South Atlantic Gyre

Subtropical gyre in the south Atlantic Ocean

The worlds oceans currents and gyres based on a "dolphins perspective" with flowing direction
red = warm, blue = cold

The South Atlantic Gyre is the subtropical gyre in the south Atlantic Ocean. In the southern portion of the gyre, northwesterly (or southeastward-flowing) winds drive eastward-flowing currents that are difficult to distinguish from the northern boundary of the Antarctic Circumpolar Current.^[1] Like other oceanic gyres, it collects vast amounts of floating debris as a garbage patch.^[2]

Southern boundary

South of this gyre is the Antarctic Circumpolar Current. This current flows from West to East around Antarctica. Another name for this current is the West Wind Drift. This current allows Antarctica to maintain its huge ice sheet by keeping warm ocean waters away. At approximately 125 Sv, this current is the largest ocean current.^[3]

Western boundary

The Brazil Current is the western boundary current of the gyre. It flows south along the Brazilian coast to the Rio de la Plata. The current is considerably weaker than its North Atlantic counterpart, the Gulf Stream.^[4]

References

^ Guhin, S.; Ray, P.; Mariano, A. J.; Ryan, E. H. (2003). "The South Atlantic Current". Ocean Surface Currents. Archived from the original on 23 April 2023. Retrieved 21 October 2009.
^ "National Geographic Endeavour: At Sea, South Atlantic Gyre (March 18, 2004)". Daily Expedition Report. Lindblad Expeditions - National Geographic. Retrieved 5 April 2014.
^ Smith, R.; Desflots, M.; White, S.; Mariano, A. J.; Ryan, E. H. (2013). "The Antarctic Circumpolar Current". Ocean Surface Currents. Archived from the original on 14 June 2010. Retrieved 21 October 2009.
^ Bischof, B.; Rowe, E.; Mariano, A. J.; Ryan, E. H. (2004). "The Brazil Current". Ocean Surface Currents. Archived from the original on 11 November 2020. Retrieved 21 October 2009.

External links

Ocean currents (rsmas.miami.edu) Archived 2022-01-20 at the Wayback Machine
Ocean currents (nasa.gov)

Ocean currents and gyres

Currents

Arctic Ocean	East Greenland North Icelandic Norwegian Transpolar Drift Stream
Atlantic Ocean	Angola Antilles Azores Baffin Island Benguela Brazil Canary Cape Horn Caribbean East Greenland East Iceland Falkland Florida Guinea Gulf Stream Irminger Labrador Lomonosov Loop North Atlantic North Brazil North Equatorial Norwegian Portugal South Atlantic South Equatorial West Greenland West Spitsbergen
Indian Ocean	Agulhas Agulhas Return East Madagascar Equatorial Counter Indian Monsoon Indonesian Throughflow Leeuwin Madagascar Mozambique North Madagascar Somali South Equatorial West Australian
Pacific Ocean	Alaska Aleutian California Cromwell Davidson East Australian East Korea Warm Equatorial Counter Humboldt Indonesian Throughflow Kamchatka Kuroshio Mindanao North Equatorial North Korea Cold North Pacific Oyashio South Equatorial Tasman Front
Southern Ocean	Antarctic Circumpolar Tasman Outflow

Gyres

Major gyres	Indian Ocean Gyre North Atlantic Gyre South Atlantic Gyre North Pacific Gyre South Pacific Gyre
Other gyres	Beaufort Gyre Ross Gyre Weddell Gyre