Table S4.

Results of sensitivity analysis varying geologic forcing factors with or without early plant forcing scenario

Forcing scenarioUpliftDegassingBiologyFOrg-C, mol/yΔδ13C, ‰ΔCO2, PALΔO2, PAL
445 Ma445 Ma445 Ma410 Ma
Original baselineBBB4.1 × 1012000
New baselineRRB4.4 × 1012−0.1−1.3−0.01
Strong upliftR + 20%RB4.7 × 1012−0.2−3.3−0.04
Weak upliftR − 20%RB4.1 × 10120.01.40.03
Strong degassingRR + 20%B5.0 × 10120.00.80.04
Weak degassingRR − 20%B3.8 × 1012−0.2−3.7−0.05
Strong U, weak DR + 20%R − 20%B4.0 × 1012−0.3−5.4−0.08
Weak U, strong DR − 20%R + 20%B4.7 × 10120.13.80.08
Original baselineBBE + W + F(i)8.0 × 10122.2−8.40.74*
New baselineRRE + W + F(i)8.3 × 10122.0−9.60.72
Strong upliftR + 20%RE + W + F(i)8.9 × 10121.7−110.60
Weak upliftR − 20%RE + W + F(i)7.6 × 10122.3−8.00.85
Strong degassingRR + 20%E + W + F(i)9.5 × 10122.3−8.30.89
Weak degassingRR − 20%E + W + F(i)7.1 × 10121.7−110.51
Strong U, weak DR + 20%R − 20%E + W + F(i)7.5 × 10121.4−120.40
Weak U, strong DR − 20%R + 20%E + W + F(i)8.7 × 10122.6−6.51.01
  • B, baseline; R, Royer et al. (91).

  • * With the original geologic forcing, this peak increase in O2 occurs earlier at 417 Ma.