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Archive for Thursday, February 26, 2009

Glaciers melting faster than thought

February 26, 2009

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British Environment Minister Hilary Benn, in a yellow parka, joins other ministers and representatives from a dozen nations on a fact-finding visit to the area around Norway’s Troll Research Station on Monday, touring the ice sheet below the Judulsessen massif of rock towers in Antarctica. Scientists reported in Geneva on Wednesday that, in a warming world, Antarctic glaciers are accelerating their dumping of ice into the sea, raising ocean levels.

British Environment Minister Hilary Benn, in a yellow parka, joins other ministers and representatives from a dozen nations on a fact-finding visit to the area around Norway’s Troll Research Station on Monday, touring the ice sheet below the Judulsessen massif of rock towers in Antarctica. Scientists reported in Geneva on Wednesday that, in a warming world, Antarctic glaciers are accelerating their dumping of ice into the sea, raising ocean levels.

— Glaciers in Antarctica are melting faster and across a much wider area than previously thought, a development that threatens to raise sea levels worldwide and force millions of people to flee low-lying areas, scientists said Wednesday.

Researchers once believed that the melting was limited to the Antarctic Peninsula, a narrow tongue of land pointing toward South America. But satellite data and automated weather stations now indicate it is more widespread.

The melting “also extends all the way down to what is called west Antarctica,” said Colin Summerhayes, executive director of the Britain-based Scientific Committee on Antarctic Research.

“That’s unusual and unexpected,” he told The Associated Press in an interview.

By the end of the century, the accelerated melting could cause sea levels to climb by 3 to 5 feet — levels substantially higher than predicted by a major scientific group just two years ago.

Making matters worse, scientists said, the ice shelves that hold the glaciers back from the sea are also weakening.

The report Wednesday from Geneva was a broad summary of two years of research by scientists from 60 countries. Some of the findings were released in earlier reports.

In Washington, as part of an overall update on global warming, top researchers on Wednesday sounded a similar warning to the U.S. Senate about rising temperatures in the Antarctic.

The head of the Intergovernmental Panel on Climate Change, a group set up by the United Nations, told lawmakers on the Environment and Public Works Committee that Earth has about six more years at current rates of carbon dioxide pollution before it is locked into a future of severe global warming.

For years, the continent at the bottom of the world seemed to be the only place on the planet not experiencing climate change. Previous research indicated that temperatures across much of Antarctica were staying the same or slightly cooling.

The report Wednesday was compiled as part of the 2007-2008 International Polar Year, an effort by scientists to conduct intense Arctic and Antarctic research over the past two Antarctic summers.

The big surprise was exactly how much glaciers are melting in western Antarctica, a vast land mass on the Pacific Ocean side of the continent that is next to the South Pole and includes the Antarctic Peninsula.

The biggest of the western glaciers, the Pine Island Glacier, is moving 40 percent faster than it was in the 1970s, discharging water and ice more rapidly into the ocean, said Summerhayes, a member of International Polar Year’s steering committee.

The Smith Glacier, also in west Antarctica, is moving 83 percent faster than in 1992, he said.

The glaciers are slipping into the sea faster because the floating ice shelf that would normally stop them — usually 650 to 980 feet thick — is melting. And the glaciers’ discharge is making a significant contribution to increasing sea levels.

Some people “fear that this is the first signs of an incipient collapse of the west Antarctic ice sheet,” Summerhayes said.

“If the west Antarctica sheet collapses, then we’re looking at a sea level rise of between 3 feet, 4 inches, to nearly 5 feet.”

Together, all the glaciers in west Antarctica are losing a total of around 114 billion tons per year because the melting is much greater than the new snowfall, he said.

“That’s equivalent to the current mass loss from the whole of the Greenland ice sheet,” Summerhayes said.

Looked at another way, it’s more weight than 312,000 Empire State Buildings.

“We didn’t realize it was moving that fast,” he said.

Comments

hawkperchedatriverfront 5 years, 1 month ago

Oh good, now I can have ice water without going to the refrigerator. How long will it take to get to Clinton Lake?

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Liberty_One 5 years, 1 month ago

We should take the environmentalists seriously on this. After all, they've been right so many times in the past...

Also, we know that the governments of the world know exactly what to do to abate the problems of global warming--they've been so good about providing education, health care, Social Security, and the economy, right?

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flamingdragon 5 years, 1 month ago

toke up silly yankees! shop at wal-mart, many millions of chinese are depending on you, everyday. ps- send coal

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barrypenders 5 years, 1 month ago

I will be paying for alot of those dopers mortgages. I don't want them ruining the place. So sorry no potheads in my house.

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logrithmic 5 years, 1 month ago

Its all of those damn smokers! Ban smoking!!


Ban smoking in public places. Legalize marijuana smoking in private places!

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ChiHawkInKS 5 years, 1 month ago

Its all of those damn smokers! Ban smoking!!

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Chris Golledge 5 years, 1 month ago

barrypenders (Anonymous) says…

"What happened to the glaciers that coverd 3/4 of this continent?"

They melted. http://en.wikipedia.org/wiki/File:Pos...

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XD40 5 years, 1 month ago

Don't worry -- the Obamessiah promised during the campaign that he would make the oceans recede and that he would heal the planet. So, no problem.

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remember_username 5 years, 1 month ago

Doesn't seem likely - I can think pretty fast.

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barrypenders 5 years, 1 month ago

What happened to the glaciers that coverd 3/4 of this continent?

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ArumerZwarteHoop 5 years, 1 month ago

either way I am speeding on the way home tonight.

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barrypenders 5 years, 1 month ago

I'm worried about continental drift.

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Flap Doodle 5 years, 1 month ago

Drive 90 and freeze a Yankee.

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logrithmic 5 years, 1 month ago

shhhh... don't tell the rightwing. Might spoil their denial and interfere with their gas guzzling ways!

Make it a great one!

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parrotuya 5 years, 1 month ago

Pretty soon, both coasts will be flooded including D.C. I think that Kansas City, Mo. would make an excellent place to move the U.S. capitol!

Imagine the Lincoln Memorial on Grand Ave. across from Crown Center and the Liberty Memorial! Start buying up those vacant lots! Rev up the PR machine! We wouldn't want St. Louis or Chicago to beat us to it now, would we?

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just_another_bozo_on_this_bus 5 years, 1 month ago

This is just too ideologically inconvenient to be really happening.

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