The Rockall Trough (RT, Figure 1) serves as a key pathway for the poleward transport of oceanic heat, salt, carbon and nutrients. In the eastern subpolar North Atlantic (SPNA) the North Atlantic Current (NAC) consists of several branches with the southeastern branch, the warmest and saltiest, flowing through the RT. In addition, Eastern North Atlantic Water flows from the Bay of Biscay into the RT along the continental shelf break in the European Slope Current (ESC) (
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