EGU24-723, updated on 08 Mar 2024
https://doi.org/10.5194/egusphere-egu24-723
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Distribution and valuation of the biological carbon pump and its carbon sequestration:  Implications for international area-based management and climate finance

Fabio Berzaghi1, Jerome Pinti2, Olivier Aumont3, Olivier Maury4, and Mary Wisz1
Fabio Berzaghi et al.
  • 1Ocean Sustainability, Governance and Management, World Maritime University, Malmö, Sweden
  • 2College of Earth, Ocean, and Environment, University of Delaware, Lewes, USA
  • 3Laboratoire d'Océanographie et du Climat: Expérimentation et Approches Numériques (LOCEAN), IPSL, CNRS/UPMC/IRD/MNHN, Paris, France
  • 4IRD (Institut de Recherche pour le Développement), UMR 248 MARBEC (IRD- IFREMER-CNRS-Université Montpellier), Montpellier, France

Marine organisms, from plankton to fish, provide a wealth of ecosystem services, including carbon sequestration in a process known as the ocean’s biological carbon pump (BCP). The BCP brings carbon from the atmosphere to the ocean depths where it is stored for decades to centuries. Although parts of the ocean’s BCP are under threat from human activities,  BCP carbon sequestration rarely features as an objective in efforts to protect ocean spaces. Moreover, although BCP carbon sequestration services could support discussions of conservation and climate finance,  its economic value has yet to be estimated in space and time.

Biogeochemical modeling and mapping efforts have grown in recent years, and emerging results could potentially help to fill in important spatially explicit and economic knowledge gaps that could inform the protection of the BCP. We developed a new metric to map and quantify the global ocean’s BCP long-term carbon sequestration and computed its value on a potential carbon market. We show the  global spatial patterns and valuation in relation to geopolitical and management boundaries, and highlight options for governance and management. Our results highlight potential opportunities for preserving the climate services of the BCP both nationally and in areas beyond national jurisdiction , and can be used to inform discussions about marine protected areas, environmental impact assessment, and conservation finance.

How to cite: Berzaghi, F., Pinti, J., Aumont, O., Maury, O., and Wisz, M.: Distribution and valuation of the biological carbon pump and its carbon sequestration:  Implications for international area-based management and climate finance, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-723, https://doi.org/10.5194/egusphere-egu24-723, 2024.