Scientists monitoring the Atlantic Cold Blob in the North Atlantic Ocean reported in March 2026 that unusual cooling south of Greenland may signal further weakening of a critical ocean circulation system.
The report arrives as global ocean temperatures remain near record highs, increasing scrutiny of climate linked shifts in major marine systems.
Researchers have tracked the Atlantic Cold Blob for decades. Since 1900, waters south of Greenland have cooled while surrounding oceans warmed.
Scientists increasingly connect this anomaly to the Atlantic Meridional Overturning Circulation (AMOC).
Stefan Rahmstorf of the Potsdam Institute for Climate Impact Research said multiple datasets indicate a long term AMOC slowdown.
Niklas Boers of the Technical University of Munich has warned that reduced circulation stability warrants continued monitoring.
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