EDIT
For more than 20 years, Pedro Skvarca has studied the Devil's Bay glacier on Vega Island off the Antarctic Peninsula, a part of Antarctica that is warming five times faster than the average in the rest of the world. The whole of Antarctica holds enough ice and snow to raise world sea levels by 187 feet if it all melted over thousands of years, according to U.N. data.
Skvarca said the Devil's Bay glacier has thinned by 3.3 feet (1 meter) per year on average since his research began. But its deterioration has been unusually marked in the past year. "We've observed a tremendous ablation (during the past year), which is really unusual," Skvarca, head of the Argentine Antarctic Institute's Glaciology Division, told Reuters in an interview at Argentina's main center for studying Antarctica, the Marambio base.
Ablation is the melting and falling away of ice in the zone at the foot of a glacier. "(Last year) I put a box with a thermometer in it next to a marker that was level with the top of the ice. I found it half a meter in the air hanging from a wire," he said last week.
EDIT
Skvarca said the glacier at Devil's Bay was the only Antarctic glacier to have its mass balance tracked consistently in recent years. Mass balance is the difference between what is added to a glacier from snow or ice accumulation in the winter and what is melted or falls away in the summer. "This is important because if you add up the mass balance of all the world's glaciers, we have very clear indications that we're in a period of atmospheric warming and receding glaciers," he said as he prepared to take a military flight home at the end of his annual studies during the Southern Hemisphere's summer.
EDIT
http://www.reuters.com/article/reutersEdge/idUSN1462532420080314