Arctic Ocean deepest point is Litke Deep in the Eurasian Basin, at . The two major basins are further subdivided by ridges into the Canada Basin (between Alaska/Canada and the Alpha Ridge), Makarov Basin (between the Alpha and Lomonosov Ridges), Amundsen Basin (between Lomonosov and Gakkel ridges), and Nansen Basin (between the Gakkel Ridge and the continental shelf that includes the Franz Josef Land). In large parts of the Arctic Ocean, the top layer (about ) is of lower salinity and lower temperature than the rest. It remains relatively stable, because the salinity effect on density is bigger than the temperature effect.
Nansen Ski Jump 2011, a historical marker was placed to commemorate this ski jump. Over time the ski jump evolved into a state of disrepair. In 2015, brush clearing work was started as Phase 1 torward a goal of restoring the site so visitors can view it as it once was. In 2016 and 2017, repairs to the ski jump's decking were made by Knollstone Contracting of Bow, New Hampshire, in preparation for a celebratory jump by Olympian Sarah Hendrickson, which occurred early in the morning of March 4, 2017. Nansen Ski Jump Nansen Ski Jump, also known as The Big Nansen and