Voyage to the Bottom of the Sea named for the radio message he sent to the Chief of Naval Operations to announce that "Nautilus" had reached the pole. His second book about these missions, "The Ice Diaries: The Untold Story of the Cold War's Most Daring Mission" (with Don Keith), was completed shortly before Anderson's death. This second book includes many previously classified details. On March 17, 1959, the nuclear submarine , under the command of Commander (later Vice Admiral) James F. Calvert, became the first submarine to surface at the North Pole. While at the Pole, her crew scattered the ashes of Arctic explorer Sir Hubert
North Pole heat), rather than at altitude on a continental land mass. Despite being an ice cap, it shares some characteristics with a tundra climate ("ETf") due to the July and August temperatures peaking just above freezing. Winter temperatures at the northernmost weather station in Greenland can range from about , averaging around , with the North Pole being slightly colder. However, a freak storm caused the temperature to reach for a time at a World Meteorological Organization buoy, located at 87.45°N, on December 30, 2015. It was estimated that the temperature at the North Pole was between during the storm. Summer