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The Walker circulation is

  • A.the circulation of the deep ocean below
  • B.a purely oceanic current system
  • C.an east to west overturning cell
  • D.a north to south cell between equator and pole

Answer: C

Air rises over the warm western Pacific, flows east aloft, sinks over the cold eastern Pacific and returns as the trades. It is a zonal cell rather than a meridional one like the Hadley. Warm water anchors the ascending branch.

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