
Jonassen Island
(Trinity Peninsula)
British Antarctic Territory
Location: 63° 32' 33" S 56° W
separated from Tabarin Peninsula, Trinity Peninsula, by Fridtjof Sound and from Andersson Island by Yalour Sound. The island was roughly charted by the French Antarctic Expedition, 1837-40, on 27 February 1838, when the name IÎle Rosamel (Rosamel Island, q.v.) was applied collectively to this island and Andersson Island (d'Urville, 1842, end map); further charted as a separate island by the Swedish Antarctic Expedition, 15 January 1902, and named IÎle Irizar after Capt. (F) J. Irízar (Irizar Island, q.v.). The island was surveyed by the Falkland Islands Dependencies Survey from 'Hope Bay', 1945-47. Jonassen Island, renamed after Ole Jonassen of the Swedish Antarctic Expedition, who accompanied O. Nordenskjöld on his two principal sledge journeys, 1902-03.