Biography：
Jean-Pierre Gattuso is CNRS Scientist at Sorbonne University and the Institute for Sustainable Development and International Relations. He studies the effects of global change on marine ecosystems and their services. He also investigates ocean-based solutions to mitigate and adapt to climate change. He coedited the first book on ocean acidification and contributed to several IPCC products.
Abstract：
I will review the outcomes of the One Ocean Science Congress and its strategic alignment with the Third United Nations Ocean Conference (UNOC3) as a case study in ocean science diplomacy. Convened in June 2025 in Nice, France, as a UN Special Event immediately preceding UNOC3, the OOSC introduced an innovative model for multilateral conferences by providing a direct channel for transmitting science-based recommendations to policymakers. This sequencing sought to ensure that political deliberations were anchored in the most current knowledge. The extent to which OOSC outputs influenced UNOC3 discussions and outcomes is analyzed. While causality cannot be firmly established, evidence shows that 44 of the 60 OOSC recommendations are reflected in UNOC3 documents, indicating substantial uptake. Notable alignments include recognition of the importance of international cooperation in ocean research and the inclusion of indigenous knowledge systems in governance frameworks. Voluntary commitments, such as a precautionary pause on deep-sea mining, further mirrored OOSC's core messages. My conclusion will be that the OOSC–UNOC3 sequence demonstrates the potential of strategically timed, policy-ready scientific inputs to enhance the science–policy interface. Interest from future UNOC hosts in replicating this approach underscores its promise as a model for embedding science into high-level ocean governance.
Gattuso J.-P., Houllier F., Butel M. & Sanchez W., 2025. Ocean science meets diplomacy: Contribution of the One Ocean Science Congress to the Third United Nations Ocean Conference. Limnology and Oceanography Bulletin.
