Tuesday, November 29, 2016

Ice sheet collapsing

 
Ice sheet collapsing
The Antarctic and Greenland ice sheets contain more than 99 percent of the freshwater ice on Earth. Previous papers have shown that the melting of the West Antarctic Ice Sheet is inevitable, and it could raise sea levels by …
The Verge · 25 minutes ago
The Pine Island Glacier, part of the ice shelf that bounds the West Antarctic Ice Sheet, is one of two glaciers that researchers believe are most likely to …
Science Daily · 1 day ago
more ice sheets are melting -- especially the ones located in the West Antarctic. Recently, it shows that the West Antarctic Ice Sheet is breaking apart …
Science World Report · 12 hours ago
The finding has researchers worried this rift might contribute to the inevitable collapse of the West Antarctic Ice Sheet. The 20-mile long crack can be …
Inhabitat · 5 hours ago
Ice sheets breaking off Antarctica isn’t anything particularly ... More than half of the world’s fresh water is frozen in Antarctica, and if the entire West Antarctic Ice Sheet collapses, it would result in a sea-level rise of about 3 …
iflscience.com · 4 hours ago
We’ve already talked about the Arctic and how climate change is melting the North Pole at worrying speed — it could raise the ocean by 20 feet. But if …
Yahoo News · 3 hours ago
A new rift in West Antarctica’s Pine Island Glacier, photographed during a NASA Operation IceBridge flyover on November 4th, 2016. Image: …
Gizmodo · 16 hours ago
"It's generally accepted that it's no longer a question of whether the West Antarctic Ice Sheet will melt, it's a question of when." A key glacier in Antarctica is …
thescienceexplorer.com · 6 hours ago
Ian Howat, lead researcher and associate professor of earth sciences, says, "It's generally accepted that it's no longer a question of whether the …
diy-home-garden.com · 8 hours ago
West Antarctica's largest glacier may have started retreating as early as the 1940s Washington DC - infoZine - The present-day thinning and retreat of Pine Island Glacier, one of the largest and fastest shrinking glaciers …
Kansas City infoZine · 11/26/2016
The West Antarctic Ice Sheet is one of the largest potential sources of water that will contribute to rising sea levels. Over the past 40 years, …
Science Daily · 11/23/2016
The West Antarctic Ice Sheet is one of the largest potential sources of water that will contribute to rising sea levels. Over the past 40 years, glaciers flowing into the Amundsen Sea sector of the ice sheet have thinned at an …
Space Daily · 11/25/2016
SEE ALSO: Large parts of West Antarctic Ice Sheet could collapse 'in our lifetimes' The high winds that hit on Monday, and are continuing in some …
Mashable · 5 hours ago
The West Antarctic ice sheet holds enough water to raise the world’s oceans an estimated 10 feet, and it’s shrinking. Scientists analyzing the …
PBS · 11/26/2016
The present-day thinning and retreat of Pine Island Glacier, one of the largest and fastest shrinking glaciers of the West Antarctic Ice Sheet, may …
www.nsf.gov · 11/27/2016
The AGU reports: “It’s generally accepted that it’s no longer a question of whether the West Antarctic Ice Sheet will melt, it’s a question of when,” said Ian Howat, associate professor of Earth sciences at Ohio State and lead …
Daily Kos · 21 hours ago
... research by the British Antarctic Survey also showed that the present day loss of the Pine Island Glacier on the West Antarctic Ice Sheet has been …
notalotofpeopleknowthat.wordpress.com · 11/25/2016
In 2009, Al Gore announced ‘there is a 75 per cent chance that the entire north polar ice cap, during the summer months, could be completely ice-free …
news.valubit.com · 11/25/2016
Unlike extremely doubtful human warming influence upon Antarctic glaciers, recent man-made cooling of the political climate is indisputable. …
cfact.org · 11/21/2016
The now President-elect has repeatedly expressed that the U.S. shouldn't waste "financial resources" on climate change and should instead use …
perspectivabetica.com · 11/20/2016
The northernmost Antarctic Peninsula, viewed from the northeast aboard the IceBridge research aircraft on an Oct. 17, 2016, flight toward the …
NASA Climate · 11/18/2016
Copyright © 2012-2016 Los Alamos Daily Post. This Site and all information contained here including, but not limited to, news stories, photographs, video, charts, graphs and graphics is the property of the Los Alamos …
Los Alamos Daily Post · 7 hours ago
The West Antarctic Ice Sheet is believed to be breaking up from the inside out, which could lead to rising sea levels in the future. In 2015, the Pine Island Glacier lost 225 square miles of iceberg due to inland rifts caused by a …
onenewspage.com · 1 hour ago
Dr Ian Howat, who led the study, said: 'It's generally accepted that it's no longer a question of whether the West Antarctic Ice Sheet will melt, …
Daily Mail · 1 day ago
... Antarctic ice sheets breaking? Last year, a 225 square mile iceberg broke off from West Antarctica’s Pine Island Glacier. Scientists …
The Daily Express · 11 hours ago
Bird's eye view of the Amundsen sea embayment, where major glaciers of the West Antarctic ice sheet empty into the ocean. Rift in Pine Island Glacier ice shelf, West Antarctica, photographed from the air during a NASA …
Flapship · 8 hours ago
part of the ice shelf that bounds the West Antarctic Ice Sheet. Evidence suggests that the glacier is breaking apart from the inside and, even worse, a second inland rift is forming. The West Antarctic Ice Sheet has always been a …
futurism.com · 4 hours ago
(Photo by DeAgostini/Getty Images) ‘It’s generally accepted that it’s no longer a question of whether the West Antarctic Ice Sheet will melt, it’s a question of when.’ ‘This kind of rifting behavior provides another …
Metro · 4 hours ago
which forms part of the ice shelf that bounds the West Antarctic Ice Sheet. Recently, while reviewing satellite images taken before the giant iceberg …
Live Science · 13 hours ago
A significant glacier that bounds the West Antarctic Ice Sheet is cracking from the inside out. The Pine Island Glacier is a significant body of ice that …
The Christian Science Monitor · 1 day ago
... Antarctica is evidence large parts of the West Antarctic ice sheet could collapse in our lifetimes. Scientists say a giant crack deep beneath the ice in Antarctica is evidence large parts of the West Antarctic ice sheet could …
WYFF 4 · 1 hour ago
The Antarctica Peninsula has been referred to as Antarctica’s third ice sheet. Following behind the East and West Antarctic ice sheet in size, one might be …
blogs.ei.columbia.edu · 11/24/2016
The observation opens up the possibility that many more deep rifts could form and allow the West Antarctic Ice Sheet to break up more quickly, the …

This Antarctic glacier is cracking from the inside out — and that’s bad news for all of us

Because of rising sea levels

A rift in Pine Island Glacier ice shelf in West Antarctica, photographed on November 4th.
NASA/Nathan Kurtz
A massive glacier at the edge of the West Antarctic Ice Sheet is cracking from the inside out at accelerating speed. That’s alarming because this glacier — and others — function like corks in a bottle: they keep the ice from flowing into the sea, which would raise sea levels by several feet.
The glacier, which is described in a paper published yesterday in Geophysical Research Letters, is called Pine Island Glacier. In 2015, a 224-square-mile iceberg broke off from the glacier. After studying satellite images before and after the event, researchers at Ohio State University found that in 2013, a rift formed at the base of the ice shelf, 20 miles inland. The rift worked its way up for two years until it caused the iceberg to break off.
Icebergs do separate from ice sheets in the Antarctic on a fairly regular basis. This one, though, is special. It confirmed what glaciologists have long been suspecting: that the ice shelf is weakening. But it also shows that the ice retreat is happening farther inland than scientists had previously observed.
The 224-square-mile iceberg that broke off from the Pine Island Glacier in 2015.
GIF from Ohio State University video
“It’s generally accepted that it’s no longer a question of whether the West Antarctic Ice Sheet will melt, it’s a question of when,” study leader Ian Howat, associate professor of Earth sciences at Ohio State, said in a statement. If things continue the way they are, glaciers will keep melting, and West Antarctica will significantly collapse “in our lifetimes.”
In the case of the 2015 iceberg, researchers believe that the rift began deep down the ice shelf, where warming waters are eating away at the ice. That’s a new threat to the Antarctica ice sheet, where rifts usually form at the margins, not deep inland. Similar breakups had been observed in Greenland and the global consequences of melting ice in these regions are huge.
The Antarctic and Greenland ice sheets contain more than 99 percent of the freshwater ice on Earth. Previous papers have shown that the melting of the West Antarctic Ice Sheet is inevitable, and it could raise sea levels by as much as 10 feet. In the US, that would mean that cities like New York and Miami would go underwater.
 
 
 

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