Topic: Currents and Ocean Circulation
Theme: Change

Key Concepts:

Currents and Climate

  • The North Atlantic Deep-Water conveyor belt has switched off and on in the past. Periods when it has not operated seem to be associated with colder climates, expecially in Europe. The change to a warmer climate takes place abruptly when the conveyor is switched on.

  • A change in climate induced by global warming leads to increased melting of the Greenland ice sheet, which scientists theorize could lead to a large influx of fresh water that: