A vast patch of unusually cold water in the North Atlantic Ocean is drawing increasing concern from climate scientists, as new research suggests it could signal the weakening of one of Earth’s most important ocean circulation systems. Located south of Greenland and Iceland, the so-called “cold blob” has puzzled researchers for decades. While global ocean temperatures … [Read more...] about A mysterious ‘cold blob’ in the ocean has puzzled scientists. A new study says it’s an ominous sign