What kind of research priorities should be taken into account in establishing a framework for international collaboration in the next decades? This briefing highlights the importance of connected, interdisciplinary long‐term science and ocean monitoring to understand global physical systems, make predictions and inform future policy. This briefing document was produced for a side event organised as part of the All-Atlantic 2021 conference on 2nd June 2021, as an online event. The side event was organised by four Horizon 2020 projects: Blue-Action, MISSION ATLANTIC, SO-CHIC and TRIATLAS. Presentations and recordings: https://zenodo.org/record/4893616

The Blue-Action, MISSION ATLANTIC, SO-CHIC, and TRIATLAS projects have received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 727852, 862428, 821001, 817578 respectively.