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Leeds Increased volcanic activity is linked to ice melted by the effects of global warming, a study has found.
So much ice in Iceland has melted in the past century that the pressure on the land beneath has lessened, which allows more of the rock deep in the ground to turn to magma. Until the ice melted, the pressure was so intense that the rock remained solid.
Carolina Pagli, of the University of Leeds, led research which calculated that over the past century the production of magma had increased by 10 per cent.
The research team, reporting their findings in the journal Geophysical Research Letters, said an extra 1.4 cu km of magma has been created under the Vatnajökull ice-cap in the past 100 years.
Since 1890 the ice-cap has lost 10 per cent of its mass, which has allowed the land to rise by up to 25m (82ft) a year. The volume lost between 1890 and 2003 is estimated at 435 cu km.
How long it will take before the extra magma erupts in Iceland and other regions of the North Atlantic Ridge remains uncertain. It is formed at depths of 15 to 112 km, and Dr Pagli estimated it will be a century or two before it is ejected by volcanoes.
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I cannot believe this rubbish - melting ice causes volcanoes, indeed. If I wear sunglasses, would this affect the Sun?
Surely, the "team" has it backwards. Volcanoes cause ocean warming and melting ice.
It is planetary mechanics which drives the climate, not puny mankind!
Charles S. Opalek, PE, Somerdale, USA
Try reporting up to 25 mm (an inch) a year as the correct rate of observed uplift stated in this paper. However this is still a very impressive rate of uplift even compared with the end of the last ice age and should ring a few alarm bells.
Though as usual a number of the comments which have already posted about this report, go in for wishful thinking when it comes to global warming - it is rate of change, compounded by a growing population of over six billion people, that is key and not for example that a very long time ago in the past the Earth has had long periods with much warmer climates than we currently have.
David Nowell FGS, New Barnet, Hertfordshire, England
So what is the name of this new 10,000' tall mountain? This is truly amazing - and only 10% of the ice cap has melted. Once the remaining 90% melts and there is a 100,000' tall mountain no one will be able to deny global warming. Take that you deniers!
Greg, Chicago, IL
I live in Saskatchewan, Canada. I can assure everyone here that when the snow melts in the spring , our flat plains turn into rolling hills. And then back again, after the first flakes fall.... believe me. I've seen it.
Kate, Saskatoon, Saskatchewan
Linked yes, but as always viewed in the wrong direction by the "blame everything on global warming" loby. Call me old fashioned but usually snow and ice melts as a result of increased temperature such that could be caused by increased volcanic activity.
Max, Savoie, France
How can anyone argue that this article omits causation. It's obvious. Global warming makes for less ice to hold down the big, heavy rock, allowing more hot magma to develop. Cause, meet Effect. Don't let anyone try to tell you that increased build up of magma could be the cause of more melting ice. That's just too fantastic.
Here's another example. Where I live, in the northern US, this winter, the temperatures have been lower than they have been for decades. We have had more snowfall than we have seen in the past nearly 40 years. These conditions, as all but GW deniers well know, is one of the direct, predictable results of carbon dioxide emissions, which cause bitter cold and record snowfall when they are not overheating and melting things.
I personally have observed that the mountains visible from my living room window have become shorter, due to the massive snow accumulations. This process seems to be reversing itself due to the GW-caused melting.
jprimmer, South Ryegate, Vermont, USA
Interesting that physics had to be turned on it's ear to get this all to work out. For example, the author claims that the pressure from the ice prevented the rock from turning into magma... in fact, the pressure should have increased the amount of rock that was forming magma. As Boyle demonstrated to us many years ago, that when one adds pressure to a constant volume, the the temperature rises!
BOB, Tucson, Arizona
Another group of university quasi-scientists grovelling for funding by piggy-backing on the Global Warming theory.
There have been four Ice Ages in the Earth's history, and outside those periods the Earth has been largely ice free - including the Arctic and Antarctic areas.
During the last Ice Age - about 11,000 years ago - The huge weight (volume) of ice that formed over the Northern area of the Eurasian Tectonic Plate gradually raised the Southern area of the plate, which had far less ice. ( Rather like a see-saw) Since then, the ice has receded, and the Northern area is now rising, whilst the Southern area sinks - thus the plate plate returns to its former state.
Global Warming the cause - Humbug!
Desmond, Barnstaple, Devon
I don't see the cause and effect. Two things have occured, decreasing ice sheets (I'll take your dubious word for it) and increased volcanic activity. You have not in any way even attemped to show causation. There are many, many other possible theories for the increased volcanism. Have you ever heard of plate tectonics? Can you rule that out or even assign a percentage or responsibility to one or the other? No you can't. Maybe a land mass rising at 82' ! per year will cause ice to cleave off and break into smaller bits, thereby causing it to melt faster. One more thing, a 10% decrease in the ice causes and 82' per year uplift? That's like holding down an elephant with a thumb tack.
Ralph, Tyrone, PA
Many of your readers may not be aware that it is very well established that volcanic eruptions spew large amounts of dust into the atmosphere, blocking and reflecting incoming sunlight, and thus causing global cooling. It is interesting that this may possibly represent a feedback mechanism that can ultimately protect the world from excessive global warming. If so, we may all be able to breathe a sigh of relief.
Dr. Robert Koslover, Tyler, Texas, USA
Pretty impressive! The area that was under the ice cap has been rising by 25 meters per year, presumably for the last 118 years. So now there is a mountain there nearly 10,000 ft tall where before there was a flat plain? Remarkable!
Michael Ryan, gloucester Pt., Virginia, USA
This does not pass the sanity test.
Maybe it's the magma that is melting the ice? If so, their "global warming" theory is no good.
A land mass rising up to 82' a year - if that were true, we'd see a lot more than what we're seeing.
Finally, why is Greenland's ice mass increasing? The two countries are very close to each other, get the same reactions from the Atlantic Ridge
nare, Mpls, MN