Taxonomy term

antarctic circumpolar current

Seafloor topography drives Earth's great conveyor belt

In the Southern Ocean, the world’s largest current in terms of volume transport — the Antarctic Circumpolar Current (ACC) — encircles Antarctica and connects the Atlantic, Indian and Pacific ocean basins, as it flows from west to east. The ACC influences ocean circulation and global climate, as it rises from the deep to interact with the atmosphere. In a new study, published in the Journal of Geophysical Research: Oceans, researchers have directly measured how seafloor topography affects the current’s structure — something that had only been theorized previously.

20 Dec 2016

Ancient volcanic island arc blocked Antarctic current formation

There has long been a debate in the geological community over what caused the formation of the Antarctic ice sheet during the Eocene-Oligocene period about 30 million years ago. One of the widely accepted hypotheses is that the glaciation was triggered by the commencement of the Antarctic Circumpolar Current (ACC), an ocean current that circles Antarctica insulating the continent from the warm waters to the north, allowing the ice sheet to remain relatively stable.

11 Sep 2013