In a world which has notably warmed by about 1 °C over the last 100 years, the “cold blob” represents a unique ocean surface region in the central North Atlantic which paradoxically has cooled by almost 1 °C over the same period. We show here that the intensity and coherence of the cold blob is greatest in winter, but its development appears to be connected with a surface cooling of water near the SE coast of Greenland in late autumn. This pool of cold water is likely to have its origin in summer meltwater from the Greenland ice sheet and sea?ice and we suggest ways in which it could reach and sustain the cold blob. In summer the cold blob disappears because it is overwhelmed by warming influences associated with past and current reductions in sea ice cover in the coastal sub?Arctic regions of the NW Atlantic. These warming influences associated with reductions in sea ice are part of the reason why Arctic temperatures have recently risen faster than anywhere else.
Ik vermoed dat e.e.a. wel duidelijk is.
http://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JC015379