Nordic heat pump - (n.)

The Nordic heat pump is a feature associated with the production of North Atlantic Deep Water, made in the regions east and west of southern Greenland. Here surface water is cooled and sinks after it has given up much of its heat. It is then replaced by more warm water from the south. Cold deep water is exported from the region in return for the warm water imported. This process helps stabilize the Iceland Low, which in turn helps drive warm winds into the northern North Atlantic. See also “Atlantic Heat Conveyer.”