North Atlantic Deep Water
The North Atlantic Deep Water (North Atlantic Deep Water - NADW ) is next to the Antarctic bottom water is one of two deep-water main currents of global conveyor belt. The cold and dense water formed in the area Greenland / Norwegian Sea, where waters of the North Atlantic current cools and sinks to the bottom.
To get back in the open Atlantic, the water must overcome the Greenland - Scotland Ridge, which separates the Norwegian Sea from the Atlantic Ocean. It is pressed from the North Sea basin via the Denmark Strait and the Faroe Bank Channel. On the other side of the back, it falls like a submarine waterfall several hundred to a thousand feet in depth, which is mixed by the turbulence with adjacent water layers. The resulting water is very dense and flows with 16 to 18 Sverdrup over the Antarctic deep water to the south. After about 1000 years it reaches the Antarctic.