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Marine ecosystem role in setting up preindustrial and future climate

Author

Listed:
  • Jerry F. Tjiputra

    (Bjerknes Centre for Climate Research)

  • Damien Couespel

    (Bjerknes Centre for Climate Research)

  • Richard Sanders

    (Bjerknes Centre for Climate Research)

Abstract

The ocean ecosystem is a vital component of the global carbon cycle, storing enough carbon to keep atmospheric CO2 considerably lower than it would otherwise be. However, this conception is based on simple models, neglecting the coupled land-ocean feedback. Using an interactive Earth system model, we show that the role ocean biology plays in controlling atmospheric CO2 is more complex than previously thought. Atmospheric CO2 in a new equilibrium state after the biological pump is shut down increases by more than 50% (163 ppm), lower than expected as approximately half the carbon lost from the ocean is adsorbed by the land. The abiotic ocean is less capable of taking up anthropogenic carbon due to the warmer climate, an absent biological surface pCO2 deficit and a higher Revelle factor. Prioritizing research on and preserving marine ecosystem functioning would be crucial to mitigate climate change and the risks associated with it.

Suggested Citation

  • Jerry F. Tjiputra & Damien Couespel & Richard Sanders, 2025. "Marine ecosystem role in setting up preindustrial and future climate," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57371-y
    DOI: 10.1038/s41467-025-57371-y
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