Towards quantification of the subpolar North Atlantic circulation

It is well known that ocean circulation impacts climate and weather patterns. One of the key regions influencing Europe is the subpolar North Atlantic, Here warm and saline water from the subtropics is imported with the North Atlantic Current (NAC), meeting cold and fresh water masses intruding from the north. To quantify the strength of the NAC, Uni Bremen and BSH Hamburg started in 2006 to continuously deploy instruments to quantify the volume transport. In a first step, the crossing of the NAC from the western into the eastern basin at the western flank oft the Midatalantic Ridge was covered, followed by boundary current moorings and PIES at a nominally zonal section at 47N in the western basin. In the last years, PIES and moorings have also been deployed in the eastern basin. Here we report about the recent results, focusing on the eastern basin.