Enlarge / The blue "warming hole" in the North Atlantic seems to be related to changes in Atlantic Ocean circulation. (credit: NOAA) Last week, Nature published a climate science study that reached a very surprising conclusion—one that other climate scientists are taking issue with. Two other scientists penned a critical response and posted it at Real Climate the same day, outlining their issues with the study's findings. This kind of argument could be left to play out among scientists, but the BBC News covered the study without skeptical counterweight, so we thought it would be worth explaining what the arguments are about. AMOC run amok The study by Xianyao Chen of the Ocean University of China and Ka-Kit Tung at the University of Washington focused on the large-scale movement of water in the Atlantic Ocean.