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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

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

Fig. 4

Response of the system against continental growth with Archean-like ecosystem. The dependence of A pCO2, B surface temperature, C pO2 (PAL), and D CH4/CO2 ratio on the continental area, calculated in the case of high primary productivity of the anaerobic photoautotrophs (Fred = 2.00 × 1013 mol C year–1), bioavailable fraction of the riverine phosphorus (γbio = 1), solar luminosity (83% of the present Earth), seafloor spreading rate (1.307 times the present rate), and soil biological activity (fe = 0.15). Dependence on continental area for 1, 2, 3, 4, and 5 times the present CO2 outgassing rate are shown with blue, cyan, grey, pink, and red lines, respectively

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