The flow through and over the 600 m sill depth in the Denmark Strait between Iceland and Greenland. This is thought to be around 3.0 Sv of which 2.5 Sv is Arctic Intermediate Water and 0.5 Sv is Upper Polar Deep Water. The mixture of these water masses after they pass the strait is called Northwest Atlantic Bottom Water (NWABW). This is the coldest and densest of the source waters for North Atlantic Deep Water and is characterizied by a salinity minimum.