Atlantic Meridional Overturning Circulation

SEO Title: Atlantic Meridional Overturning Circulation (AMOC): Ocean Currents, Climate and Global Impact

Category: Environment & Ecology | Climate Change | Oceanography

UPSC Notes

The Atlantic Meridional Overturning Circulation (AMOC) is a large-scale system of ocean circulation in the Atlantic Ocean that transports heat northward and cold, dense water southward.

Key Pointers

  • Major component of the global ocean circulation system.

  • Moves warm surface waters northward.

  • Cold, dense waters sink at high latitudes and return southward at depth.

  • Closely linked with the Atlantic Ocean's climate system.

  • Influences:

    • European climate

    • Tropical rainfall

    • Sea level patterns

    • Marine ecosystems

  • Climate change can affect ocean temperature, salinity and freshwater input, potentially influencing AMOC strength.

  • AMOC is different from a single surface current; it is a large-scale overturning circulation.

Prelims Focus: AMOC → Atlantic Ocean → heat transport → sinking cold water → climate regulation.