In potential collapse of a key ocean current, consequences for world and India, Pg15

Key Highlights:

• New research indicates the Atlantic Meridional Overturning Circulation (AMOC) could weaken by up to 59% by 2100.
• A weakened AMOC poses a significant threat to the Indian summer monsoon, impacting agriculture and water supplies for millions.

Detailed Insights:

• The AMOC functions as a global conveyor belt, transporting warm, salty water from the tropics towards Greenland, influencing climate patterns worldwide.
• Climate change is causing Arctic ice to melt, introducing freshwater into the North Atlantic, which hinders the sinking of water and slows down the AMOC.
• A weaker AMOC traps heat in the southern hemisphere, cools the North Pacific, and disrupts the temperature balance that drives El Niño events.
• The weakening AMOC could shift the planet's tropical rain belt south, away from the Indian subcontinent, leading to shorter wet seasons and longer dry spells in India.
• Unpredictable El Niño events, exacerbated by a declining AMOC, would intensify climate risks for Indian farmers, causing extreme droughts and destructive floods.

Key Concepts Involved:

• Atlantic Meridional Overturning Circulation (AMOC): A system of ocean currents that regulates climate across the globe by moving heat.
• Climate Tipping Point: A threshold beyond which a change to a component of the climate system becomes self-perpetuating.
• El Niño: A periodic warming of the Pacific Ocean that disrupts global weather patterns.

AMOC