Atlantic Meridional Overturning Circulation

Published on 02 Feb 2025

The Atlantic Meridional Overturning Circulation (AMOC) is a key component of global ocean currents, transporting warm surface water northward and cold, deep water southward that are part of the thermohaline circulation.

Significance of AMOC

• Heat Budget:  Facilitates the distribution of heat and energy across the Earth's surface thus maintaining heat budget. 

• Example: Japanese trench, Mariana trench.

• Regulation of temperature: Maintaining moderate temperatures 

• Example: Because of AMOC, the climate in Western Europe is less severe even during the winter (Gulf Stream, North Atlantic Drift).

• Carbon sequestration: AMOC influences ocean processes aiding carbon sequestration.

• Example: IPCC Report suggests climate change weakens the AMOC, it may hinder the ocean's ability to sequester carbon, potentially accelerating global warming.

• Sea level rise: A weakened AMOC may lead to higher sea levels along certain coastlines.

Example: Weakening AMOC causing higher sea levels along the eastern coast of North America, affecting cities like New York and Miami.

Tags:
Geography

Keywords:
Atlantic Meridional Overturning Circulation oceanography Significance of AMOC AMOC ocean current

Syllabus:
General Studies Paper 1

Topics:
Physical Geography