Yahoo – AFP,
Marlowe Hood, December 12, 2016
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The main vulnerability of ice shelves to climate change remains warming ocean water that erodes their underbelly (AFP Photo/RYAN DOLAN) |
Paris (AFP)
- East Antarctica’s massive ice sheet may be more exposed to global warming
than long assumed, according to a study Monday that shows how strong winds can
erode ice shelves that help hold it in place.
There is
enough frozen water sitting on top of the world's polar continent to raise sea
level by dozens of metres and redraw the world map if it melts.
But
understanding the dynamics of the region -- which includes the much smaller
West Antarctica ice sheet -- has proven difficult.
Up to now,
scientists have focused on the threat of West Antarctica.
Recent
studies have suggested that climate change may already have condemned large
chunks of its ice sheet to disintegration, whether on a time scale of centuries
or millennia.
In
contrast, ice covering East Antarctica was seen as far more stable, even
gaining mass.
The
floating, cliff-like ice shelves straddling land and ocean that prevent inland
ice from slipping into the sea, it was thought, were solidly anchored.
That
remains largely true. But a mysterious crater on the King Baudoin ice shelf,
due south from the tip of Africa, prompted a team of researchers from the
Netherlands, Belgium and Germany to challenge that assumption.
"Our
research has shown that East Antarctica is also vulnerable to climate
change," said Jan Lenaerts, lead author of the study and a researcher at
Utrecht University in the Netherlands.
The
findings were published in the journal Nature Climate Change.
Some
reports had attributed the crater to a meteorite impact, but when Lenaerts and
his team arrived in January they realised the water-filled cavity had other
origins.
Combining
climate models, satellite data and on-site measurements, they concluded that
strong winds carrying warm air were blowing away reflective snow, allowing the
Sun's rays to be absorbed into the darker ice rather than bounced back into
space.
Dress
rehearsal
The main
vulnerability of ice shelves to climate change remains warming ocean water that
erodes their underbelly.
Normally,
that erosion is compensated by the accumulation of fresh snow and ice from
above.
But oceans
in recent decades have absorbed much of the excess heat generated by global
warming, which has lifted average global air temperatures by one degree Celsius
(1.8 degrees Fahrenheit).
When
combined with erosion from above, the impact on ice sheet stability may be
larger than previously understood.
"These
processes -- previously unseen in East Antarctica -- indicate that further
warming may amplify the risk of ice shelf collapse," said Martin Siegert
of Imperial College London, commenting on the study.
A dress
rehearsal of what might happen more broadly occurred in 2002, when West
Antarctica's Larsen B ice shelf underwent a "rapid and catastrophic
mechanical failure," falling into the sea, he noted.
There, too,
meltwater had collected on the surface in hundreds of lakes, and when they
quickly drained the buoyancy caused the shelf to rupture.
"Larsen
B tells us that surface melting can be critical to the structural integrity of
ice shelves," Siegert wrote in a commentary, also in Nature Climate
Change.
Related Articles:
“… Now, in the process of all of this, there's going to be renewed interest in Antarctica, and you're going to find some interesting things about the land under the ice. The topography of the land under the ice does not match the topography of the ice above. Some astonishing shapes will be revealed when you map the actual land under the ice. Points of mountains are going to be revealed, giving an entire different idea of what Antarctica might have been and what its purpose really is. The continent that is uninhabitable by Human Beings may very well be the engine of life for Human Beings. And I will leave it at that. …”
"Effect of the New Energy on DNA" + "One Foot in Each Energy" (3) - Aug 1-2, 2015 (Kryon Channelling by Lee Carroll) - (Text version)
(Subjects: Religion, Shift of Human Consciousness, 2012, Intelligent/Benevolent Design, EU, South America, 5 Currencies, Water Cycle (Heat up, Mini Ice Ace, Oceans, Fish, Earthquakes ..), Middle East, Internet, Israel, Dictators, Palestine, US, Japan (Quake/Tsunami Disasters , People, Society ...), Nuclear Power Revealed, Hydro Power, Geothermal Power, Moon, Financial Institutes (Recession, Realign integrity values ..) , China, North Korea, Global Unity,..... etc.) - (Text version)
“… The Weather
Let's talk about the weather. We retreat to exactly what we told you before in this very chair. The water cycle is a cooling cycle, not a heating cycle. You're going to have more severe winters and storms. It's going to get colder. But it gets warmer before it gets colder. That is the cycle, and it has always been the cycle. You can see it in the rings of the trees and the cores of the ice. Don't let your scientists pull the political wool over your eyes for their own purposes. Start seeing these things for what they are. It's a recurring cycle based on four Earth alignment attributes, including the wobble (the precession). You're in this cycle. Prepare.
The beginnings of it will be with you from now at least until the end of the 2012 36-year window, and you can watch it work. The first thing that happens is that the ice melts at the poles, but not completely. It's the way it has happened before. As the redistribution of weight from the poles to the oceans of the earth takes place, the weight is redistributed to the crust, and that creates earthquakes. And the earthquakes that will be the most powerful are the ones that are closest to the poles. We told you that some time ago. So it's not a mystery that suddenly you have some of the most powerful earthquakes that you've ever had. Not only that, but a cooling ocean creates larger storms.
What do the conspiracists do with all this? "See? We're doomed. Here it comes," they say. "Here it comes! The end is here!" Twenty-two years ago, we gave you the information that is happening today. We told you about the weather. We told you to get ready for it, but we still haven't told you why the water cycle is needed. We've hinted at it since it is very controversial, and we'll lose many readers right here and now. Here's the prediction: The scientists are going to laugh and biologists are going to scratch their heads and roll their eyes.
The Refreshing of the Cycle of Life
When you change the temperature of the waters of the planet, it changes the life cycle of the ocean and it eventually renews itself. The life cycle of the planet has a limit to its viability over time. There has to be a refreshing of the very cycle of life, and this is what the water cycle does. Are there any places you've seen too many fish lately? Yes. Millions of salmon in the north. Odd that it was in Alaska, isn't it? Alaska is very close to the poles where the water temperature is being felt first. Oh, again the experts will tell you that this is not the reason. It's about hatcheries and rivers. But nobody predicted this, did they? Science is fast to give you reasons, but slow to give you logic in advance. They always seem to be surprised.
We are saying things we haven't said before. Again, watch for this, an actual change in the life cycle of the planet's oceans because of the water temperature shift. Biologists are going to have to start redesigning the paradigm of how everything works, including reefs, ocean bottoms, and how plankton survive and reproduce. Listen, this is not the first time that the life cycle has been refreshed! But again, this may take generations of humanity to complete. In the process, you may again lose species. This is normal. Gaia is slow, and Humans are impatient. Your textbooks may someday tell of how naive humanity was back in 2011 when they tried to blame weather changes on everything but a natural cycle. Now you know why there is a water cycle.
So what does that tell you about Gaia? Gaia is beginning the cycle of refreshing life on over-fished oceans. It tells you that in the cracks, there is love and caring about the Humans who live on the earth. There's a reason you're here. There's a plan here, and a benevolent Universe and quantum energy with intelligent design. All is there for you, precious, sacred Human Being. …”
We are saying things we haven't said before. Again, watch for this, an actual change in the life cycle of the planet's oceans because of the water temperature shift. Biologists are going to have to start redesigning the paradigm of how everything works, including reefs, ocean bottoms, and how plankton survive and reproduce. Listen, this is not the first time that the life cycle has been refreshed! But again, this may take generations of humanity to complete. In the process, you may again lose species. This is normal. Gaia is slow, and Humans are impatient. Your textbooks may someday tell of how naive humanity was back in 2011 when they tried to blame weather changes on everything but a natural cycle. Now you know why there is a water cycle.
So what does that tell you about Gaia? Gaia is beginning the cycle of refreshing life on over-fished oceans. It tells you that in the cracks, there is love and caring about the Humans who live on the earth. There's a reason you're here. There's a plan here, and a benevolent Universe and quantum energy with intelligent design. All is there for you, precious, sacred Human Being. …”
"Effect of the New Energy on DNA" + "One Foot in Each Energy" (3) - Aug 1-2, 2015 (Kryon Channelling by Lee Carroll) - (Text version)
"... The Role of the Sun
As you move into this new energy, or what some have even called "radiation", you should know how it works, for it's very related to your Sun. Physically, it affects the magnetic field of the Sun (the heliosphere), which then in turn is blasted to your own magnetic field via the solar wind. That's the physics of it, but dear one, let me give you the esoterics of it. This has been the plan all along, that if you made it as a Human race past the 2012 marker, you would pass into this area of space and the magnetics would shift, allowing Human consciousness to change. Dear ones, this was always here waiting for you to pass the marker! This is why I came 26 years ago and told you the magnetics would shift. This is an evolutionary energy that is going to affect your Sun - the heliosphere of your Sun - which then will pass to the magnetic field of the earth, a field that has now been repostured for this new consciousness.
Oh, there are those intellectuals who would say, "Well, what if we had destroyed ourselves as the prophecies said we would? What if there were no Humans to receive this?" It's simple. No Humans would have been here, but the planet would have still moved into this new area of space and the same energies would have been there, but you would not have been. Simple. But indeed, here you are!
So now you can see that the prophecy from the indigenous is also being fulfilled, for they told you about the changes coming after the precession of the equinoxes (December 2012). How could they have had this prophecy about your movement into a new place around your galaxy? Think about it! These things are not new, and even the ancients told you it was coming! They may not have known the specifics of science, but their prophecy is the same one I have: New consciousness is coming.
Dear ones, I want you to continue to put together these pieces physically in what you can see. As we told you, these changes affect your Sun. The heliosphere of your Sun changes you magnetic grid. Now, for this all to work, the Sun had to be quiet for this. I want you to ask an astronomer about the Sun and the cycles of the Sun. Ask about what period of radiance the Sun is in at the moment. The astronomer will tell you that it appears to be one of the quietest cycles that the Sun has ever seen. Solar flares and sunspots are disturbances in the multidimensional field that surrounds the Sun, so these had to be gone while the new energies were starting to be implemented. For this all to work, the Sun had to be as quiet as possible, and it is. The Sun's quiet time is also affecting your weather, and we told you that, too. Due to its quietness, you're in a cycle of weather that we also predicted [a cold time coming] that also has a lot to do with the energy that's coming. That's physical. Ask an astronomer, “Are they worried about all this?” Some of them are and others are not. But it is affecting you and the planet right now. Now you know why the magnetic grid was changed when it was changed and why. That's physical. .."
New Mini Ice Age
"The weather you have today, and all the alarming attributes of it, is a scenario of what was scheduled to happen on Earth anyway. I review again that the weather changes you are seeing prophesied by myself, 21 years ago, are not a surprise. The changes are not caused by the pollutants you put in the air. You call it global warming and that's a nice phrase, and perhaps that will get you to put less pollutants in the air – a very good thing. But what you are seeing in the weather shift today was not caused by Humans putting things into the air. It would have happened anyway in about 300 years."
"We've called this process the water cycle, since it's all about water, not about air. The water is the predominant attribute of Gaia and of the weather cycle you're seeing. More predominant is the temperature of it. The cycle is ice to water and water to ice, and has been repeated on this planet over and over and over. It is not new. It is not exceptional. It is not frightening. But it's a cycle that modern humanity has not seen before, and it's a long cycle that is beyond the life span of a Human Being. Therefore, it tends to be overlooked or not seen at all !"
"In the days of the Lemurians, the water level of the Pacific Ocean was almost 400 feet lower, and that's only 50,000 years ago. [Kryon invites science to check this out – the water level at that time.] That was a water cycle working, and the reason it was lower was due to so much of the water being stored as ice. Today you're going through another water cycle that will eventually lead to cooling. The last one was in the 1400s."
"Science sees that at about 1650. As mentioned, they are so slow there is no remembrance that a Human has of them except in past writings and in the rings of the trees. The time span of the changes is so great that environmental record keeping does not exist in the form that it does today. But you can still look at the rings of the trees and at the striations of the rocks and can generally figure out that a few hundred years ago, you had a mini-ice age. Now you're going to have another one."
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