Denmark Strait

The Denmark Strait separates Greenland from Iceland and links the Greenland Sea with the Irminger Sea. Its narrowest span lies between Straumnes on Iceland's Hornstrandir peninsula and the Blosseville Coast of Greenland. A shallow submarine ridge crosses the passage, forcing deep, cold Polar water to plunge westward toward the Atlantic. The East Greenland Current follows the coast and carries pack ice and icebergs into southern waters.

Norse seafarers crossed this northern ocean during the medieval settlement of Iceland and Greenland. The passage remained hazardous because ice, fog and sudden weather could close a route that appeared open on a chart. Drift ice narrowed the usable water and carried hunters and whalers far from shore. The surrounding seas supported seals, fish and whales, attracting crews from northern Europe by the seventeenth and eighteenth centuries.

Whaling ships required sturdy vessels, skilled ice navigation and protected harbours on the Icelandic and Greenland coasts. The strait also shaped the movement of goods between the North Atlantic settlements and Europe, while its current carried floating hazards southward. Access depended on the season and the position of the ice edge. The Denmark Strait therefore became a strategic corridor between two large islands, defined less by fixed shores than by currents, depth and changing sea ice.