Absorption of anthropogenic CO₂ by seawater: CO₂ + H₂O ⇌ H₂CO₃ ⇌ HCO₃⁻ + H⁺; ocean pH has dropped from ≈8.2 to ≈8.1 since pre-industrial, reducing CaCO₃ saturation and threatening calcifiers.
Absorption of anthropogenic CO₂ by seawater: CO₂ + H₂O ⇌ H₂CO₃ ⇌ HCO₃⁻ + H⁺; ocean pH has dropped from ≈8.2 to ≈8.1 since pre-industrial, reducing CaCO₃ saturation and threatening calcifiers.