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.
Fridtjof Nansen was signed on 2 November 1907, and Nansen considered his task complete. Resisting the pleas of, among others, King Edward that he should remain in London, on 15 November Nansen resigned his post. A few weeks later, still in England as the king's guest at Sandringham, Nansen received word that Eva was seriously ill with pneumonia. On 8 December he set out for home, but before he reached Polhøgda he learned, from a telegram, that Eva had died. After a period of mourning, Nansen returned to London. He had been persuaded by his government to rescind his resignation until after