FRESH-CARE (Unraveling FRESHwater and ocean Currents changes in the Arctic using REmote sensing) is an ERC-funded project that aims to improve our understanding of Arctic freshwater dynamics and ocean circulation under rapid climate change. The project combines satellite observations, in situ hydrographic data, ocean reanalyses, artificial intelligence, and coupled ice–ocean modelling to reconstruct and analyze the four-dimensional state of the Arctic Ocean. A central goal is to better quantify temperature, salinity, dynamic height, ocean currents, freshwater content, and freshwater transports across the main Arctic gateways, including the Bering, Davis and Fram straits and the Barents Sea Opening. By producing observation-constrained Arctic reconstructions and future scenario simulations, FRESH-CARE seeks to reduce uncertainties in freshwater flux estimates and provide improved datasets for polar oceanography, climate research, and Earth system modelling. The project ultimately contributes to assessing the role of Arctic freshwater in global climate variability.