The Eighty-First Parallel North is a circle of latitude located 81 degrees north of the equator. It runs through the Arctic region, primarily over the Arctic Ocean and parts of the surrounding sea ice. This parallel is significant for navigation and climate studies, as it marks a boundary where temperatures are extremely low and daylight varies dramatically throughout the year. Geographically, the Eighty-First Parallel North is close to the North Pole, making it one of the northernmost latitudes on Earth. It intersects with various territories, including parts of Greenland and the Arctic Ocean. This area is largely uninhabited, with few research stations and limited human activity due to harsh environmental conditions.