	0.4	0.9	3.631	273.1
0.2	0.3	0.99	0.116	273.2
0.2	0.4	0.86	1.872	273.4
0.2	0.5	0.73	4.25	273.7
0.3	0.4	0.98	0.234	273.2
0.3	0.5	0.83	2.355	273.3
0.4	0.6	0.8	2.875	274.1