Table 1.

Abiotic inputs of CO₂, H₂, CH₄ and H₂SO₄.

Abiotic inputs	Range (in molecules cm−2 s−1)	Reference
Volcanic output of CO2	1.2 × 1010– 4 × 1010 (to obtain TGeo ranging from 0 to 20 °C)	ref. 5
Volcanic output of H2	5 × 109–3 × 1011	ref. 12
Serpentinization rate of production of CH4	3.7 × 108–3.7 × 109	ref. 33,42
Deposition rate of H2SO4	107–109	ref. 30