Beaufort Sea references the Beaufort Sea in his popular Canadian Folk Song Northwest Passage (song). Beaufort Sea The Beaufort Sea () is a marginal sea of the Arctic Ocean, located north of the Northwest Territories, the Yukon, and Alaska, and west of Canada's Arctic islands. The sea is named after Sir Francis Beaufort, a hydrographer. The Mackenzie River, the longest in Canada, empties into the Canadian part of the Beaufort Sea west of Tuktoyaktuk, which is one of the few permanent settlements on the sea shores. The sea, characterized by severe climate, is frozen over most of the year. Historically, only a
Milky seas effect than the traditional blue or white milky seas effect seen by the rest of the world. It is not known whether this difference depends on the area, or simply a perception of a cyanic colour as being green. The phenomenon is known as "mareel" in Shetland. This term is derived from the Norn word "*mareld", which is itself derived from the Old Norse word "mǫrueldr", which is a compound of "marr" (mere, sea) and "eldr" (fire). Milky seas effect Milky seas, also called mareel, is a luminous phenomenon in the ocean in which large areas of seawater (up to )