Our chosen location is within the Amundsen Gulf, in the Western Canadian Arctic shelf, with a bottom depth of 550 m in the center of the canal. At the south-east of the Beaufort Sea, the Amundsen Gulf is bounded to north by Banks Island and Franklin and Darnley bays to the south and connects the Beaufort sea and the Mackenzie Shelf to the Canadian Arctic Archipelago (Figure maps Christiane). The region exhibit three water masses different in their origin: A low salinity Polar-Mixed Layer (salinity < 31.6, from 0-50m) resulting from the mix of melted sea-ice and sea-water; an intermediate Pacific Halocline (32.4 < salinity < 33.1, 50-200m) coming from the Pacific Ocean through the Bering strait and the deep and warm Atlantic Waters (salinity > 34, > 200m) that flowed along the whole Arctic shelf (Carmack and MacDonald, 2002).