New constraints on terrestrial and oceanic global gross primary production from atmospheric CO₂ and O₂ triple oxygen isotopes

Plain-language summary

This work extends the isotope-based carbon-cycle framework by jointly considering atmospheric CO₂ and O₂ triple oxygen isotopes to constrain terrestrial and oceanic global gross primary production.

Why this work matters

• Uses an independent isotope perspective on global productivity.
• Separates terrestrial and oceanic contributions within an integrated framework.
• Creates a bridge between isotope geochemistry, atmospheric observations, and Earth-system modeling.

This website summary is interpretive and should be checked against the final article for methods, assumptions, quantitative results, and limitations.