Ocean thermohaline circulation,  system  of various ocean currents and transporters of water mass, is critical to the distribution of heat, salinity, minerals, dissolved gases and nutrients across the globe, thus maintaining a habitable planet. In the Atlantic, this circulation, a continuous conveyor belt of interconnected currents, is known as the Atlantic Meridional Overturning Circulation (AMOC). The AMOC is an important part of Earth's global ocean circulation and includes a network of surface and deep currents in the Atlantic Ocean. It characterizes  the northward movement of warm, salty surface waters and the southward flow of cooler, deep waters. These two distinct parts of the circulation are linked by overturning processes that occur in the North and Labrador Seas as well as in the Southern Ocean. The warm, salty, dense water heading north from the tropics cools as it slowly loses heat to the atmosphere and gradually descends as it nears the northern end of the Atlantic, returning south across the equator to the southern hot zone where it begins to warm. up again, completing the cycle. (Pitamber Kaushik)