Read the damned article, Frank! What they are talking about is the rapid melting of the Greenland Ice Cap, and the significant slowing or even stopping of the Thermohaline circulation. This, as a result of global warming.
BBC - Science & Nature - Horizon - Big Chill
BOB THOMAS (NASA, Wallops Island): It comprises enough water to raise sea level by about six or seven metres if it all were to melt.
NARRATOR: They mapped the ice with a combination of global positioning satellites and lasers. The satellite measures the height of the plane and the laser measures the distance from the plane to the ice.
BILL KRABILL: There are five thousand individual beams per second that are being projected in to that scan there and then down in a pattern on the surface, measures the surface at ten centimetre accuracy.
NARRATOR: At five year intervals they have flown the same route across the island, each time they have measured the height of the ice. By comparing the two measurements they can see if the ice is growing or shrinking.
BILL KRABILL : Theres definitely changes taking place here, all over the margin of the Greenland ice sheet it is thinning. Its equivalent to fifty cubic kilometres of ice and snow that are disappearing off the Greenland ice sheet each year.
NARRATOR: This fifty gigotonnes of water melting from Greenland was the first evidence that global warming might be effecting the ice sheet here. But one change really shocked them. They started to measure one of the islands biggest glaciers.
BOB THOMAS: Less than ten years ago, five years ago, it was moving at about six, seven kilometres per year. And that was more or less in balance with the snowfall. Now in the five years since then the speed is almost doubled.
NARRATOR: Its now advancing at twelve kilometres a year. The increase seems to be linked to global warming. Its the fastest moving glacier on the planet. It dumps enough fresh water in to the sea each day to supply London for several months. Global warming seems to be reshaping the whole landscape of one of the biggest ice sheets on earth.
BOB THOMAS: Well I myself am convinced that global warming has affected the dynamics of the Greenland ice sheet and um that is possibly because increased melt water is creeping to the bed through crevasses and boullans and lubricating the bed and making it far more easy for the er, for the ice to flow.