Nils Otto Gustaf Nordenskjöld (6 December 1869 – 2 June 1928) was a Swedish geologist, geographer, and polar explorer.

The following spring, early in November 1902, Larsen sailed south to retrieve the party, but the Antarctic became trapped in ice and so damaged it eventually sank on 12 February 1903, forcing the crew to winter in a hastily constructed shelter on Paulet Island.

Larsen and Nordenskjöld finally rendezvoused at their fall-back rescue hut at Hope Bay in November 1903 and were soon picked up by the corvette ARA Uruguay (commanded by Julián Irízar), dispatched after Antarctic had failed to make its appointed return to Argentina.

Despite its end and the great hardships endured, the expedition was considered a scientific success, having explored much of the eastern coast of Graham Land, including Cape Longing, James Ross Island, the Joinville Island group, and the Palmer Archipelago, recovering also valuable geological samples and samples of marine animals.

He also studied the effects of winter on alpine climate, and developed a formula for identifying the boundaries of the Arctic region based on the temperatures in the warmest and coldest months of the year.