世界地图新增第五大洋

For the first time in over a century, there's a new ocean on the map. National Geographic announced Tuesday that it is officially recognizing the body of water surrounding the Antarctic as the Southern Ocean, making it the fifth ocean alongside the Arctic, Atlantic, Indian, and Pacific. The new ocean extends in a ring from Antarctica's coastline to 60 degrees south latitude, and differentiates from other oceans in its designation by current, not by continent.

一个多世纪以来，地图上第一次多出一个新的海洋。国家地理周二宣布，它正式承认围绕南极的水体为南大洋，使其成为与北冰洋、大西洋、印度洋和太平洋并列的第五大洋。这个新的大洋从南极洲的海岸线环形延伸到南纬60度，与其他大洋不同的是，它是按洋流而不是按大陆来指定的。