One Ocean Science Congress 2025

The Ocean is under threat from combined pressures such as climate change, overfishing, pollution, and conflicting uses. It is also a source of solutions, for example to mitigate and adapt to climate change.The Ocean urgently needs decisive, swift, and unified efforts to address its critical condition and maximize the solutions it offers. This presents a major challenge for the global community at the Third United Nations Conference on the Oceans (UNOC3), to be held in Nice from 9 to 13 June 2025. The goal is to spur action and implement SDG 14, which is the least funded of all Sustainable Development Goals.

CNRS and IFREMER have been tasked with organizing the One Ocean Science Congress (OOSC), a UNOC3 Special Event dedicated to Science, and to provide Heads of State, Government, and the broader society, with comprehensive scientific insights on the Ocean's health and future trajectory. Science-informed decisions should enable the conservation and sustainable use of the Ocean, optimize the solutions it offers, and safeguard the services and benefits it provides to humanity.

The Congress will feature a mix of plenary sessions, including opening and keynote speeches, alongside parallel oral and poster presentations. To enhance interactions between science and society, action and policy, and to engage civil society more broadly, 'townhalls' such as panels and roundtables will also be arranged.

Programme

Blue-Cloud at the Event

At the One Ocean Science Congress 2025, the Blue-Cloud 2026 project will be featured in a presentation by Aljaz Maslo (EMSO-ERIC) during the session T10-2 – Research Infrastructure to Sustain, Expand, and Share Ocean Observations, Data, Monitoring, and Modelling, taking place on Thursday, 5 June at 09:30 in Room 8. The talk, titled “Advancing Deep-Sea Science with Long-Term Ocean Observations”, will highlight how EMSO ERIC’s deep-sea monitoring activities support the harmonisation and integration of marine data, in line with Blue-Cloud 2026 Work Package 2 objectives.

Additional contributions from the Blue-Cloud ecosystem include:

• Alessandra Giorgetti (OGS) – presenting on EMODnet Chemistry.

• Marco Taconet (FAO and Blue-Cloud ESEB member) - presenting FAO partnerships and Virtual Research Environments to support global monitoring of state of fishery stocks. Marc' presentation mentioned FAO's work with IRD and FORTH (Blue-Cloud 2026 partners) within the Virtual Lab Global Fisheries Atlas. 

• Deniz Karaca (EuroGOOS) – digital poster presentation titled “Blueprint for Integrated Ocean Science (BIOS): Advancing Harmonized Observation Systems and Policy Coordination for Sustainable Ecosystem Management”, presented across 3–5 June. The poster will include references to Blue-Cloud 2026, linking Essential Ocean Variables (EOVs) and Virtual Labs between the BIOS and Blue-Cloud projects, with selected examples from BC2026.

• Jay Pearlman (OBPS) – contributing with accepted abstracts, with coordination across relevant sessions.