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CH3041
GLOBAL OCEAN
CIRCULATION
• Dense, cold water
sinks at the poles & the ocean is
mixed to 1 km. The bottom water is
displaced and
moves up.
displaced and
moves up.
• H2O t ocean is
3.8 x 104 years.
3.8 x 104 years.
• To complete
the circulation
from deep-flow
back via the surface takes » 1200 years.
the circulation
from deep-flow
back via the surface takes » 1200 years.
• Distributes
elements around the globe.
North
Atlantic
Antartica
