Anyone who has seen The Day After Tomorrow will be familiar with the concept of "tipping points" where slow and gradual changes in atmospheric CO2 levels can reach a point that triggers a sudden change in temperatures. While a lot of the aforementioned movie remains firmly in the realm of science fiction, a new study has found evidence of such tipping points occurring in the past, resulting in dramatic climate changes over a short period.
Ice core samples in Greenland have shown that during the last glacial period, temperatures periodically shot up by as much as 10° C (18° F) in a matter of decades, but it wasn't clear why that was the case. A study by researchers at the Alfred Wegener Institute and the University of Cardiff has shed some more light on this phenomena, known as Dansgaard-Oeschger events, using a computer model that simulates the relationship between the atmosphere, ocean currents and sea ice levels.
The team found that a high concentration of CO2 in the atmosphere was the likely suspect for these sudden warming events. The CO2 levels didn't have to rise quickly either: after a period of slow but constant growth, the climate can reach a crucial tipping point, setting off a chain reaction that results in temperature spikes.
As CO2 levels increase, the eastern part of the Pacific Ocean warms up faster than the western region of the Atlantic does, resulting in stronger trade winds across Central America. That means more moisture is carried out of the Atlantic, leaving the surface water saltier and denser, and speeding up the "conveyor belt" motion of the Atlantic Ocean. This strong current carries warmer waters north, and as a result leads to increased temperatures. Inversely, the slowing down of this current at other times has been linked to the beginning of ice ages.
"With this study, we've managed to show for the first time how gradual increases of CO2 triggered rapid warming," says Xu Zhang, first author of the study. "Our simulations indicate that even small changes in the CO2 concentration suffice to change the circulation pattern, which can end in sudden temperature increases."
While the findings fit the records in the past, the researchers don't want to declare that the same thing could happen in the future, because the Earth is a very different place nowadays.
"We can't say for certain whether rising CO2 levels will produce similar effects in the future, because the framework conditions today differ from those in a glacial period," says Gerrit Lohmann, co-author of the study. "That being said, we've now confirmed that there have definitely been abrupt climate changes in the Earth's past that were the result of continually rising CO2 concentrations."
The research was published in the journal Nature Geoscience.
Source: Alfred Wegener Institute
Earthquakes, Volcanic eruptions and Pole Shift Historically, this planet has seen surges of earthquake, volcanic activity and general increases and decreases in temperature, but these changes have happened over many tens of thousands of years. Some changes have almost certainly happened suddenly as a result of asteroid strike and pole shift (see the current and predicted accelerating movement of the position of the North Pole at )http://www.ngdc.noaa.gov/geomag/data/poles/NP.xy and have been accelerated by the affects of excessive plate movements causing extensive earthquakes http://earthquake.usgs.gov/earthquakes/map/ (then click the cog top right hand corner, select Magnitude 2.5 + worldwide to see how many earthquakes have occurred in the past month then hit search earthquake archives and hit the – button on the map to see the worldwide locations(1439 at 17.00 GMT 06.02.16 up from a few hundred 13 years ago!) and volcanic eruptions http://www.volcanodiscovery.com/erupting_volcanoes.html activity now up to 60 from thirteen years ago. See also http://theeconomiccollapseblog.com/archives/40-volcanoes-are-erupting-right-now-and-34-of-them-are-along-the-ring-of-fireCurrently, as a result of the pole shift, earthquakes and volcanic eruptions (211 active volcanoes!) are on the increase and there are over 3,500,000 fissures in deep ocean releasing much more greenhouse gas than man produces and pole shift will increase this volume. Just factor in the 3.5 million fissures in deep ocean pumping out 'greenhouse gases' and turning the oceans rapidly acidic (google 'acidification of the oceans') and the gases being released from the increased number of active volcanoes. Hence the huge spike in CO2 recorded by the IPCC! (It is not us driving 100 times more for the past few years!) The crust is on the move and it is putting stress on the crust....go to you tube and search 'cracks in the earth crust'...some are miles long and appear instantaneously! One example see https://www.youtube.com/watch?v=mJEXQ8g24UU So prepare for more earthquakes, volcanic eruptions and more severe climate change in the future! Our next pole shift is well overdue....the last one caused mass extinctions worldwide. See also www.magneticreversal.org Florida sea level rise https://www.youtube.com/watch?v=JjZtdpD2XiE and https://www.youtube.com/watch?v=-JbzypWJk64 & https://www.youtube.com/watch?v=Zqfuie-fCzE where sea level rise is not to do with global sea rise but to do with pole shift as North America moves south towards the bulge of ocean at the Equator. Areas approaching the Equator are sinking, areas moving away from the Equator are rising.
In previous pole shifts, there is now strong evidence to show that leading up to such events, oxygen levels decrease as more 'poisonous and inflammable greenhouse gas' is released from the increased number of volcanic eruptions, deep ocean fissures and earthquakes. In addition, following massive volcanic eruptions, without sun to allow plants to grow converting carbon dioxide to oxygen, carbon dioxide levels increase and oxygen levels fall exponentially. See http://earth-pages.co.uk/2014/04/17/oxygen-magnetic-reversals-and-mass-extinctions/ Wild weather is on the increase monthly. Please see https://www.youtube.com/watch?v=0kz9rGhhPdc SOTT Earth changes July 2016.Then look at the many You Tube videos listed to the right of the aforementioned video to see how the situation has become much worse since July 2016.
Pole shift is having a massive affect on migratory sea life, birds and land mammals, hence the progressive increase in mass animal deaths (google 'mass animal deaths')(See Mass animal deaths for 2017 and see links at the end of the article for the statistics from 2011! http://www.end-times-prophecy.org/animal-deaths-birds-fish-end-times.html ) over the past 14 years. ( See also the many videos on you tube listed under 'mass animal deaths' ) Whales, dolphins, fish and birds in their thousands world wide are washing up on shore and the numbers are increasing. The movement 490 Km east of the magnetic north and a similar movement of the magnetic south westwards are confusing migration routes. Even some land mammals are observed to have altered migration routes.