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Forum Post: Scientists Confirm: Arctic Sea Ice 'Collapse' at Our Door

Posted 1 year ago on Feb. 16, 2013, 6:42 p.m. EST by PeterKropotkin (1050) from Oakland, CA
This content is user submitted and not an official statement

By Jacob Chamberlain

Warming planet and new evidence portend future of ice-free Arctic

The Arctic Sea is experiencing rapid ice loss at a pace so fast that the area will soon be ice-free in warmer months, scientists confirmed in a report this week—showing a collapse in total sea ice volume to one fifth of its level in 1980.

The alarming rate of melting was measured by the European Space Agency’s CryoSat-2 satellite, which uses new technology to measure the thickness of the sea ice in addition to how much of the region is covered.

While ice thickness is more difficult to see with the naked eye, its decline in volume is a harbinger of faster and more alarming ice loss, the scientists urged.

"Not only is the area getting smaller, but also its thickness is decreasing and making the ice more vulnerable to more rapid declines in the future," Christian Haas, a geophysicist at York University in Canada, told NBC News.

The Arctic sea already hit record lows in 2012 with the lowest amount of ice on record, covering only half the average area covered between 1979 and 2012.

The newly released data confirms earlier reports—which included data from NASA's ICESat satellite between 2003 to 2008—that the Arctic, which normally maintains vast amounts of ice throughout the year, may soon be ice-free during warmer months. Another team of scientists came to the same conclusion in September using the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the University of Washington’s Polar Science Center.

"As the satellite measurements show that not only the area decreases but also its thickness, it is actually becoming more likely that the ice will disappear sooner rather than later," Haas told NBC News.

Researchers published the study online in Geophysical Research Letters. "Other people had argued that 75 to 80 percent ice volume loss was too aggressive," said co-author Axel Schweiger in a press release. "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."

The Natural Environment Research Council (NERC), commented on the new findings in a press release:

Arctic sea ice volume has declined by 36 per cent in the autumn and 9 per cent in the winter between 2003 and 2012, a UK-led team of scientists has discovered….

The findings confirm the continuing decline in Arctic sea-ice volume simulated by the Pan-Arctic Ice-Ocean Modelling & Assimilation System (PIOMAS), which estimates the volume of Arctic sea ice and had been checked using earlier submarine, mooring, and satellite observations until 2008. BBC News adds more details:

The data gathered so far by Cryosat were compared with information compiled by the US space agency's (Nasa) Icesat spacecraft in the mid-2000s.

For autumn (October/November), the analysis found the Icesat years from 2003 to 2008 to have recorded an average volume of 11,900 cubic km.

But from 2010 to 2012, this average had dropped to 7,600 cu km - a decline of 4,300 cu km - as observed by Cryosat.

For winter (February/March), the 2003 to 2008 period saw an average of 16,300 cu km, dropping to 14,800 cu km between 2010 and 2012 - a difference of 1,500 cu km.

The smaller relative decline in winter volume highlights an interesting "negative feedback".

http://www.commondreams.org/headline/2013/02/15-6

8 Comments

8 Comments


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[-] 1 points by Kavatz (464) from Edmonton, AB 1 year ago

Great time to kill the future for short-term gains. Let's melt it all and plunder those resources before someone else does! Go Capitalism! Then when we're all fuct, our great leaders can pack us into camps and ration everything to ensure our survival.

[-] 1 points by beautifulworld (21407) 1 year ago

That is damn scary.

[-] 0 points by vaprosvyeh (-400) 1 year ago

http://nsidc.org/arcticseaicenews/

Seems to me that the Arctic Sea Ice is on track to get back to well within the standard 2 + or- deviation.

[-] 0 points by vaprosvyeh (-400) 1 year ago

http://www.sciencedaily.com/releases/2008/06/080625140649.htm

Weird....in 2008 they found evidence that underwater volcanoes were erupting under the Arctic Ice, at depths and pressures that scientists had believed WERE NOT POSSIBLE.

Quote-

"More importantly, it is very difficult to build up the amount of steam and carbon dioxide gas in the magma that would be required to explode a mass of rock up into the water column. (Far less energy is needed to do so in air.) In fact, the buildup of CO2 in magma in the sea crust would have to be ten times higher than anyone has ever observed in seafloor samples."

"The findings from the Gakkel Ridge expedition appear to show that deep-sea pyroclastic eruptions can and do happen. "The circulation and plumbing of the Gakkel Ridge might be different," said Reves-Sohn. "There must be a lot more volatiles in the system than we thought." The research team hypothesizes that excess gas may be building up like foam or froth near the ceiling of the magma chambers beneath the crust, waiting to pop like champagne beneath a cork."

"Are pyroclastic eruptions more common than we thought, or is there something special about the conditions along the Gakkel Ridge?" said Reves-Sohn. "That is our next question."


The CO2 buildup in sea floor magma "would have to be 10 times higher" than ever observed. .....

[-] -2 points by DeathsHead1 (-111) 1 year ago

Okay.so what should we do?

[-] 1 points by NVPHIL (664) 1 year ago

One problem is ice reflects sunlight while water absorbs it. So one thing we could try is to find other ways to reflect light back to space until the ice caps refreeze. I admit to being terrified that we will screw the balance of our climate but we've already done that in a way that will kill us.

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[-] 1 points by NVPHIL (664) 1 year ago

We need to start investing in projects to reverse the trend. We've ignored the issue to long for getting rid of fossil fuels to be enough, even though it still is critical.

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