Antarctic Circumpolar Current
The largest and most important ocean current in the southern hemisphere. It flows in an eastward direction around Antarctica, and occupies a wide tract of water in the South Pacific, South Atlantic, and Indian Oceans. There is very little separation between surface-and bottom-water circulation within this area. The current is remarkably constant and is characterized by low salinity (less than 34.7 parts per thousand), and cold waters (−1 to 5°C). It is the only current which flows right around the world.