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Full Version: Antarctic Supervolcano Is Melting The Ice-Caps From Within
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Another take on global warming and melting icecaps

"This Is Crazy" - Antarctic Supervolcano Is Melting The Ice-Caps From Within
"As we’ve pointed out, the supervolcano phenomenon is hardly unique to Yellowstone National Park, where a long dormant volcano with the potential to cause a devastating eruption has been rumbling since mid-summer, making some scientists uneasy.

Surprisingly active supervolcanos have been documented in Italy, North Korea and, now, Antarctica after scientists at NASA’s Jet Propulsion Laboratory (JPL) have found new evidence to support a theory that the breakup of Antarctic ice may be caused in part by a massive geothermal heat source, with output close to the scale of Yellowstone National Park.

Of course, if accurate, this theory would help rebut the notion that man-made climate change is in part responsible for the melting ice, Russia Today reports.

[Image: 2017.11.09antarcticatwo.JPG]

A geothermal heat source called a mantle plume, a hot stream of subterranean molten rock that rises through the Earth's crust, may explain the breathing effect visible on Antarctica's Marie Byrd Land and elsewhere along the massive ice sheet.

While the mantle plume is not a new discovery, the recent research indicates it may explain why the ice sheet collapsed in a previous era of rapid climate change 11,000 years ago, and why the sheet is breaking up so quickly now.

"I thought it was crazy. I didn't see how we could have that amount of heat and still have ice on top of it," said Hélène Seroussi of NASA's Jet Propulsion Laboratory in Pasadena, California.
Seroussi and Erik Ivins of JPL used the Ice Sheet System Model (ISSM), a mathematical depiction of the physics of ice sheets developed by scientists at JPL and the University of California, Irvine. Seroussi then tweaked the ISSM to hunt for natural heat sources as well as meltwater deposits.

[Image: 2017.11.09antarctica.JPG]

This warm water lubricates the ice sheet from below, allowing glaciers to slide off into the sea. Studying meltwater in western Antarctica may allow scientists to estimate how much ice will be lost in future.

During their initial work, Seroussi and Ivins created simulations using higher heat flows than 150 milliwatts per square meter, which did not align with their space-based readings, except for one area: The Ross Sea.

https://twitter.com/RT_com/status/917907...aps-within

Their calculations showed that, in certain sections of the sea, a heat flow of at least 150-180 milliwatts was required to create sufficient meltwater flows that matched with observations. They now believe the mantle plume is responsible for these higher-than-average readings.

The Marie Byrd Land mantle plume formed 50 to 110 million years ago, predating the Western Antarctic ice sheet. The mantle plume theory was initially proposed 30 years ago, but it’s not the only theory. Another posits that the sheer weight of the ice sheets causes melting deep below the surface."

Source:http://www.zerohedge.com/news/2017-11-09/crazy-antarctic-supervolcano-melting-ice-caps-within
The supervolcano aspect is new to me, but I'd previously noticed that the ice sheets were melting over known volcanoes.
(11-11-2017 05:03 AM)Count Iblis Wrote: [ -> ]The supervolcano aspect is new to me, but I'd previously noticed that the ice sheets were melting over known volcanoes.


Didn’t know. But when you think about it, iT makes sense. The climate is a hyperbole, in the 1800’s we had a little iceage with long and strong winters and freezing temperatures. Heck, my grandfather told me how he drove his car on the river to the other side. That’s really hard to imagine these days as i live in the same region. Still it’s about a 80 years ago.. and now we are glad when we have 5 days of frost so we can iceskate. And even that is becoming a unicum


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There has been global warming but blaming it on humans is pure politics. I was suspicious pretty early on. When I was young the Warmists were saying that AGW was going to cause the ice caps to shrink in area (melting from higher ocean temps) but also thicken (from the increased precipitation that AGW was supposed to bring). However the ice caps were both shrinking and getting thinner. So almost immediately I knew something wasn't quite right. Later the thinning was just ignored by the Warmists. Then it was discovered that they were shrinking faster than the theory predicted. By that time I became aware of the existence of underwater volcanoes so it was a trivial exercise to look at where the active volcanoes were and where the melting was. A few years ago the Arctic ice started expanding in area which has baffled scientists. Instead of the Arctic ice shrinking and getting thicker it's growing and getting thinner. Of course the ice caps are not the only thing the theory gets wrong. It seems to get everything wrong except for the general idea of warming (and even here the models predict higher than observed warming) and perhaps an increase in precipitation.
Quote:Of course, if accurate, this theory would help rebut the notion that man-made climate change is in part responsible for the melting ice, Russia Today reports.

key point
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