Arctic

Johansen joined Nansen's polar expedition with Fram in 1893; he had to take the position of stoker, as the others were filled. After Fram froze fast, he became an assistant to Sigurd Scott-Hansen (1868–1937) with his meteorologic studies. Johansen was an expert dog driver. Using skis and sled dogs, Johansen accompanied Nansen on their joint closest approach to the North Pole, 86 degrees 14 minutes north, in 1895. On their way home, Johansen and Nansen were forced to spend the winter on Franz Josef Land because of severe damage to their kayaks when crossing open channels in the ice. During the expedition, Johansen once fell through the ice and was barely saved by Nansen, and also received a blow on his head from a polar bear.^{[3] [4]}

On the return of the Nansen parties to Norway, Johansen and other members of the crew of the Fram were celebrated as heroes. Johansen was promoted to captain in the Norwegian infantry at the garrison in Tromsø. However he drank heavily and in 1907 he was asked to resign his position in the army. Between the years 1907 to 1909, Johansen participated in four expeditions to Svalbard.^[5]

Antarctica

In 1910 he was one of Amundsen's men on the Fram and in Antarctica. Amundsen and his men, racing for the South Pole with Robert Falcon Scott, started out for the South Pole too early in the season and had to return to base camp at the Bay of Whales.^[6]

Johansen had disagreed with the early start and had to rescue a less experienced member of the party, Kristian Prestrud, from freezing to death on the return journey. Amundsen had taken the best dogsled and sped off towards the camp without regard for his men as a storm approached. As a result, Prestrud and Johansen had no tent or cooking equipment to melt snow and had no choice but to press on for the camp in a blizzard with extreme windchill (−50 °C) and a dangerous descent towards the base camp.

Johansen had saved Prestrud from death and carried him to the base camp. However, the mishap enraged Amundsen. Upon their return to the Bay of Whales, Johansen quarrelled with Amundsen in front of the other men; Amundsen reacted to the argument by dismissing Johansen from the party heading for the South Pole. He further disciplined Johansen by ordering him to subordinate himself to Prestrud, and ordering the two men to embark on a minor expedition towards King Edward VII Land while the other members of the main expedition resumed their trek towards the Pole.

The Amundsen party successfully reached the South Pole and reunited with the subsidiary party. On the expedition's landfall in Tasmania Amundsen dismissed Johansen from the Fram, paid him off, and ordered him to return separately to Norway. Once Johansen had left Amundsen's party, the triumphant leader made the entire remaining crew sign a paper that stated that they were to keep quiet about the whole expedition. Amundsen was to have the sole right of writing about it in his soon-to-be-published book. After returning separately to Norway, Johansen found that he was never to be credited by Amundsen for any contribution to the expedition, including his heroic rescue of Prestrud.^[7]

Johansen was awarded the South Pole Medal (Sydpolsmedaljen), the Royal Norwegian award instituted by King Haakon VII in 1912 to reward participants in Roald Amundsen's South Pole expedition. However, Johansen had resumed drinking alcohol, became clinically depressed and in 1913 committed suicide. His wife Hilda Øvrum (1868–1956) and their four children survived him.^[8]