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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Atmospheric oxygenation of the early earth and earth-like planets driven by competition between land and seafloor weathering

Fig. 2

Relationship between climate warmings and riverine phosphorus supply rate. Response of A the surface temperature (K); B atmospheric CO2 level (present atmospheric level; PAL); C continental/seafloor weathering rate (Tmol year–1) (solid line/dot-dashed line), and D the riverine phosphorus supply rate (1011 mol year–1) to CO2-induced warming at a fixed pCH4 (blue: 1.00 × 10–6 (bar), black: 1.00 × 10–4 (bar), red: 3.00 × 10–3 (bar)). Similarly, response of E the surface temperature (K); F atmospheric CO2 level (PAL); G continental/seafloor weathering rate (Tmol year−1), and H the riverine phosphorus supply rate (1011 mol year−1) to CH4-induced warming at a fixed CO2 outgassing rate (blue: 6.7 Tmol year–1, black: 13.4 Tmol year–1, red: 20.1 Tmol year–1). These calculations are conducted with solar luminosity (83% of present Earth), seafloor spreading rate (1.307 times the present rate), soil biological activity (fe = 0.15), and present continental area (fa = 1)

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