Just below Greenland is a menacing stretch of water known as the Cold Blob. As the planet heats up, the Cold Blob remains a spooky outlier — positioned right above the area where the Atlantic Ocean’s so-called conveyor belt is supposed to switch back and head south.
The Atlantic Meridional Overturning Current, or AMOC for short, comprises an enormous system of currents that carries water and nutrients across the world and plays a large part in stabilizing the global climate. For years, scientists have warned that the AMOC was slowing down, possibly nearing collapse. The Cold Blob is the most immediately visible proof of its decline, likely a result of Greenland’s melting glaciers, but research on the deep water current’s strength over recent years has varied wildly.
New studies published in Nature Geoscience last week and in Nature earlier this year offer some slightly encouraging news. AMOC’s decline could be “much more of a slow, gradual change, rather than an immediate change,” said David Bonan, a postdoctoral fellow at the University of Washington ... Read more
