"In September 2017 I joined the Norwegian Polar Institute on a research survey across the Fram strait. Fram strait is the deep passage between Spitsbergen archipelago and Greenland and serves as the main transport way for water leaving the Arctic Ocean to enter the North Atlantic. The survey has been performed in a more or less standardised manner since 2009, with the aim to investigate physical and chemical properties of the waters that flow through this critical location. I was investigating the latter. When looking at changes in global climate systems, knowledge on the dynamics in this geographical location is of particular relevance, since the deep-water formed in the North Atlantic, as heavy brine from the Arctic mixes with cold sinking water around Iceland, is the central driver for maintaining the global ocean circulation and has been identified as one of the global tipping points in Earth’s climate systems."