>Achim Steiner, executive director of the United Nations Environment Program, said today that the world’s glaciers are melting “at an alarming rate”, based on data collected by the World Glacier Monitoring Service in Zurich.
Juliette Jowit from the Observer writes:
Glaciers act like gigantic water towers: snow falls on the top in wet seasons, where it freezes and compacts over years, while melting water at the bottom is released gradually, keeping rivers flowing even in the hottest weather. ‘Glaciers are like a bank,’ says Professor Wilfried Haeberli, director of the World Glacier Monitoring Service. ‘You have income – mainly snow – and you have expenditure – mainly melting: the difference between snowfall and melting is the yearly balance.’
Since at least 1980 the service has kept a constant record of this net gain or loss in mass balance of 30 ‘reference’ glaciers in nine mountain ranges around the world. It has also used travellers’ diaries, photographs, and the clues left on landscapes scarred by the moving mass of ice and debris to map historic growth and the gradual decline of glaciers since the mid-19th century.
From 1850 to 1970, the team estimates net losses averaged about 30cm a year; between 1970 to 2000 they rose to 60-90cm a year; and since 2000 the average has been more than one metre a year. Last year the total net loss was the biggest ever, 1.3m, and only one glacier became larger. Worldwide, the vast majority of the planet’s 160,000 glaciers are receding, ‘at least’ as much as this, says Haeberli, probably more – a claim supported by evidence from around the world.
In North America, Dr Bruce Molina of the US Geological Survey says that in Alaska ’99-plus per cent of glaciers are retreating or stagnating’.
In the European Alps, a report last year by UNEP said glaciers declined, from a peak in the 1850s, by 35 per cent by 1970 and by 50 per cent by 2000, and lost 5-10 per cent in the mega-hot year of 2003 alone.
UNEP has also reported declines in the last 50-150 years of 1.3 per cent in the Arctic islands to 50 per cent in the North Caucasus in Russia, 25-50 per cent in central Asia, a 2km retreat of the massive Gangotri glacier which feeds the Ganges, 49 to 61 per cent in New Zealand, and 80 per cent in the high mountains of southern Africa. There is also ‘considerable’ shrinking of medium and small glaciers in central Chile and Argentina accompanied by ‘drastic retreat’ of glaciers in Patagonia to the south.
Steiner also mentioned that the Climate Conference to be held in 2009 in Copenhagen “will provide the true litmus test of governments’ commitment to reducing greenhouse gas emissions, the carbon pollution from fossil fuels damaging Earth’s climate system.
Otherwise, and like the glaciers, our room for manoeuvre and the opportunity to act may simply melt away.”
>the day I trust anything the U.N. says aboyt the “THEORY” of global warming will be a cold day in hell. all the supposed data on global warming is conjecture, theory, and guesses. if its global warming than why did we have the coldest winter since 2001? sounds like were going backwards. I hope the U.N. still doesn’t rely on the old discredited hockey stick graph. The simple truth is global warming is only a theory, a bad one at that, not backed up by sound science. Since when is a theory considered fact just because a lot of people think it is so. Science consists of cold hard facts, pro or con to the theory, not just those facts that support your case. the whole global warming theory is built on CO2 forcing, which is unproven. Don’t fall for the fear and hype, weren’t these the same people who were convinced in the 70’s we were heading for global cooling? Lastly, i find it hard to beleive that the same people who have trouble figuring out the weather 7 days in advance can tell me the weather 50 years in the future.Steve
>Steve, the talents of your local meteorologist have nothing to do with the fact that the glaciers are indeed shrinking.
>Damn you, Moe!By the way, “weather” and “climate” are not synonyms.
>The oil companies that pay for anti-global warming research would be proud of you stege. where’s mer?