360° Coverage : Arctic ice level down to a fifth since 1980

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Arctic ice level down to a fifth since 1980
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Arctic ice level down to a fifth since 1980

Feb 14 2013, 1:58am CST | by

Washington, Feb 14 (IANS) The Arctic has lost more than a third of summer sea-ice volume since a decade ago, and is only a fifth of what it was in 1980, according to satellite observations.

Washington, Feb 14 — The Arctic has lost more than a third of summer sea-ice volume since a decade ago, and is only a fifth of what it was in 1980, according to satellite observations. "What this new...

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1 year ago

Arctic ice level down to a fifth since 1980

Feb 14 2013, 1:58am CST | by

Washington, Feb 14 (IANS) The Arctic has lost more than a third of summer sea-ice volume since a decade ago, and is only a fifth of what it was in 1980, according to satellite observations.

Washington, Feb 14 — The Arctic has lost more than a third of summer sea-ice volume since a decade ago, and is only a fifth of what it was in 1980, according to satellite observations.

"What this new paper shows is that our ice loss estimates may have been too conservative, and that the recent decline is possibly more rapid," said study co-author Axel Schweiger, polar scientist in the University of Washington (UW) Applied Physics Lab.

"Other people had argued that 75 to 80 percent ice volume loss was too aggressive," said Schweiger, the journal Geophysical Research Letters reports.

Arctic sea ice is shrinking and thinning at the same time, Schweiger explained, so it's normal for the summer ice volume to drop faster than the area covered, according to a Washington statement.

The system developed at Washington provides a 34-year monthly picture of what's happening to the total volume of Arctic sea ice.

The Pan-Arctic Ice Ocean Modelling and Assimilation System, or PIOMAS, combines weather records, sea-surface temperature and satellite pictures of ice coverage to compute ice volume.

It then verifies the results with actual thickness measurements from individual moorings or submarines that cruise below the ice.

"Because the ice is so variable, you don't get a full picture of it from any of those observations," Schweiger said.

"So this model is the only way to reconstruct a time series that spans multiple decades."

The UW system also checks its results against five years of precise ice thickness measurements collected by a specialized satellite launched by NASA in 2003.

The Ice, Cloud, and Land Elevation Satellite, or ICESat, measured ice thickness across the Arctic to within 15 inches until spring of 2008.

IANS

Source: IANS

 
Update
2

7 weeks ago

UW, SCCA find 3D mammograms reduce breast cancer false positives

Oct 29 2014 4:05pm CDT | Source: Seattle Business Journal

A new study from the University of Washington and the Seattle Cancer Care Alliance found that while more women are being told to get screened for breast cancer, they may not be getting screened in the best way. For women with dense breast tissue, standard mammograms don't always show what's happening inside of the breast. But using tomosynthesis, or 3D mammograms, these women could improve their health outcomes. The 3D system would also cut costs by reduc ...
Source: Seattle Business Journal   Full article at: Seattle Business Journal
 

 
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8 weeks ago

Amazon's Fifth Employee Tells The Story Of How Jeff Bezos Recruited Him To Do The Toughest Job At Amazon In Its Early Days (AMZN)

Oct 24 2014 9:23am CDT | Source: Business Insider

Tom Schonhoff joined Amazon as its fifth employee in 1995. He had just graduated from the University of Washington with a degree in computer science (he had been working as software developer throughout the 1980s, but never got around to completing college until he was in his early 30s.) Not long after the graduation ceremony, he got a phone call from Jeff Bezos.  At that point, Amazon's site wasn't even live, but Schonhoff had been beta-testing it. Somebody had ...
Source: Business Insider   Full article at: Business Insider
 

 
 

<a href="/latest_stories/all/all/8" rel="author">Luigi Lugmayr</a>
Luigi is the founding Chief Editor of I4U News and brings over 15 years experience in the technology field to the ever evolving and exciting world of gadgets. He started I4U News back in 2000 and evolved it into vibrant technology magazine.
Luigi can be contacted directly at ml@i4u.com. Luigi posts regularly on LuigiMe.com about his experience running I4U.

 

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