From the CNN article I linked above-

"Höfn sits in the shadow of Iceland’s largest ice cap, Vatnajökull. For centuries, the mighty weight of Vatnajökull has compressed the ground underneath it. But global warming is causing these ice caps and glaciers to melt rapidly, now faster than at any point in the last 200 years. As they disappear, the ground is literally rising."

Global warming is the aspect of climate change that is melting the ice up there.