Over 2 Trillio tons of ice melted in arctic since '03
Posted Tue Dec 16, 2008 4:10am PST

WASHINGTON - More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming.

More than half of the loss of landlocked ice in the past five years has occurred in Greenland, based on measurements of ice weight by NASA's GRACE satellite, said NASA geophysicist Scott Luthcke. The water melting from Greenland in the past five years would fill up about 11 Chesapeake Bays, he said, and the Greenland melt seems to be accelerating.

NASA scientists planned to present their findings Thursday at the American Geophysical Union conference in San Francisco. Luthcke said Greenland figures for the summer of 2008 aren't complete yet, but this year's ice loss, while still significant, won't be as severe as 2007.

The news was better for Alaska. After a precipitous drop in 2005, land ice increased slightly in 2008 because of large winter snowfalls, Luthcke said. Since 2003, when the NASA satellite started taking measurements, Alaska has lost 400 billion tons of land ice.

In assessing climate change, scientists generally look at several years to determine the overall trend.

Melting of land ice, unlike sea ice, increases sea levels very slightly. In the 1990s, Greenland didn't add to world sea level rise; now that island is adding about half a millimeter of sea level rise a year, NASA ice scientist Jay Zwally said in a telephone interview from the conference.

Between Greenland, Antarctica and Alaska, melting land ice has raised global sea levels about one-fifth of an inch in the past five years, Luthcke said. Sea levels also rise from water expanding as it warms.

Other research, being presented this week at the geophysical meeting point to more melting concerns from global warming, especially with sea ice.

"It's not getting better; it's continuing to show strong signs of warming and amplification," Zwally said. "There's no reversal taking place."

Scientists studying sea ice will announce that parts of the Arctic north of Alaska were 9 to 10 degrees warmer this past fall, a strong early indication of what researchers call the Arctic amplification effect. That's when the Arctic warms faster than predicted, and warming there is accelerating faster than elsewhere on the globe.

As sea ice melts, the Arctic waters absorb more heat in the summer, having lost the reflective powers of vast packs of white ice. That absorbed heat is released into the air in the fall. That has led to autumn temperatures in the last several years that are six to 10 degrees warmer than they were in the 1980s, said research scientist Julienne Stroeve at the National Snow and Ice Data Center in Boulder, Colo.

That's a strong and early impact of global warming, she said.

"The pace of change is starting to outstrip our ability to keep up with it, in terms of our understanding of it," said Mark Serreze, senior scientist at the National Snow and Ice Data Center in Boulder, Colo., a co-author of the Arctic amplification study.

Two other studies coming out at the conference assess how Arctic thawing is releasing methane — the second most potent greenhouse gas. One study shows that the loss of sea ice warms the water, which warms the permafrost on nearby land in Alaska, thus producing methane, Stroeve says.

A second study suggests even larger amounts of frozen methane are trapped in lakebeds and sea bottoms around Siberia and they are starting to bubble to the surface in some spots in alarming amounts, said Igor Semiletov, a professor at the University of Alaska in Fairbanks. In late summer, Semiletov found methane bubbling up from parts of the East Siberian Sea and Laptev Sea at levels that were 10 times higher than they were in the mid-1990s, he said based on a study this summer.

The amounts of methane in the region could dramatically increase global warming if they get released, he said.

That, Semiletov said, "should alarm people."

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Two trillion tons of ice huh? So then if we can find four trillion tons of beer we'll be in business.

I kid. I kid because in the face of unfortunate circumstances, one must do all they can and once they can do no more....laugh.

^;)

wow :lol: noone posted here ! what a surprise :lol: really who cares -_-

ps...I got to go and talk about celebs hehe :lol:

I think people care, I just think that it's like....what can you say? You can get angry or you can just absorb this evidence and go on with your life, making the appropriate changes for yourself though....so that you can impact the environment positively for future generations, so that our children's children still get to see green pastures and snow-capped mountains and clean beaches....and still breathe.

P.S. I don't like beer. Let's try 4 trillion tons of tea instead. ;D

I don't think so :shakehead: I go for the beer :angel:

What if we make it Long Island Iced Tea? ;)

Yeahs I want some of that long island Iced Tea its one of my favorite thing to drink...and beer once in the bleu. :P

Ya can't go wrong with this compromise. How bout it, Ray?

^it sounds good to me :lol:

How did this thread go from the world's slowly melting glaciers, to talk about beer? :lol:

Because as the world is ending, the best thing to do is just knock one back and dance. We're simply preparing. ;)

I'm thinkin.. the apocalypse is gonna be the wildest party ever, man.

LOL JUDGEMENT DAY :ph43r:

:lol: wow this thread it's out of control LMAO :lol:

Leave me outta the celebrating the end of the world...

I'll be busy hiding under my bed... :scared:

Wuss :whistle: