The same storms also continued past Cape Farewell at Greenland's southern tip, creating a phenomenon called Greenland tip jets
: High winds from the west deflect around Greenland's glacial slopes, accelerating and drawing cold, ocean-chilling air into a relatively small area over the southern Irminger Sea.
At the heart of GFDex are wind patterns known as "tip jets." Greenland, an icy obstacle more than three times the size of Texas, forces air to go around its bulk and creates regions of high windspeeds.
Now known as reverse tip jets, these also force circulation of water over the Labrador Sea to the west of Greenland.