Thongchai Thailand


Posted on: April 4, 2020









  1. The Arctic is predicted to warm faster than anywhere else in the world this century, perhaps by as much as 7°C. These rising temperatures threaten one of the largest long-term stores of carbon on land: permafrost. Permafrost is permanently frozen soil. The generally cold temperatures in the Arctic keep soils there frozen year-on-year. Plants grow in the uppermost soil layers during the short summers and then decay into soil, which freezes when the winter snow arrives. Over thousands of years, carbon has built up in these frozen soils, and they’re now estimated to contain twice the carbon currently in the atmosphere. Some of this carbon is more than 50,000 years old, which means the plants that decomposed to produce that soil grew over 50,000 years ago. These soil deposits are known as “Yedoma”, which are mainly found in the East Siberian Arctic, but also in parts of Alaska and Canada.
  2. As the region warms, the permafrost is thawing, and this frozen carbon is being released to the atmosphere as carbon dioxide and methane. Methane release is particularly worrying, as it’s a highly potent greenhouse gas. Arctic landscapes are changing rapidly as the region warms. But a recent study suggested that the release of methane from ancient carbon sources, sometimes referred to as the Arctic methane “bomb” didn’t contribute much to the warming that occurred during the last deglaciation 18,000 to 8,000 years ago, a period that climate scientists study intently, as it’s the last time global temperatures rose by 4°C, which is roughly what is predicted for the world by 2100. This study suggested to many that ancient methane emissions are not something we should be worried about this century. But in new research, we found that this optimism may be misplaced.
  3. The Arctic is turning brown because of weird weather and that could accelerate climate change. We went to the East Siberian Arctic to compare the age of different forms of carbon found in the ponds, rivers and lakes. These waters thaw during the summer and leak greenhouse gases from the surrounding permafrost. We measured the age of the carbon dioxide, methane and organic matter found in these waters using radiocarbon dating and found that most of the carbon released to the atmosphere was overwhelmingly “young”. Where there was intense permafrost thaw, we found that the oldest methane was 4,800 years old, and the oldest carbon dioxide was 6,000 years old. But over this vast Arctic landscape, the carbon released was mainly from young plant organic matter.
  4. This means that the carbon produced by plants growing during each summer growing season is rapidly released over the next few summers. This rapid turnover releases much more carbon than the thaw of older permafrost, even where severe thaw is occurring. This means that carbon emissions from a warming Arctic may not be driven by the thawing of an ancient frozen carbon bomb, as it’s often described. Instead, most emissions may be relatively new carbon that is produced by plants that grew fairly recently.
  5. Arctic lakes are growing sources of methane emissions to the atmosphere. Joshua Dean, Author provided. What this shows is that the age of the carbon released from the warming Arctic is less important than the amount and form it takes. Methane is 34 times more potent than carbon dioxide as a greenhouse gas over a 100-year timeframe. The East Siberian Arctic is a generally flat and wet landscape, and these are conditions which produce lots of methane, as there’s less oxygen in soils which might otherwise create carbon dioxide during thaws instead. As a result, potent methane could well dominate the greenhouse gas emissions from the region.
  6. Since most of the emissions from the Arctic this century will likely be from “young” carbon, we may not need to worry about ancient permafrost adding substantially to modern climate change. But the Arctic will still be a huge source of carbon emissions, as carbon that was soil or plant matter only a few hundred years ago leaches to the atmosphere. That will increase as warmer temperatures lengthen growing seasons in the Arctic summer.
  7. The fading spectre of an ancient methane time bomb is cold comfort. The new research should urge the world to act boldly on climate change, to limit how much natural processes in the Arctic can contribute to the problem. 



THIS CLIMATE ACTIVISM VERBIAGE TRANSLATES INTO PLAIN ENGLISH AS FOLLOWS: WE KNOW THAT WE SPENT DECADES GETTING YOU TO FEAR THE METHANE BOMB COOKING IN THE ARCTIC AS NOTED FOR EXAMPLE BY THIS SCARY LECTURE BY CLIMATE SCIENTIST AND ARCTIC EXPERT PETER WADHAMS  [LINK]  WHERE PROFESSOR WADHAMS SAYS “methane plumes being emitted and this is thought to be due to the fact that offshore permafrost in that area is now thawing because of the warmer water temperatures in summer. This is releasing methane hydrates as methane gas with methane plumes rising and coming up to the surface and being emitted because when methane is released from only 50 or 70 meters, it doesn’t have time to dissolve and it comes out into the atmosphere, and this is a very big climatic issue for the planet”. BUT THEN WE REALIZED THAT THE METHANE BOMB DOES NOT SERVE OUR ACTIVISM AGAINST FOSSIL FUELS AND THE COP26 AMBITION OF MR GUTERRES SO WE HAD TO FIND A WAY TO GET OUR LANGUAGE BACK TO FOSSIL FUELS AND TO THE CLIMATE ACTION AMBITION THAT MR GUTERRES WANTS IN THE FIGHT AGAINST FOSSIL FUELS.





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  • chaamjamal: Thank you Paul. This is a 50-year study at a decadal time scale. The effective sample size is about 5. There can't be a lot of statistical power in th
  • chaamjamal: Autocorrelation refers to correlations among different time spans of the same time series.
  • chaamjamal: The correlations reported are those between different time series over the same time span.
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