Scientists warn of accelerating AMOC collapse and propose a 100‑km Bering Strait barrier

A new study in Science Advances predicts the Atlantic Meridional Overturning Circulation (AMOC) could lose 42‑58 % of its strength by the end of the century, far faster than previously thought. Researchers say the weakening could trigger irreversible climate shifts for Europe, including harsher winters and sea‑level rise.

French scientists have urged Spain to begin preparing for these impacts, while Iceland has declared a national emergency over the risk. The Netherlands is planning a 100‑km sea dike to protect its coast from related sea‑level changes.

In response to the looming threat, some scientists have floated a “mega‑wall” across the Bering Strait, linking Alaska and Russia, to alter oceanic flows and mitigate the AMOC’s decline. The proposal envisions a massive barrier of up to 100 km in length.

The combined warnings highlight growing concern across Europe and the North Atlantic about the potential climate consequences of an AMOC collapse.