• The Atlantic Meridional Overturning Circulation (AMOC) is a large system of ocean currents that carry warm water from the tropics northwards into the North Atlantic.

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• It aids in distributing heat and energy around the earth, as the warm water it carries releases heat into the atmosphere, and in absorbing and storing atmospheric carbon.
• The AMOC is a large system of ocean currents, like a conveyor belt, driven by differences in temperature and salt content – the water’s density.
• As warm water flows northwards it cools and some evaporation occurs, which increases the amount of salt
• Low temperature and a high salt content make the water denser, and this dense water sinks deep into the ocean.
• The cold, dense water slowly spreads southwards, several kilometres below the surface.
• Eventually, it gets pulled back to the surface and warms in a process called “upwelling” and the circulation is complete.