Which explorer spent five winter months alone in an Antarctic base in 1934?

Rear Admiral Richard Evelyn Byrd Jr. (October 25, 1888 – March 11, 1957) was a pioneering American aviator, polar explorer, and organizer of polar logistics. He undertook five expeditions to Antarctica and made the first-ever flight over the South Pole on November 28, 1929. Byrd was a recipient of the Medal of Honor, the highest honor for heroism given by the United States.

His first Antarctic expedition (1928–30), the largest and best-equipped that had ever set out for that continent, sailed south in October 1928. A substantial and well-supplied base, called "Little America", was built on the face of the Ross Ice Shelf, a wide plain of shelf ice fronting the Ross Sea near an indentation in the ice cliff named the Bay of Whales. Flights were made from this base over the Antarctic continent.

He launched a second expedition in 1933-1935, with the aim of mapping and reclaiming land around the Pole; he expanded the exploration of Marie Byrd Land and continued scientific observations of it. During the winter of 1934 (from March to August) he spent five months alone in a hut at a weather station named "Advance Base", buried beneath the ice shelf face 123 miles (196 km) south of "Little America", enduring temperatures between −58° and −76° F (−50° and −60° C) and sometimes much lower. He was finally rescued in a desperately sick condition, suffering from frostbite and carbon monoxide poisoning.

This expedition is described by him in his autobiography "Alone".