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Archive for Wednesday, March 19, 2008

Scientists: New Arctic sea ice too thin

March 19, 2008

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— Critical Arctic sea ice this winter made a tenuous partial recovery from last summer's record melt, federal scientists said Tuesday.

But that's an illusion, like a Hollywood movie set, scientist Walter Meier of the National Snow and Ice Data Center said. The ice is very thin and vulnerable to heavy melting again this summer.

Overall, Arctic sea ice has shrunk precipitously in the past decade, and scientists blame global warming caused by humans.

Last summer, Arctic ice shrank to an area that was 27 percent smaller than the previous record. This winter, it recovered to a maximum of 5.8 million square miles, up 4 percent and the most since 2003, NASA ice scientist Josefino Comiso said. It is still a bit below the long-term average level for this time of year.

"What's going on underneath the surface is really the key thing," Meier said in an interview following a news conference. What's happening is not enough freezing.

Summer Arctic sea ice is important because it's intricately connected to weather conditions elsewhere on the globe. It affects wind patterns, temperatures farther south and even the Gulf Stream, acting as a sort of refrigerator for the globe, according to scientists.

"What happens there matters here," said Waleed Abdalati, chief ice scientist at NASA's Goddard Space Flight Center in Greenbelt, Md. "Climate for the period of human record has depended on the ice being there."

Viewing the Arctic from space via NASA satellites might make you think the Arctic ice cover is on its way back.

But more than 70 percent of that sea ice is new, thin and salty, having formed only since September, Comiso said. The more important ice is perennial sea ice that lasts through the summer, and that ice has hit record low levels.

Compared with the 1980s, the Arctic has lost more than half of its perennial sea ice and three-quarters of its "tough as nails" sea ice that is 6 years or older, Meier said. The amount of lost old sea ice is twice the area of the state of Texas, he said.

On top of that, a change in Arctic atmospheric pressure this winter is pushing a large amount of the valuable older ice out of the Arctic to melt, Meier said.

That means in the summer when temperatures warm, expect lots of melting, the scientists said.

"We're in for a world of hurt this summer," ice center senior scientist Mark Serreze told The Associated Press. Depending on the weather, there could be as much melting this year as last, maybe more, Serreze and Meier said.

At the South Pole, in Antarctica, sea ice seems stable, even slightly above normal, the scientists reported. However, ice levels in Antarctica always are quite different from the Arctic and aren't as connected to the world's weather.

Comments

gr 6 years, 9 months ago

"But more than 70 percent of that sea ice is new, thin and salty, having formed only since September, Comiso said."

Ummm, no ice, then ice. Doesn't that mean it has to be new, most likely thin, and after September?

It was bad that it disappeared, but now that it's forming back, it's still bad. If it even lasts through the summer and expands, I'm sure the alarmists will say that's bad, too.

"We're in for a world of hurt this summer", but if not, if the summer is the best it's ever been, they will say that's bad news, global warming predicts such, or otherwise will dismiss it.

"At the South Pole, in Antarctica, sea ice seems stable, even slightly above normal" Now for the dismissing: "However, ice levels in Antarctica always are quite different from the Arctic and aren't as connected to the world's weather." Yep.

http://epw.senate.gov/public/index.cfm?FuseAction=Minority.Blogs&ContentRecord_id=5CEAEDB7-802A-23AD-4BFE-9E32747616F9 "Kenneth Tapping of our own National Research Council, who oversees a giant radio telescope focused on the sun, is convinced we are in for a long period of severely cold weather if sunspot activity does not pick up soon."

"The ice is about 10 to 20 centimetres thicker than last year, so that's a significant increase,"

"We have to go back 15 years to find ice expansion so far south."

"On decadal-to-century timescales, periods around AD 750, 1000, 1400, and 1750 were all equally warm, or warmer. The warmest summers in this new reconstruction occur in a 200-year period centred on AD 1000."

"The new Torneträsk summer temperature reconstruction shows a trend of -0.3°C over the last 1,500 years."

"Now, Canadian scientists are seeking additional funding for more and better "eyes" with which to observe our sun, which has a bigger impact on Earth's climate than all the tailpipes and smokestacks on our planet combined. And they're worried about global cooling, not warming. "

"Error number 36 in the movie An Inconvenient Truth Al Gore says the polar bear need more ice to survive... Now we have a lot of ice, but the polar bear is starving..."

Build a coal plant - save the polar bears!

SettingTheRecordStraight 6 years, 9 months ago

"Scientists: New Arctic sea ice too thin"

Cope with it. There is absolutely nothing humans can do to change global temperature swings.

Bladerunner 6 years, 9 months ago

Lets put an end to arctic ice in our life times.

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