North Pole Since 2002, the Russians have also annually established a base, Barneo, close to the Pole. This operates for a few weeks during early spring. Studies in the 2000s predicted that the North Pole may become seasonally ice-free because of Arctic ice shrinkage, with timescales varying from 2016 to the late 21st century or later. The sea depth at the North Pole has been measured at by the Russian Mir submersible in 2007 and at 4,087 m (13,410 ft) by USS "Nautilus" in 1958. The nearest land is usually said to be Kaffeklubben Island, off the northern coast of Greenland about
Old Pulteney Row To The Pole position on 25 August. It was the first time any surface vessel under human power had been to any pole position. The expedition was the first attempt at such a voyage and was made possible by the open water in the Arctic region in summer. According to the National Snow and Ice Data Center, part of the University of Colorado, the Arctic sea ice melted to its third smallest extent (since 1979, when satellite measurements began) in September 2010. Prior to 1979 ice extents are unreliable. The adventure was conceived by Scots adventurer Jock Wishart in 2007 when Wishart was