Water masses as determined from salinity, temperature, and nutrient concentrations. T-S plots with absolute salinity and conservative temperature; σ_θ isolines in gray, freezing point relation at 0 dbar as thick, black line. A: Color scale indicates water depth of measurement. B: The shaded areas represent water mass definitions; ArW: Arctic Water, AW: Atlantic Water, WAW: Winter Atlantic Water. The color scale indicates ANP following Newton et al. (2013). DOI: https://doi.org/10.1525/elementa.357.f6