claim: “Ice-free means the central basin of the Arctic will be ice-free
evidence: 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 ).