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    Antarctic Ice Sheet - It's Never Been Very Stable
    By News Staff | May 28th 2014 03:34 PM | 4 comments | Print | E-mail | Track Comments

    Evidence for massive and abrupt iceberg calving in Antarctica dating back 19,000 to 9,000 years ago is based on an analysis of new, long deep sea sediment cores extracted from the region between the Falkland Islands and the Antarctic Peninsula. 

    The study in Nature documents that the Antarctic ice sheet is unstable and can abruptly reorganize Southern Hemisphere climate and cause rapid global sea level rise. 


    What brought   about such huge ice-sheet collapses in Antarctica back then, since there was no Anthropocene to implicate?  For that, the researchers had to fall back on climate modeling experiments. 
     


    The first evidence for massive and abrupt iceberg calving in Antarctica, dating back 19,000 to 9,000 years ago, has now been documented by an international team of geologists and climate scientists. Credit: Frank Roedel, Alfred Wegener Institute


    "One of the iceberg events in our data that is of particular interest took place 14,600 years ago and coincided with a huge ice-sheet melt, the famous Meltwater Pulse 1A, which according to previous studies led to a global sea level rise of about 4 meters within 100 years," says lead author of the study, Michael Weber at the University of Cologne in Germany.

    "This is the first direct evidence that instabilities of the Antarctic ice sheet caused rapid sea level rise during the last glacial termination," says co-author Peter Clark, professor at Oregon State University.

    "An unusually strong flow of warm water towards Antarctica may have triggered these events. Our model experiments reveal further that the associated melting in turn increased the warm water flow, thus providing a positive feedback. This is a perfect recipe for rapid sea level rise," explains co-author Axel Timmermann, professor at the International Pacific Research Center of the University of Hawaii.

    The new findings document that the Antarctic ice-sheet underwent rapid changes in an otherwise gradual transition from glacial to interglacial times in the Southern Hemisphere.

    "Our paleo data of abrupt ice-sheet instabilities provide an important benchmark against which future projections of human-induced changes in Antarctic ice volume and global sea level can be evaluated," says Gerrit Lohmann, professor at the Alfred Wegener Institute, Bremerhaven, Germany.



    Comments

    97% of scientists agree: it's pretty amazing that pollution in the 20th century was able to cause massive and abrupt iceberg calving 19,000 years ago. But hey! The models prove it!

    "An unusually strong flow of warm water towards Antarctica may have triggered these events. Our model experiments reveal further that the associated melting in turn increased the warm water flow, thus providing a positive feedback. This is a perfect recipe for rapid sea level rise."

    What caused these waters to warm so rapidly 15,000 years ago? It wasn't CO2, which was both stable and low (around 240 - 250 ppm) during that time. There had to be some other mechanism heating the oceans back then. So what was it? And why would we think that those naturally occurring mechanisms that heat oceans no longer exist today?

    According to the IPCC, sea levels rose at a rate of 6.7 inches per century during the period 1901 to 2010. That rate of sea level rise, which is comparable to the rate of rise from 1790 to 1900, occurred during the same period of time that 100 ppm of additional CO2 was pumped into the atmosphere. A 2008 peer reviewed study, using over 1,000 gauge records, indicated that the fastest rate of sea level rise acceleration occurred during the 1920 to 1950 period, or when CO2 levels were still in the low 300s ppm range and well below today's levels. Since 1950, sea level rise has actually decelerated compared to the 1920-1950 period---even though nearly 100 ppm of anthropogenic CO2 has been added since 1950 (we're now around 400 ppm). The same study indicated that sea level rise input from glacier melt occurred at a rate 60% higher from the years 1910 to 1950 as it did from 1950 to 2000. Simply put, there is no correlation between anthropogenic CO2 and sea level rise acceleration. Other factors (ENSO events, solar variations) play a much more influential role in ocean heating and thus glacier melt and thermal expansion than anthropogenic CO2 does. So the idea that we can affect glacier melt and sea level rise acceleration to any discernible degree with our CO2 emissions practices is an exercise in anthropocentrism.

    Note to UN -- suppress this research, it does not conform with the "97%".

    Note to climate scientists -- there are a lot of reasons for massive ice melts, and not all of them have a climate root cause. Polar shift, EMF instability, volcanic activity, the list goes on.

    Take off the blinders and think outside the box or stay in your self-declared consensus. The choice is yours.

    Hint: instead of a four-meter rise in 100 years (how do they figure out the 100 year part?) consider four meters in 100 hours or 100 days or 100 months. Yes, catastrophic and world-changing, as described in Gilgamesh and the Bible, among other places.

    Now consider every large land mammal in North and South America went extinct around the same time. Paleontologists and archaeologists want you to believe newly arrived humans hunted them to extinction at a rate unheard of anywhere else in history. Across two enormous continents. From sea level to mountaintop, rain forest to high desert.

    Balderdash, they drowned and/or starved as a result of a cataclysm.

    Ask yourself: Why does every potato in the world originate from plants at 10,000 feet elevation? Is it a coincidence the ancient South Americans built on mountaintops rather than in valleys?

    It's so obvious it makes me want to smack these "scientists" on the forehead and say, "What's wrong with you, retard?"