Polar Push & Bounce Back -Trends at the Extremes NEW ZT

**NEW ZETATALK**

This blog is about the Arctic,Antarctica and Extreme Northern/Southern Hemispheres.  Are New Trends happening at the Poles? Weather Patterns, Charts, Images and Unusual Anomalies may be telling us something!

According to the Zetas,  the Wobble Effect has now combined with a new Polar Push!!  

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http://poleshift.ning.com/forum/topics/zetatalk-chat-for-november-2...

Both poles the sea ice loss is off the charts this month!  Seems something has changed?
[and from another] Is it related to the warming of the oceans from the bottom and the wobble? Where will this lead?[and from another]
https://www.wunderground.com/blog/JeffMasters/crazy-cryosphere-reco...
Sea ice extent and area have both plummeted to record lows for this time of year in both the Arctic and Antarctic. Such dramatic losses rarely occur at the same time, which means that the global total of sea ice coverage is phenomenally low for this time of year. The weirdness extends to midlatitudes: North America as well as the Arctic have been bathed in unusual mildness over the last several weeks, while Eurasia deals with a vast zone of above-average snowfall and below-average temperatures. [and from another]
https://www.theguardian.com/environment/2016/nov/22/extraordinarily...



SOZT
It is clear from the charts that the Earth wobble has increased. First, despite Siberia being on the same latitude with Eastern Canada and Europe, there are vast temperature differences. The globe around the Arctic seems to be divided in half in this way at the current time. Just months ago, in July,
http://www.zetatalk.com/ning/23jy2016.htm
we stated that the hot and cold regions in the Northern Hemisphere were divided into four parts, due to the Polar Push and Bounce Back, and the lean to the Left and Right. Now the increased wobble has created a duality, not the quadrant arrangement of the Figure 8 that had been present since 2004.  

The Polar Push wherein the N Pole of Earth is shoved away from the approaching N Pole of Nibiru continues to create cold temperatures in Siberia, where the magnetic N Pole of Earth currently resides. This has also warmed Antarctica, which is getting more sunlight.  The Bounce Back is more fierce, so that Europe and eastern N America are also getting more sunlight, and thus the melting Arctic. What is missing is the temperature anomalies due to the tilt to the Left and Right. They have been lost in the more aggressive back and forth motion of the Polar Push and Bounce Back.  
EOZT

Prior ZT: http://www.zetatalk.com/ning/23jy2016.htm
The weather maps continue to document the daily Earth wobble, showing abnormal heat over the N American southwest and up into Alaska, and abnormal heat through Europe. Both these regions come under more equatorial sun due to the wobble, due to the lean to the left and then to the right. This is distinctly balanced by cold spots in between. Canada’s eastern provinces and the region above Hudson Bay receive less sunlight due this tilt to one side and then the other. Russia’s Far East and the Siberian region above China of course are pushed into the cold by the daily Polar Push, when the N Pole of Nibiru shoves the Earth magnetic N Pole away.

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The Polar Push Effect:

http://zetatalk.com/index/zeta103.htm

 

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Ecliptic Rise

http://www.zetatalk.com/index/earthtil.htm

Planet X approaches from the south, and the Pole Shift occurs because the S. Pole is pulled north with the N. Pole of Planet X during the passage. This stress is already evident in that many have noted that the Sun is too far south, rising too far to the south, for the time of year. Possible explanations for this are that the S. Pole has been pulled toward Planet X, creating a different tilt, but the constellations seem to be in their proper place. An alternate explanation is that the Earth's plane of the Ecliptic has changed, rising up, putting the Northern Hemisphere into a different slant, and placing the S. Pole more in line with the N. Pole of Planet X, an alignment Magnets Prefer.    

Natives to the Arctic,  the Inuit years ago already noticed many changes:

Uqalurait: the Snow is Speaking
November 23, 2009
http://www.isuma.tv/hi/en/inuit-knowledge-and-climate-change/uqalur...

An Igloolik elder, describes that uqalurait are changing because the earth itself has "tilted" and has thrown off the consistent wind patterns of the past. The earth tilting on its axis is another re-occuring observation that we are hearing from Inuit, which they know because of how the sun, moon and stars have changed in the sky. Indeed, elders simultaneously know the complexities of the cosmos, land, wind and sky.

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Both Poles are affected!

https://www.wunderground.com/blog/JeffMasters/crazy-cryosphere-reco...

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The Zetas describe the Final Days of the Wobble:

http://www.zetatalk.com/index/zeta582.htm

During the last weeks, the Earth changes from being in an end-to-end alignment with Planet X to being in a side-by-side alignment. It is during the end-to-end alignment, when Planet X is pointing its N Pole directly at the Earth, that the lean to the left and 3 days of darkness occur. But as Planet X continues in its retrograde orbit, its N Pole is no longer coming from the right, but is located to the left of the Earth, and the Earth adjusts by slinging its N Pole to the right. Thus, during the 6 days of sunrise west, the Earth still has its N Pole tipped away from the Sun and the approaching Planet X, but rather than a lean to the left, it has a lean to the right.
 
It is at this point that the Earth switches from being in an end-to-end alignment to being in a side-by-side alignment with Planet X. When Planet X is just at the Ecliptic, it stands upright in alignment with the Sun. As it switches from pointing its N Pole at Earth the Earth follows suit.
ZetaTalk: September 12, 2009

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Some charts to follow and/or post in this blog are HERE:

Climate ReAnalyzer

http://cci-reanalyzer.org

Google has the biggest collection of charts to view/post here!

https://sites.google.com/site/arcticseaicegraphs/

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NEW ZETATALK SEPT 30, 2017 **

http://zetatalk.com/ning/30sp2017.htm

With a stronger Polar Push the bounce back would likewise be more extreme, and the bounce back occurs when the Sun is over the Atlantic.  As the wobble continued to get worse, the Figure 8 corrective lean to the right and left also got more extreme. This sets the stage for the current 2017 hurricane season.

(Modified Earth images are from Google Earth)

Sunlight on Earth reflection based on image in the Planet X Related Captures Blog

The Figure 8 of the wobble creates a churning in the Atlantic:

1.) First land on either side of the Atlantic is pushed under water during the Polar Push,

2.) Then the N American Continent is slung to the East

3.) Then to the West as the day dawns and

4.) Then the bounce back pulls this land back up to the North. 

The wobble, in short, is churning the North Atlantic in a circular motion. Where this fits with the Coriolis effect, where the winds and water curl up from the Equator in a circular motion, moving clockwise in the Northern Hemisphere, the lean to the left does a direct clash, pushing the storm back in a path toward the US coastline.

This is the current Wobble pattern, but the Wobble is subject to change:

5.) A lean into Opposition has occurred, the N Pole leaning toward the Sun. **NEW LEAN**

6.) And a temporary Lean to the Left could occur,

7.) as well as a temporary Day of Darkness for the Northern Hemisphere.

This is not a static situation. (this will occur more than once, in other words).

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Comment by Stanislav on December 23, 2016 at 7:37pm

Weather buoy near North Pole hits melting point

Temperature difference from normal as analyzed by GFS model on Dec. 22. (University of Maine Climate Reanalyzer)
(This story has been been updated.)

22 December, 2016. Santa may need water skis instead of a sleigh this year.

A weather buoy about 90 miles south of the North Pole registered a temperature at the melting point of 32 degrees (0 Celsius) early Thursday, as a giant storm east of Greenland drew abnormally warm air northward.

Weather models had predicted temperatures could get this warm and this buoy, part of the North Pole Environmental Observatory, provides validation.

[Pre-Christmas melt? North Pole forecast to warm 50 degrees above normal Thursday]

“It seems likely areas very close to or at the North Pole were at the freezing point” Thursday, said Zachary Labe, a doctoral student researching Arctic climate and weather at the University of California at Irvine.

Data from the buoy (No. 300234064010010, which can be downloaded here) show that air temperatures have risen more than 40 degrees in the past two days, when they hovered near minus-11 degrees (minus-24 Celsius) which, even then, was above average.

Temperature near 89N latitude Dec. 20-22. (Data from North Pole Environmental Observatory buoy 300234064010010)

The entire Arctic north of 80 degrees, roughly the size of the Lower 48 states, has witnessed a sharp temperature spike reaching levels 30-35 degrees (nearly 20 Celsius) above normal. In reviewing historical records back to 1958, one cannot find a more intense anomaly – except following a similar spike just five weeks ago.

Temperature compared to normal in Arctic north of 80N latitude. (Danish Meteorological Institute)

Consider the average temperature in this large region is about minus-20 degrees (minus-29 Celsius) at this time of year, but had shot up to 12 Thursday.

Labe said the huge flux of warmth into the region may have contributed to the loss of sea ice at a time when the region is usually gaining ice.

Near the Franz Joseph Islands east of Svalbard, satellite imagery shows a large mass of ice vanishing over the last day. “This is pretty dramatic,” he tweeted.

Data from the National Snow and Ice Data Center indicate the Arctic lost about 57,000 square miles of ice (148,000 square kilometers) in the past day, which is roughly the size of Illinois. Labe cautioned, however, the ice loss data are preliminary and require quality control.

In Longyearbyen, Norway, which is on the island of Svalbard in the Nordic Seas, the high reached 36 degrees Thursday, according to Weather Underground, beating the old daily record of 33 degrees.

Although it is common for large storms to transport large quantities of heat into the high Arctic, inducing large temperature swings, the intensity of warmth — more than 40 degrees above normal — has caught the attention of scientists.

This is the second time in the past five weeks such a steep rise in temperatures has occurred. In mid-November, temperatures averaged over the high Arctic were also about 30-35 degrees above normal.

Surgut, Russia is still stuck at -49°C or -56°F ... that's about 60°F below normal under a lobe of the Siberian polar vortex. Source: twitter.com

An analysis from Climate Central, a nonprofit science organization, found that a warm event of comparable intensity to what occurred in November “would have been extremely unlikely in a climate of a century ago” before heat-trapping gases in the atmosphere had grown to current levels.

“If nothing is done to slow climate change, by the time global warming reaches 2 degrees Celsius (3.6 Fahrenheit), events like this winter would become common at the North Pole, happening every few years,” Climate Central concluded.

A similar spike to the present also occurred last year, when a buoy near the North Pole also showed temperatures at the melting point. This sharp rise motivated a study in the journal Nature, which concluded that the loss of sea ice in the Arctic over time “is making it easier for weather systems to transport this heat polewards.”

While the Arctic witnesses freak temperature rises, the cold air normally positioned there has sloshed southward into Siberia.

Temperatures there have crashed to about 60 degrees below normal, with air temperatures flirting with minus-60. Source: washingtonpost.com

Comment by SongStar101 on December 14, 2016 at 11:10am

Arctic temperatures have hit levels last seen a ridiculously long time ago

http://www.independent.co.uk/environment/arctic-extreme-climate-cha...

The word glacial should be redefined to mean 'rapidly diminishing' rather than slow, researchers say, as the pace of change in the Arctic begins to outstrip their ability to understand what's happening

Parts of the Arctic were an average of 11 degrees Celsius warmer than they were in the late 20th century as the region experienced “extreme record temperature anomalies”, the US National Oceanic and Atmospheric Administration (NOAA) has said.

Scientists who produced the annual Arctic Report Card warned the situation was changing so quickly it was “outpacing our ability to understand and explain” what they were witnessing.

They even suggested the word glacial could no longer be used to mean a slow pace and should be redefined to refer to something that was “rapidly diminishing”.

The report found the average annual air temperature over land areas was the “highest in the observational record” at 3.5C above 1900. Sea ice levels also fell to the lowest since satellite records began in 1979.

“Arctic temperatures continue to increase at double the rate of the global temperature increase,” it added.

Amid the 3.5C increase on land, there were some particularly “extreme record warm temperature anomalies”.

“The warmest temperature anomalies were centred on Alaska, Svalbard in the Atlantic sector and the central Arctic,” the report said.

“In the Spitsbergen area, the three-month winter mean temperatures were 8 to 11C above the 1961-90 average.”

The levels of ice on both land and sea have been shrinking dramatically.

“For Arctic researchers, communicating the impacts of our discoveries has taken on an unprecedented urgency in the face of environmental change that – in many instances – is outpacing our ability to understand and explain the changes we are witnessing,” the report said.

“Accustomed to advancing our scientific disciplines at what is often called a ‘glacial’ pace, we recognise that glaciers are not so slow anymore.

“Before long, we may need to redefine ‘glacial’ to mean something that is rapidly diminishing or employ a different adjective.”

Sea ice grows and shrinks with the seasons hitting a low point in October or November. This year the sea ice minimum was the lowest since satellite records began in 1979.

Comment by SongStar101 on December 13, 2016 at 11:00pm

Hottest Arctic on record triggers massive ice melt

This file This NASA handout file photo taken March 25, 2016 shows a perspective of the northeast coastline of Greenland, one of the world's two great ice sheets (the other is Antarctica), captured by the Oceans Melting Greenland (OMG) field campaign team flying NASA's G-III aircraft at about 40,000 feet on March 26. The Arctic shattered heat records in the past year, as unusually warm air triggered massive melting of ice and snow and a late fall freeze, US government scientists said December 13, 2016. The grim assessment came in the Arctic Report Card 2016, a peer-reviewed report by 61 scientists around the globe that is issued by the National Oceanic and Atmospheric Administration. AFP / NASA Handout

AFP

Miami: The Arctic shattered heat records in the past year as unusually warm air triggered massive melting of ice and snow and a late fall freeze, US government scientists said Tuesday.

The grim assessment came in the Arctic Report Card 2016, a peer-reviewed document by 61 scientists around the globe issued by the US National Oceanic and Atmospheric Administration.

The NOAA report covers from October 2015 to September 2016, a period it said the Arctic's average annual air temperature over land was the highest on record.

"The report card this year clearly shows a stronger and more pronounced signal of persistent warming than any previous year in our observational record" going back to 1900, NOAA Arctic Research Program director Jeremy Mathis told the American Geophysical Union conference in San Francisco, where the report was released.

"Those warming effects in the Arctic have had a cascading effect through the environment."

The environment has steadily declined since scientists started doing the annual report card, now in its 11th year, co-author Donald Perovich said.

"When it started, you kind of had to listen closely because the Arctic was whispering change," said Perovich, who works at Dartmouth College's Thayer School of Engineering in New Hampshire.

"Now it is not whispering anymore. It is speaking change. It is shouting change."

- Warming twice as fast -

The Arctic region is continuing to warm up more than twice as fast as the rest of the planet, which is also expected to mark its hottest year in modern times.

Climate scientists say the reasons for the rising heat include the burning of fossil fuels that emit heat-trapping gases into the atmosphere, southerly winds that pushed hot air from the mid-latitudes northward, as well as the El Nino ocean warming trend, which ended mid-year.

The Arctic's annual air temperature over land was 6.3 degrees Fahrenheit (3.5 degrees Celsius) higher than in 1900, the report said.

The sea surface temperature in the peak summer month of August 2016 reached nine degrees Fahrenheit (five degrees Celsius) above the average for 1982-2010 in the Barents and Chukchi seas and off the east and west coasts of Greenland.

"Warm air and ocean temperatures in the fall led to a record-breaking delay in fall freeze-up," Perovich said, noting that the Arctic sea ice minimum from mid-October to late November was the lowest since the satellite record began in 1979.

It was also 28 percent less than the average for 1981-2010 in October.

Scientists added a section to the report about noteworthy records set in October and November 2016, even though that extended beyond the report's typical time span.

- On thin ice -

More of the ice that freezes in the Arctic winter is thin, made of only a single year's worth of freeze rather than thicker, more resistant ice built up over multiple years.

In 1985, almost half (45 percent) of Arctic sea ice was called "multi-year ice."

Now, just 22 percent of the Arctic is covered in multi-year ice. The rest is first-year ice.

In Greenland, the ice sheet continued to shrink and lose mass as it has every year since 2002, when satellite measurements began.

Melting also started early in Greenland last year, the second earliest in the 37-year record of observations, and close to the record set in 2012.

- Record-low snow -

The springtime snow cover in the North American Arctic hit a record low in May, when it fell below 1.5 million square miles (four million square kilometers) for the first time since satellite observations began in 1967.

This melting, combined with retreating sea ice, has allowed more sunlight to penetrate the ocean's upper layers, stimulating widespread algae blooms.

The Arctic's people and animals are also suffering from the climate changes.

Ocean acidification is adding new stress for ocean creatures that need calcium carbonate to build shells, affecting people in the region who rely on fish for food.

And small mammals known as shrews are increasingly becoming infected with parasites that were once known to infect shorebirds, suggesting a northerly shift of some species.

The Arctic could be free of summer ice by the 2040s, Perovich said, adding that the changing temperatures are already affecting people who live in the region.

Asked by reporters if the report was tailored to the current political environment in the United States -- with President-elect Donald Trump declaring climate change a Chinese hoax and preparing a cabinet that will include climate change deniers -- Mathis said no.

"This is the best possible science that we can do," he said. "It is beyond reproach."

Comment by Stanislav on December 8, 2016 at 9:51pm

A crack in Antarctica is forming an iceberg the size of Delaware

Larsen ice shelf gif

NASA Earth Observatory/Jesse Allen and Robert Simmon. A timelapse of Larsen B disintegrating, starting one year after it broke away.

7 December, 2016. An iceberg the size of Delaware is starting to break away from Antarctica. It began with a small crack, but has now grown 70 miles long and more than 300 feet wide. When it reaches the edges of the ice sheet, the state-sized chunk will drift away into the sea.
The crack is a third of a mile deep—reaching all the way to the sea below. It’s a relatively new rift in the ice sheet, called Larsen C, but is following in its icy brethren’s footsteps: Larsen A and B both broke away from the main Antarctic sheet in the last two decades in much the same way. All three began with clefts in the ice and eventually floated away to disintegrate. That dramatic a cleft is unusual—it’s more common for ice sheets to slowly break up along the edges and fall in smaller chunks. Only in the last half century has it become common for the Antarctic to form these

NASA has been monitoring the Larsen ice sheets since Larsen A broke off in 1995. Larsen B followed it in 2002, and Larsen C is expected to go the same way soon. Operation IceBridge has surveyed the polar ice caps annually for the past eight years as a way to track changes in the glaciers and ice sheets. The MIDAS Project, a U.K.-based research group, first reported the Larsen C rift in 2014 and has kept a watchful eye on it ever since.
NASA will keep monitoring the crack along with other Antarctic research groups, though this year’s fly-over mission is already done. One of the IceBridge mission scientists at the Goddard Space Flight Center called it “possibly the best Antarctic campaign IceBridge has ever had,” saying that they had exceptionally good weather and better scientific instruments than ever before. The mission covered more area in their six week survey any previous year.

The more than 2,400 square miles that is likely to break away from Larsen C will only be about 12 percent of the ice sheet’s total area. But once that part comes loose, the MIDAS Project predicts that the rest of the sheet could become unstable and completely disintegrate. The crack is growing steadily and shows no signs of stopping, though the break won’t happen immediately. It takes much longer for ice sheets to break up—unlike many human relationships, this one will last through the holiday season. Source: popsci.com

Comment by Stanislav on December 6, 2016 at 9:40am

Polar ice the size of India has melted into the sea, scientists say

5 December, 2016. As global temperatures continue to rise and break records, polar sea ice covering an area about the size of India has vanished, according to climate scientists. The trend of polar ice melt has been alarming researchers, with sea ice in the Arctic and Antarctica being measured at record lows for this time of year, Reuters reports.

“There are some really crazy things going on,” Mark Serreze, director of the U.S. National Snow and Ice Data Center (NSIDC) in Boulder, Colorado, told the news service.

Serreze said temperatures in regions of the Arctic, for instance, were 36 degrees Fahrenheit above average on some days last month.

Beyond that, the NSIDC satellite measurements show that on Dec. 4, the extent of polar sea ice was 1.48 million square miles below the 1981-2010 average. That amounts to about the size of India, or for another point of reference, two Alaskas.

The latest measurements appear to reverse a trend of expanding Antarctic sea ice, which some skeptics cited to contradict evidence of climate change.

A number of factors may be contributing, including warmer waters in the Pacific from this year’s El Nino weather event, the report said.

Scientists say man-made global warming also played a major role.

This of course has been viewed as a major global crisis for world leaders. With last year’s Paris climate agreement, nearly 200 governments agreed to curb carbon emissions with the goal of keeping the world’s temperature increase to no more than 2 degrees Celsius above the global average temperature before the Industrial

It remains unclear whether the U.S. commitment to that deal will be honored by President-elect Donald Trump, who has previously called climate change a “hoax” and stated he might want to pull out of the Paris agreement. Mr. Trump backtracked somewhat in November, telling the New York Times that he has an “open mind” when it comes to climate change.

Mr. Trump and Ivanka Trump held meetings with Al Gore Monday at Trump Tower to discuss the issue of climate change. Gore characterized his talk with the president-elect as “very productive” and “a sincere search for areas of common ground.”

Those meetings came as Antarctica’s sea ice measured 4.33 million square miles — its smallest for early December, effectively beating 1982’s record, NSIDC reports. Similarly, sea ice in the Arctic, though expanding for the winter, hit a record low of 3.96 million square miles this season, below 2006’s record.

All of this is “an extraordinary departure from the norm,” Anders Levermann, a professor at the Potsdam Institute for Climate Impact Research, told Reuters.

Scientists worry that these developments could have a domino effect. As sea ice melts, glaciers could collapse more quickly into their surrounding waters, potentially increasing the rate of sea level rise rapidly. Source: cbsnews.com

Comment by SongStar101 on November 30, 2016 at 10:39am

Antarctica Ice Shelf is Breaking from the Inside Out

https://www.scientificamerican.com/article/antarctica-ice-shelf-is-...

An ice sheet in West Antarctica is breaking from the inside out.

The significant new findings published yesterday in Geophysical Research Letters show that the ocean is melting the interior of the Pine Island Glacier, which is about the size of Texas. The crack seems to be accelerating, said Ian Howat, associate professor of earth sciences at Ohio State University and the study’s lead author. The findings are the first confirmation of something glaciologists have long suspected was happening, he said.

“It’s showing a new weakness in the ice shelf, and it’s showing the weakness may be extending far up the glacier,” he said. “That’s the alarming thing from our standpoint.”

Higher ocean temperatures are causing the ice to shrink at an accelerating rate, and it’s eroding the ice fringing the continent. That, in turn, opens the ice sheet to further contact with warmer ocean water and increases the amount of ice running into the ocean, the researchers found.

“More importantly, it gives us a mechanism for even faster retreat in the future. Before, we used to have a slow retreat at the edges of the ice shelf,” Howat said. "The ocean had to nibble away at it on the edges. This allows the ice shelf to break apart way further inland from the inside out."

This latest retreat is particularly noteworthy because it’s farther inland than anything scientists have previously observed, he said. It also shows that the region could be more vulnerable than previously thought.

If Antarctica were not covered in ice, it would be a series of islands. That means much of the ice in the region is already under constant pressure from the ocean, as its movements dislodge the ice that covers the area between the land masses. Cracking is more likely to occur in the valleys located on the ice sheet, where the ocean is in closer contact with the ice, researchers found.

The currents off Antarctica are warmer and carry saltier water that encourages melting. The sea temperature is about 5 degrees Celsius, which is far warmer than the average surface temperature of minus 20 C. That causes a twofold vulnerability for the ice, because some of it is located underwater and because it is exposed to the warm sea around it.

Similar rifts have already been observed in Greenland, as the Arctic warms and ocean water flows along the bedrock, causing the ice to melt. The Pine Island Glacier and a similar-sized neighboring glacier are unique because they block ice flows from reaching the sea. That’s enough to keep about 10 percent of the ice sheet from toppling into the warmer water.

‘Significant collapse’ possible

A separate study published last week in Nature suggests that the melting of the Pine Island Glacier started in the 1940s, likely as a result of El Niño activity. Scientists obtained sediment cores from beneath the glacier to show that a cavity started forming before the mid-1940s. Warmer seawater flowed into the space and caused the glacier to lift off the sea-floor ridge that held it in place.

The thinning of the glacier shows that it is responding to shifts in sea temperatures that occur elsewhere in the world, even in the Pacific, researchers found. Once the melting begins, it can continue for decades, they said.

Understanding what caused the changes to the Pine Island Glacier and how long they could continue is important, said David Vaughan, director of science at British Antarctic Survey and a co-author of the study published in Nature.

“Ice loss from this part of West Antarctica is already making a very significant contribution to global sea-level rise, and is actually one of the largest uncertainties in global sea-level predictions,” he said.

The melting in Antarctica has a direct result on coastal cities across the globe. Imagine Antarctica as a dam, holding back ice instead of water, Howat said. It holds about half of the world’s fresh water. The spillways at the top of the dam are now open, increasing in volume and draining the reservoir. That increase will be felt as the sea levels rise and cities are inundated by increased flooding.

Scientists used satellite imagery to observe how the rift, located 20 miles inland, formed in 2013. Within two years, the rift had broken through the ice and caused a 225-square-mile iceberg to break off the glacier in the summer of 2015.

Howat said the rift is further evidence that it’s not a matter of if, but when the larger West Antarctic Ice Sheet will melt. It adds “to the probability that we may see significant collapse of West Antarctica in our lifetimes,” he said.

 

Comment by SongStar101 on November 30, 2016 at 10:20am

Huge Cracks In the West Antarctic Ice Sheet May Signal Its Collapse

http://gizmodo.com/huge-cracks-in-the-west-antarctic-ice-sheet-may-...

Last year, a 225 square-mile chunk of West Antarctica’s Pine Island Glacier broke off and tumbled into the sea. Now, Earth scientists at Ohio State University have pinpointed the root cause of the iceberg calving event: a crack that started deep below ground and 20 miles inland.

It’s like nothing scientists have witnessed in West Antarctica before, and it doesn’t bode well for the ice sheet’s future.

A frozen fortress containing enough water to raise global sea levels many feet should it melt, the West Antarctic ice sheet is separated from the ocean by a series of large glaciers. For now, these glaciers act like corks in wine bottles to hold the ice at bay, but that may not be the case for much longer. Recent research has shown that Pine Island, Thwaites, and other glaciers along the Amundsen sea are retreating rapidly, as warm ocean waters lap against their margins. At this point, NASA says, collapse of the entire Amundsen sea sector appears to be “unstoppable.”

“This event gives us a new mechanism for ice sheets falling apart quickly. It fits into that picture of a rapid retreat.”

The biggest question on everyone’s mind is how quickly all of that ice will go, and to find out, we need to pinpoint the mechanisms responsible for ice sheet collapse. To that end, a study published today in Geophysical Research Letters takes a deep dive into an iceberg calving event in the summer of 2015. It arrives at a startling conclusion.

“The calving event itself wasn’t a big deal,” lead study author Ian Howat of Ohio State University told Gizmodo, noting that iceberg break-offs of this size happen about every 5 to 6 years at Pine Island. “What made this one different is how it got started.”

Not so with last year’s Pine Island calving event. Analyzing several years of images taken by the Sentinel-1A satellite, Howat and his colleagues traced the break-off to a rift that formed at the base of the ice shelf nearly 20 miles inland, in 2013. Over the course of two years, the rift propagated all the way from bottom to top, until finally, it spat out an iceberg ten times the size of Manhattan.

What could have caused so much ice to break away in this unusual manner? In all likelihood, melting that started at the contact point between ice and bedrock is to blame. This would explain why the rift overlapped with a topographic valley—a place where the ice appeared to have thinned—in satellite images taken before the calving.

“I think what we’re seeing is the surface expression of a much bigger valley at the base of the ice shelf,” Howat said. “This tells us the ice shelf has weaknesses that are being exploited by increased ocean temperatures.”

Troublingly, as waters around West Antarctica heat up, those weaknesses could be exploited more and more often. “If the ice sheet was going to retreat very slowly on long timescales, we’d just expect to see the usual calving,” Howat said. “This event gives us a new mechanism for ice sheets falling apart quickly. It fits into that picture of a rapid retreat.”

Comment by SongStar101 on November 29, 2016 at 9:23am

Odd how the recent speed of melting ice appears a bit different than the Wobble.  From the last years the Wobble has been increasingly ongoing,  and changes happening gradually.  This now is a DAY of change abruptly?

Did Föhn Winds Just Melt Two Miles of East Antarctic Surface Ice in One Day?

https://robertscribbler.com/2016/11/28/did-fohn-winds-just-melt-two...

It’s right there in the satellite image. A swatch of blue that seems to indicate an approximate 2-mile long melt lake formed over the surface of East Antarctica in just one day. If confirmed, this event would be both odd and concerning. A part of the rising signal that melt stresses for the largest mass of land ice on the planet are rapidly increasing.

(Possible large melt lake on the surface of an ice shelf along the Scott Coast appears in this NASA satellite image. The melt lake seems to have formed after just one day during which föhn winds ran downslope from the Transantarctic Mountain Range — providing a potential period of rapid heating of the glacier surface.)

Surface Melt Now Showing Up in East Antarctica

While scientists and environmentalists are understandably concerned... — resulting in risks for rapid sea level rise for the near future, another consequence of global warming is also starting have a more visible impact on the frozen and now thawing continent. Surface melt, which was hitherto unheard of for most of East Antarctica, is now starting to pop up with increasing frequency.

East Antarctica, according to Stewart Jamieson, a glaciologist at Durham University ..., is “the part of the continent where people have for quite a long time assumed that it’s relatively stable, there’s not a huge amount of change, it’s very, very cold, and so, it’s only very recently that the first supraglacial lakes, on top of the ice, were identified.”

But now, even in austral springtime, we find evidence of surface melt in the satellite record.

On November 27, 2016, what looks like an approximate 2 mile long melt pond appeared in a section of ice shelf along the Scott Coast and just North of the Drygalski Ice Tongue in the region of McMurdo Sound. The lake — which is visible as a light blue swatch at center mass in the NASA-MODIS satellite image above — suddenly showed up in November 27 satellite image along a region where only white ice was visible before. And it appears in a region of East Antarctica that, before human-forced warming altered the typically-stable Antarctic climate, had rarely, if ever, seen surface melt.

(Near melting point temperatures appear along the Scott Coast in conjunction with an apparent föhn wind event. Image source: Earth Nullschool.)

The pond shows up coordinate with recorded near 0 C surface temperatures in the GFS monitor for November 26-27 and along with evidence of downsloping (föhn) winds. GFS indicators show downsloping winds gusting to in excess of 50 mph over the period. Such winds have the potential in increase surface temperatures by a.... And they have, increasingly, produced surface glacial melt events in regions of Greenland and Antarctica during recent years.

Surface Melt as a Feature of Glacial Destabilization

Supraglacial lake is just another word for a surface glacial melt lake. And these new lakes pose a big issue for ice sheet stability. Surface melt lakes are darker than white glacier surfaces. They act as lenses that focus sunlight. And the comparatively warm waters of these lakes can flood into the glacier itself — increasing the overall heat energy of the ice mass.

(A NASA researcher investigates a surface melt pond in Greenland. During recent years, these climate change related features have become more common in Antarctica. Image source: NASA.)

But water at the glacier surface doesn’t just sit there. It often bores down into the ice sheet — producing impacts for months and years after the surface lake’s formation. Sub surface lakes can form in the shadow of surface ponds. Transferring heat into the glacier year after year. In other cases, water from these lakes punches all the way to the glacier’s base. There the added lubrication of water speeds the glacier’s flow. All of these processes generate stresses and make glaciers less stable. And it is the presence of surface melt ponds that has been responsi....

Now, a similar process is impacting the largest concentration of land ice on the planet. And while Greenland holds enough ice to raise sea levels by around 21 feet, East Antarctica contains enough to lift the world’s oceans by about 195 feet. Surface melt there, as a result, produces considerably more risk to the coastal cities of the world.

Links:

NASA-MODIS (#ThankYouNASA)

These Stunning Blue Lakes Give us New Reason to Worry About Antarctica

Earth Nullschool

New Maps Chart Greenland Glaciers’ Melting Risk

Comment by SongStar101 on November 25, 2016 at 12:20pm

Note the Push & Bounce being very intense in the last weeks!   http://zetatalk.com/menukons.htm

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