South Atlantic Gyre

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The South Atlantic Gyre (1943) South Atlantic Gyre.png
The South Atlantic Gyre (1943)
The ocean currents and gyres of Earth, based on a "dolphins perspective" with flow direction (warm in red, cold in blue) Currents.svg
The ocean currents and gyres of Earth, based on a "dolphins perspective" with flow direction
(warm in red, cold in blue)

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]

Contents

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

A tristan thrush on Inaccessible Island, strewn with oceanic trash. Nesocichla eremita -Inaccessible Island, British overseas territory-8 (3).jpg
A tristan thrush on Inaccessible Island, strewn with oceanic trash.

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]

See also

References

  1. ↑ Guhin, S.; Ray, P.; Mariano, A. J.; Ryan, E. H. (2003). "The South Atlantic Current". Ocean Surface Currents. Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami. Archived from the original on 23 April 2023. Retrieved 21 October 2009.
  2. ↑ "National Geographic Endeavour: At Sea, South Atlantic Gyre". Daily Expedition Report. Lindblad Expeditions, National Geographic Society. 18 March 2004. Retrieved 5 April 2014.
  3. ↑ 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.
  4. ↑ 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.
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