Bouvet Island island was claimed for the British Crown by George Norris, who named it Liverpool Island. He also reported Thompson Island as nearby, although this was later shown to be a phantom island. The first "Norvegia" expedition landed on the island in 1927 and claimed it for Norway. At this time the island was named "Bouvet Island", or "Bouvetøya" in Norwegian. After a dispute with the United Kingdom, it was declared a Norwegian dependency in 1930. It became a nature reserve in 1971. The island was discovered on 1 January 1739 by Jean-Baptiste Charles Bouvet de Lozier, commander of the French
Bouvet Island pack ice. The Bouvet Triple Junction is located west of Bouvet Island. It is a triple junction between the South American Plate, the African Plate and the Antarctic Plate, and of the Mid-Atlantic Ridge, the Southwest Indian Ridge and the American–Antarctic Ridge. The island is located south of the Antarctic Convergence, giving it a marine Antarctic climate dominated by heavy clouds and fog. It experiences a mean temperature of , with January average of and September average of . The monthly high mean temperatures fluctuate little through the year. The peak temperature of was recorded in March 1980, caused by