New study links Atlantic “cold blob” to declining ocean heat transport
The Atlantic “cold blob” — a persistent cooling anomaly in the subpolar North Atlantic south of Greenland and Iceland — is primarily caused by reduced ocean heat transport into the region rather than increased heat loss to the atmosphere, according to a study published in Geophysical Research Letters on May 28, 2026. The findings add to growing evidence of a long-term weakening of the Atlantic Meridional Overturning Circulation (AMOC).

