Massive Antarctic Glacier Has Entered Irriversible Melt, Could Add Up To 1 Centimeter

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Massive Antarctic Glacier Has Entered Irriversible Melt, Could Add Up To 1 Centimeter To Sea Level
After last week’s Arctic-fueled cold snap — dubbed the ‘Polar Vortex’ — brought freezing temperatures and claims of climate change denial to the attention of the general public, the situation has now returned to normal. Or the new normal at least — in which climate change happens out-of-sight and out-of-mind for many Americans.

One of the latest indicators that climate change is progressing whether we’re looking or not comes from a study in the journal Nature Climate Change finding that one of the largest glaciers in Antarctica has started melting irreversibly.

An international team of researchers found that Antarctica’s Pine Island Glacier, the single largest Antarctic contributor to sea-level rise, could add as much as one centimeter to ocean levels within the next 20 years.

The glacier “has started a phase of self-sustained retreat and will irreversibly continue its decline,” Gael Durand, a glaciologist with France’s Grenoble Alps University, told Australian Broadcasting Corporation.

The team of researchers used state-of-the-art ice-flow models and field observations to help determine how the glacier’s ice flows will change in coming years.

“At the Pine Island Glacier we have seen that not only is more ice flowing from the glacier into the ocean, but it’s also flowing faster across the grounding line — the boundary between the grounded ice and the floating ice,” Dr. G. Hilmar Gudmundsson, a researcher on the project, told Planet Earth Magazine.

The glaciologists found that that glacier’s grounding line, which has already receded up to 10 kilometers this century, is “probably engaged in an unstable 40-kilometer retreat.”

Pine Island Glacier is one of the main avenues for ice to flow from Antarctica into the ocean. As the tip of the glacier melts and thins, the glacier is discharging more ice into the sea. The glacier has been losing about 20 billion tonnes of ice a year for the last two decades, but scientists see this rising to 100 billion tons a year in the coming decades.

Pine Island Glacier accounts for about one-fourth of the total ice melt from the West Antarctic Ice Sheet. If the entire West Antarctic Ice Sheet retreated it could cause sea level to rise by more than 10 feet. The entire Antarctic Ice Sheet, covering an area bigger than the continental U.S., contains nine-tenths of the ice on Earth and could raise sea level by over 200 feet if it melted.


Massive Antarctic Glacier Has Entered Irriversible Melt, Could Add Up To 1 Centimeter To Sea Level | ThinkProgress
 
Massive Antarctic Glacier Has Entered Irriversible Melt, Could Add Up To 1 Centimeter To Sea Level
After last week’s Arctic-fueled cold snap — dubbed the ‘Polar Vortex’ — brought freezing temperatures and claims of climate change denial to the attention of the general public, the situation has now returned to normal. Or the new normal at least — in which climate change happens out-of-sight and out-of-mind for many Americans.

One of the latest indicators that climate change is progressing whether we’re looking or not comes from a study in the journal Nature Climate Change finding that one of the largest glaciers in Antarctica has started melting irreversibly.

An international team of researchers found that Antarctica’s Pine Island Glacier, the single largest Antarctic contributor to sea-level rise, could add as much as one centimeter to ocean levels within the next 20 years.

The glacier “has started a phase of self-sustained retreat and will irreversibly continue its decline,” Gael Durand, a glaciologist with France’s Grenoble Alps University, told Australian Broadcasting Corporation.

The team of researchers used state-of-the-art ice-flow models and field observations to help determine how the glacier’s ice flows will change in coming years.

“At the Pine Island Glacier we have seen that not only is more ice flowing from the glacier into the ocean, but it’s also flowing faster across the grounding line — the boundary between the grounded ice and the floating ice,” Dr. G. Hilmar Gudmundsson, a researcher on the project, told Planet Earth Magazine.

The glaciologists found that that glacier’s grounding line, which has already receded up to 10 kilometers this century, is “probably engaged in an unstable 40-kilometer retreat.”

Pine Island Glacier is one of the main avenues for ice to flow from Antarctica into the ocean. As the tip of the glacier melts and thins, the glacier is discharging more ice into the sea. The glacier has been losing about 20 billion tonnes of ice a year for the last two decades, but scientists see this rising to 100 billion tons a year in the coming decades.

Pine Island Glacier accounts for about one-fourth of the total ice melt from the West Antarctic Ice Sheet. If the entire West Antarctic Ice Sheet retreated it could cause sea level to rise by more than 10 feet. The entire Antarctic Ice Sheet, covering an area bigger than the continental U.S., contains nine-tenths of the ice on Earth and could raise sea level by over 200 feet if it melted.


Massive Antarctic Glacier Has Entered Irriversible Melt, Could Add Up To 1 Centimeter To Sea Level | ThinkProgress

:disbelief:
 
When ice ages have warm periods, glaciers melt. It also happens when ice ages are moving toward an ending.
 
I absolutely refuse to go to a Stink Progress article.

No way I'll give them the benefit of my traffic.

If you got another link, post it. Otherwise, have a nice breakdown
 
This melting is caused by man.. Specifically the massive increase of glacier scientists stomping around on the PIslandGlacier and drilling numerous holes in the ice.

Stop drilling holes and the crisis is solved..
 
Maybe a picture and some numbers??

Scientists: Record Low Temperature Recorded in Antarctica
Reuters
December 09, 2013


SAN FRANCISCO — The Arctic air blasting the eastern United States is positively balmy compared to the record minus 136 degrees Fahrenheit (minus 93 degrees Celsius) temperature measured in Antarctica in August 2010, according to research released on Monday.

Scientists made the discovery while analyzing 32 years of global surface temperatures recorded by satellites.

They found that a high ridge in the East Antarctic Plateau contains pockets of trapped air that dipped as low as minus 136 Fahrenheit on Aug. 10, 2010, researchers said at the American Geophysical Union meeting in San Francisco.

The previous record low was minus 128.6 F (minus 89.2 C), set in 1983 at the Russian Vostok Research Station in East Antarctica, said Ted Scambos, lead scientist at the National Snow and Ice Data Center in Boulder, Colorado.

Hey.. If -136degF isn't enough to save this puppy --- I don't think 1.2degF of global warming was gonna matter.. DO YOU???

Caption for photo below..

Criss-crossing crevasses near the grounding line of Pine Island Glacier, along Antarctica’s Amundsen Sea Coast. (Photo courtesy Ian Joughin)

FA05CEF9-B640-4911-A08A-CEFB72CB8EA7_mw1024_n_s.jpg


GOT to be that 1.2degF of global warming.
 
Nope.. I don't do ice.. But I DO DO surface temperature records.. And in THIS case --- it's important...

pine_island_glacier_sea_temp.jpg


Kinda speaks for itself dont it? Seems like we need a new theory here..
 
Maybe a picture and some numbers??

Scientists: Record Low Temperature Recorded in Antarctica
Reuters
December 09, 2013


SAN FRANCISCO — The Arctic air blasting the eastern United States is positively balmy compared to the record minus 136 degrees Fahrenheit (minus 93 degrees Celsius) temperature measured in Antarctica in August 2010, according to research released on Monday.

Scientists made the discovery while analyzing 32 years of global surface temperatures recorded by satellites.

They found that a high ridge in the East Antarctic Plateau contains pockets of trapped air that dipped as low as minus 136 Fahrenheit on Aug. 10, 2010, researchers said at the American Geophysical Union meeting in San Francisco.

The previous record low was minus 128.6 F (minus 89.2 C), set in 1983 at the Russian Vostok Research Station in East Antarctica, said Ted Scambos, lead scientist at the National Snow and Ice Data Center in Boulder, Colorado.
Hey.. If -136degF isn't enough to save this puppy --- I don't think 1.2degF of global warming was gonna matter.. DO YOU???

Caption for photo below..

Criss-crossing crevasses near the grounding line of Pine Island Glacier, along Antarctica’s Amundsen Sea Coast. (Photo courtesy Ian Joughin)

FA05CEF9-B640-4911-A08A-CEFB72CB8EA7_mw1024_n_s.jpg


GOT to be that 1.2degF of global warming.


Glaciers calve, so what`s that got to do with what mankind is doing?
Calving is not the same process as melting anyways.
The Pine Island glacier that calved hasn`t "melted" it`s a junk of ice that was pushed way out and then broke off.
Ice does not bend like rubber so it breaks.
_72270000_72269999.jpg

PIG recently calved an iceberg more than 700 sq km in area
If that was due to "melting" then it would not be a 700 km^2 junk which is still frozen solid at the far end.
The "skepticalscience" blog subscribers freak out every time a glacier calves but if entire continents freeze over then it`s "just...blah blah blah"
 
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AGWCult Computer Model Program

<insert weather event> is due to man made Global warming
 
Maybe a picture and some numbers??

Scientists: Record Low Temperature Recorded in Antarctica
Reuters
December 09, 2013


SAN FRANCISCO &#8212; The Arctic air blasting the eastern United States is positively balmy compared to the record minus 136 degrees Fahrenheit (minus 93 degrees Celsius) temperature measured in Antarctica in August 2010, according to research released on Monday.

Scientists made the discovery while analyzing 32 years of global surface temperatures recorded by satellites.

They found that a high ridge in the East Antarctic Plateau contains pockets of trapped air that dipped as low as minus 136 Fahrenheit on Aug. 10, 2010, researchers said at the American Geophysical Union meeting in San Francisco.

The previous record low was minus 128.6 F (minus 89.2 C), set in 1983 at the Russian Vostok Research Station in East Antarctica, said Ted Scambos, lead scientist at the National Snow and Ice Data Center in Boulder, Colorado.
Hey.. If -136degF isn't enough to save this puppy --- I don't think 1.2degF of global warming was gonna matter.. DO YOU???

Caption for photo below..

Criss-crossing crevasses near the grounding line of Pine Island Glacier, along Antarctica&#8217;s Amundsen Sea Coast. (Photo courtesy Ian Joughin)

FA05CEF9-B640-4911-A08A-CEFB72CB8EA7_mw1024_n_s.jpg


GOT to be that 1.2degF of global warming.


Glaciers calve, so what`s that got to do with what mankind is doing?
Calving is not the same process as melting anyways.
The Pine Island glacier that calved hasn`t "melted" it`s a junk of ice that was pushed way out and then broke off.
Ice does not bend like rubber so it breaks.
_72270000_72269999.jpg

PIG recently calved an iceberg more than 700 sq km in area
If that was due to "melting" then it would not be a 700 km^2 junk which is still frozen solid at the far end.
The "skepticalscience" blog subscribers freak out every time a glacier calves but if entire continents freeze over then it`s "just...blah blah blah"

Can you explain to me how this glacier is retreating if its ass end is still in the sea?????

Is it retreating from the MIDDLE????????

I think this is a case of my refrigerator ice bin.. Sometimes it's fuller than others.. But it's always producing enough..
Wouldn't be that this glacier is PRODUCING more ice and the bin is full --- would it??

Define "retreating" if the calving end is not physically on the ground..
 
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Time to do what denialists hate most, which is ignore their hysterical deflections and just talk about the issue. Here's the paper being discussed.

http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate2094.html#affil-auth
---

Retreat of Pine Island Glacier controlled by marine ice-sheet instability

Over the past 40 years Pine Island Glacier in West Antarctica has thinned at an accelerating rate, so that at present it is the largest single contributor to sea-level rise in Antarctica. In recent years, the grounding line, which separates the grounded ice sheet from the floating ice shelf, has retreated by tens of kilometres. At present, the grounding line is crossing a retrograde bedrock slope that lies well below sea level, raising the possibility that the glacier is susceptible to the marine ice-sheet instability mechanism. Here, using three state-of-the-art ice-flow models, we show that Pine Island Glacier&#8217;s grounding line is probably engaged in an unstable 40&#8201;km retreat. The associated mass loss increases substantially over the course of our simulations from the average value of 20&#8201;Gt/yr observed for the 1992&#8211;2011 period, up to and above 100&#8201;Gt/yr, equivalent to 3.5&#8211;10&#8201;mm eustatic sea-level rise over the following 20 years. Mass loss remains elevated from then on, ranging from 60 to 120&#8201;Gt/yr.
 
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