when did the antarctic ocean become an ocean
Southern Ocean The Southern Ocean, geologically the youngest of the oceans, was formed when Antarctica and South America moved apart, opening the Drake Passage, roughly 30 million years ago. The separation of the continents allowed the formation of the Antarctic Circumpolar Current.
Climate of Antarctica On the coast Antarctic average temperatures are around -10°c (in the warmest parts of Antarctica) and in the elevated inland they average about -55°C in Vostok.[7][8][9]