Then, the article quote two people who guess or assume, without saying why, that this cooling is surely temporary and warming will be worse when it comes back.

The problem is conservation of energy. The enhanced greenhouse effect means the earth is radiating less energy into space that it is absorbing from the sun.

And so the accelerating ice sheet mass loss that is affecting the rest of the world, and the rest of Greenland, must, at some point, distribute back to this glacier.