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In a massive new study published Wednesday in the influential journal Nature, no less than 50 authors from around the world document a so-called climate system “feedback” that, they say, could make global warming considerably worse over the coming decades. That feedback involves the planet’s soils, which are a massive repository of carbon due to the plants and roots that have grown and died in them, in many cases over vast time periods (plants pull in carbon from the air through photosynthesis and use it to fuel their growth). It has long been feared that as warming increases, the microorganisms living in these soils would respond by very naturally upping their rate of respiration, a process that in turn releases carbon dioxide or methane, leading greenhouse gases. It’s this concern that the new study validates. “Our analysis provides empirical support for the long-held concern that rising temperatures stimulate the loss of soil C to the atmosphere, driving a positive land C–climate feedback that could accelerate planetary warming over the twenty-first century,” the paper reports. This, in turn, may mean that even humans’ best efforts to cut their emissions could fall short, simply because there’s another source of emissions all around us. The very Earth itself. “By taking this global perspective, we’re able to see that there is a feedback, and it’s actually going to be massive,” said Thomas Crowther, a researcher with the Netherlands Institute of Ecology who led the research published Wednesday. The new study is actually a compilation of 49 empirical studies, examining soil carbon emissions from research plots around the globe. The different studies produced variable results, including some cases in which soils actually pulled carbon from the air rather than releasing it. However, the researchers insist there was a pattern globally that was “predictable”: Soil carbon losses generally tended to track how much warming a region had seen, and how thick the upper soil layer was. The paper therefore found that the biggest losses were in Arctic regions, where soils are warming rapidly and also where they are quite thick — but also that well down through the mid-latitudes, soils were also losing carbon. And the net result for the research plots as a whole was a loss of soil carbon. The paper then extrapolated these findings for the globe, finding that by the year 2050, the planet could see 55 billion tons of carbon (which converts to 200 billion tons of carbon dioxide, were it all to be released in this form) released from soils. That’s if we continue on with a “business as usual” scenario of global greenhouse gas emissions and accompanying warming.
originally posted by: IgnoranceIsntBlisss
They have a list of these supposed end all feedback loops. If it were so direly delicate then there'd be all manner of extreme swings across the millenia. Yet, according to Al Gore, the climate hasn't changed hardly a lick for 400,000 years until man showed up.
What does this news mean in terms of Donald Trump's plan to un-do Nasa's Climate Change budget? Obama's EPA regulations? Etc..? What says ATS?
originally posted by: seasonal
a reply to: lostbook
If global warming oops climate change is real.
NASA Study Finds Earth’s Ocean Abyss Has Not Warmed
www.nasa.gov...
Satellite Data: No Global Warming For Past 18 Years
cnsnews.com...
originally posted by: seasonal
a reply to: lostbook
If global warming oops climate change is real.
NASA Study Finds Earth’s Ocean Abyss Has Not Warmed
www.nasa.gov...
Satellite Data: No Global Warming For Past 18 Years
cnsnews.com...
The paper then extrapolated these findings for the globe, finding that by the year 2050, the planet could see 55 billion tons of carbon (which converts to 200 billion tons of carbon dioxide, were it all to be released in this form) released from soils.