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Science/Tech
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Title: Melting ice cap triggering earthquakes
Source: The Guardian UK
URL Source: http://www.guardian.co.uk/environme ... 007/sep/08/climatechange/print
Published: Sep 9, 2007
Author: Paul Brown in Ilulissat
Post Date: 2007-09-09 17:15:08 by Zipporah
Keywords: None
Views: 308
Comments: 17

Melting ice cap triggering earthquakes

· Estimates of sea-level rise out of date, say scientists
· Religious leaders pray for planet at Greenland glacier

The Greenland ice cap is melting so quickly that it is triggering earthquakes as pieces of ice several cubic kilometres in size break off.

Scientists monitoring events this summer say the acceleration could be catastrophic in terms of sea-level rise and make predictions this February by the Intergovernmental Panel on Climate Change far too low.

The glacier at Ilulissat, which supposedly spawned the iceberg that sank the Titantic, is now flowing three times faster into the sea than it was 10 years ago.

Robert Corell, chairman of the Arctic Climate Impact Assessment, said in Ilulissat yesterday: "We have seen a massive acceleration of the speed with which these glaciers are moving into the sea. The ice is moving at 2 metres an hour on a front 5km [3 miles] long and 1,500 metres deep. That means that this one glacier puts enough fresh water into the sea in one year to provide drinking water for a city the size of London for a year."

He is visiting Greenland as part of a symposium of religious, scientific, and political leaders to look at the problems of the island, which has an ice cap 3km thick containing enough water to raise worldwide sea levels by seven metres.

Yesterday Christian, Shia, Sunni, Hindu, Shinto, Buddhist and Jewish religious leaders took a boat to the tongue of the glacier for a silent prayer for the planet. They were invited by Bartholomew I, the spiritual leader of 250 million Orthodox Christians worldwide.

Dr Corell, director of the global change programme at the Heinz Centre in Washington, said the estimates of sea level rise in the IPCC report were based on data two years old. The predicted rise this century was 20-60cm (about 8-24ins) , but it would be at the upper end of this range at a minimum, he said, and some believed it could be two metres. This would be catastrophic for European coastlines.

He had flown over the Ilulissat glacier and "seen gigantic holes in it through which swirling masses of melt water were falling. I first looked at this glacier in the 1960s and there were no holes. These so-called moulins, 10 to 15 metres across, have opened up all over the place. There are hundreds of them."

This melt water was pouring through to the bottom of the glacier creating a lake 500 metres deep which was causing the glacier "to float on land. These melt-water rivers are lubricating the glacier, like applying oil to a surface and causing it to slide into the sea. It is causing a massive acceleration which could be catastrophic."

The glacier is now moving at 15km a year into the sea although in surges it moves even faster. He measured one surge at 5km in 90 minutes - an extraordinary event.

Veli Kallio, a Finnish scientist, said the quakes were triggered because ice had broken away after being fused to the rock for hundreds of years. The quakes were not vast - on a magnitude of 1 to 3 - but had never happened before in north-west Greenland and showed potential for the entire ice sheet to collapse.

Dr Corell said: "These earthquakes are not dangerous in themselves but the fact that they are happening shows that events are happening far faster than we ever anticipated."

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Begin Trace Mode for Comment # 4.

#3. To: Zipporah (#0)

Scientists monitoring events this summer say the acceleration could be catastrophic in terms of sea-level rise

This is when I'm glad I'm 600 feet above sea level.

Yesterday Christian, Shia, Sunni, Hindu, Shinto, Buddhist and Jewish religious leaders took a boat to the tongue of the glacier for a silent prayer for the planet.

Like that makes up for centuries of opposing science.

MUDDOG  posted on  2007-09-09   17:39:20 ET  Reply   Untrace   Trace   Private Reply  


#4. To: MUDDOG (#3)

This is when I'm glad I'm 600 feet above sea level.

Yesterday Christian, Shia, Sunni, Hindu, Shinto, Buddhist and Jewish religious leaders took a boat to the tongue of the glacier for a silent prayer for the planet.

Like that makes up for centuries of opposing science.

I saw a documentary re some Pacific island and theyre losing much of their islands due to the encroaching sea.. how this can be ignored is beyond me..

Zipporah  posted on  2007-09-09   17:41:43 ET  Reply   Untrace   Trace   Private Reply  


Replies to Comment # 4.

#5. To: Zipporah (#4)

It's not being ignored. It's being debunked. Whether you or I believe the debunking is irrelevant.

The fact of the matter is that De Facto President Cheney spoke the truth when he said "the American way of life is not negotiable." He also once implied that conservation was unAmerican.

So Americans, in particular, are not EVER going to "negotiate" with Mother Nature or whatever. To do so would require taking actions that remind people of communism.

If all this fearmongering is for real, there will simply be a massive dieoff of the species down to a more sustainable level.

Sam Houston  posted on  2007-09-09 17:48:18 ET  Reply   Untrace   Trace   Private Reply  


#8. To: Zipporah (#4)

theyre losing much of their islands due to the encroaching sea.. how this can be ignored is beyond me..

See levels rise 2-6 mm per year. 2 mm is normal, 6 mm if you believe the AGW crowd.

farmfriend  posted on  2007-09-09 18:25:25 ET  Reply   Untrace   Trace   Private Reply  


End Trace Mode for Comment # 4.

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