Outrage + Optimism: The Climate Podcast “This is civilisation changing stuff”: Is AMOC the hardest climate story to tell?
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Apr 30, 2026 Dr Willem Huiskamp, oceanographer at the Potsdam Institute, explains the Atlantic Meridional Overturning Circulation and why its weakening matters. He outlines how AMOC shapes Europe’s climate, what a major slowdown could mean for cold extremes, drought and food systems. They also discuss why this counterintuitive story is so hard to communicate and how language and practical resilience shape public response.
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How The AMOC Engine Actually Works
- AMOC is a north–south ocean conveyor with warm salty surface water flowing north, cooling, sinking, and returning south as deep water.
- Willem Huiskamp explains the sink in the subpolar North Atlantic near Greenland produces North Atlantic Deep Water that powers heat transport to Europe.
Weaker AMOC Means Colder Winters And Drier Summers
- A substantially weakened AMOC would cold-shift the subpolar North Atlantic and alter rainfall patterns, making northwest Europe colder in winter and drier in summer.
- Willem warns of extreme winter lows (e.g., −50°C in Oslo, −20°C in London) and reduced arable farming in the UK under strong slowdown scenarios.
Better Performing Models Show Larger AMOC Decline
- New model-analysis finds models that best match observations project a larger AMOC slowdown by 2100, around ~50% instead of ~30–37% under moderate warming.
- Willem describes the study filtering for low-bias models which produced the higher decline projections.
