Mountain glaciers are shrinking three times faster than they were in the 1980s, scientists have announced.

Of all the various features that make up the surface of the Earth, glaciers are perhaps showing the starkest signs of rising temperatures.

The World Glacier Monitoring Service (WGMS), based in Switzerland, continuously studies a set of 30 mountain glaciers in different parts of the world. It is not quite a representative sample of all mountain glaciers, but does give a reliable indication of global trends.

The latest survey, just released, shows accelerating decline. During 2005, this sample of 30 glaciers became, on average, 60-70cm thinner.

This figure is 1.6 times more than the average annual loss during the 1990s, and three times faster than in the 1980s.

With mountain glaciers typically only tens of metres thick, this meant, said WGMS director Wilfried Haeberli, that many would disappear on a timescale of decades if the trend continued.

"We can say there were times during the warmer periods of the last 10,000 years when glaciers have been comparable to what they are now," he told the BBC News website.

"But it is not the past that worries us, it is the future. With the scenarios predicted, we will enter conditions which we have not seen in the past 10,000 years, and perhaps conditions which mankind has never experienced."

The WGMS is closely allied to the United Nations Environment Programme, whose executive director Achim Steiner commented: "Glaciers are important sources of water for many important rivers upon which people depend for drinking water, agriculture and industrial purposes.

"The findings... should strengthen the resolve of governments to act now to reduce greenhouse gas emissions."

http://news.bbc.co.uk/2/hi/science/nature/6310869.stm

[No problem. We will just use a million tons of fossil fuels and import new ice from the Antarctis region.]