Which current is driven by powerful westerly winds north of Antarctica and is the largest of all ocean currents, continuing eastward indefinitely?

Which current is driven by powerful westerly winds north of Antarctica and is the largest of all ocean currents, continuing eastward indefinitely?

• A. Gulf Stream
• B. West Wind Drift (Antarctic Circumpolar Current)
• C. Kuroshio Current
• D. Equatorial Current

Answer: (B)

A current that encircles Antarctica is driven by the strong westerly winds in the Southern Ocean, creating a continuous belt of water that flows eastward around the globe. Because there are no land barriers to break it, this current can circulate indefinitely and move a huge volume of water, making it the largest ocean current by transport. This Antarctic Circumpolar Current, also known as the West Wind Drift, links the Pacific, Atlantic, and Indian Oceans and helps isolate Antarctic waters from warmer subtropical waters. In contrast, the Gulf Stream is a northern-hemisphere boundary current along the U.S. East Coast, the Kuroshio is a western boundary current in the North Pacific, and the Equatorial Current runs near the equator and is driven by trade winds, not a circumpolar flow.

A current that encircles Antarctica is driven by the strong westerly winds in the Southern Ocean, creating a continuous belt of water that flows eastward around the globe. Because there are no land barriers to break it, this current can circulate indefinitely and move a huge volume of water, making it the largest ocean current by transport. This Antarctic Circumpolar Current, also known as the West Wind Drift, links the Pacific, Atlantic, and Indian Oceans and helps isolate Antarctic waters from warmer subtropical waters. In contrast, the Gulf Stream is a northern-hemisphere boundary current along the U.S. East Coast, the Kuroshio is a western boundary current in the North Pacific, and the Equatorial Current runs near the equator and is driven by trade winds, not a circumpolar flow.