Slashdot Mirror


Earth's Plants Are Countering Some of the Effects of Climate Change (economist.com)

A new study published in Nature Communications has found that Earth's plant life between 2002 and 2014 has absorbed so much carbon dioxide that the buildup of CO2 in the atmosphere has slowed down, despite humans pumping out more CO2 than ever before. The study also found that between 1982 and 2009, "about 18m square kilometers of new vegetation had sprouted on Earth's surface, an area roughly twice the size of the United States." The Economist reports: In 2014 humans pumped about 35.7 billion tons of carbon dioxide into the air. That figure has been climbing sharply since the middle of the 20th century, when only about 6 billion tons a year were emitted. As a consequence, the concentration of CO2 in the atmosphere has been rising too, from about 311 parts per million (ppm) in 1950 to just over 400 in 2015. Yet the rate at which it is rising seems to have slowed since the turn of the century. According to Dr Keenan, between 1959 and 1989 the rate at which CO2 levels were growing rose from 0.75ppm per year to 1.86. Since 2002, though, it has barely budged. In other words, although humans are pumping out more CO2 than ever, less of it than you might expect is lingering in the air. Filling the atmosphere with CO2 is a bit like filling a bath without a plug: the level will rise only if more water is coming out of the taps than is escaping down the drain. Climate scientists call the processes which remove CO2 from the air "sinks." The oceans are one such sink. Photosynthesis by plants is another: carbon dioxide is converted, with the help of water and light energy from the sun, into sugars, which are used to make more plant matter, locking the carbon away in wood and leaves. Towards the end of the 20th century around 50% of the CO2 emitted by humans each year was removed from the atmosphere this way. Now that number seems closer to 60%. Earth's carbon sinks seem to have become more effective, but the precise details are still unclear. Using a mix of ground and atmospheric observations, satellite measurements and computer modeling, Dr Keenan and his colleagues have concluded that faster-growing land plants are the chief reason. That makes sense: as CO2 concentrations rise, photosynthesis speeds up. Studies conducted in greenhouses have found that plants can photosynthesis up to 40% faster when concentrations of CO2 are between 475 and 600ppm.

8 of 186 comments (clear)

  1. Good for my gardens by pubwvj · · Score: 4, Funny

    Good for my gardens, my forest, my pastures.

    Oh, wait, all of them are sequestering carbon to the tune of 1.4 to 2.7 tons of carbon a year. Hmm... This could be counter productive. The plants might use up all that carbon dioxide. Better startup your SUVs to make up for this and keep the farms flourishing!

  2. And the spin begins by Anonymous Coward · · Score: 2, Funny

    it didn't take long for spin to make the climate emergency less dangerous. Silly rabbits

  3. Nature Finds A Way by Anonymous Coward · · Score: 2, Funny

    Suck it climate alarmists.

  4. Wrong by SuperKendall · · Score: 4, Funny

    Coral flourishes in lower pH conditions, and the ocean is used to higher levels at times that it will ever see from atmospheric CO2.

    --
    "There is more worth loving than we have strength to love." - Brian Jay Stanley
  5. Re:good for them by PolygamousRanchKid+ · · Score: 2, Funny

    good for us

    I'm not so sure that this will work out to be good for us. With an abundance of food, plants will evolve, become intelligent and eventually enslave humans to produce more CO2 for them.

    The plant overlord future isn't looking very "rosy" any more, is it . . . ?

    --
    Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
  6. Re: good for them by Anonymous Coward · · Score: 2, Funny

    That's it. We need to build a wall to keep the plants out.

  7. Re: good for them by reboot246 · · Score: 4, Funny

    I just received this text:

    That's how I planned for it to work.
    ~God

  8. Re: good for them by pipingguy · · Score: 4, Funny

    Shhhh! You're threatening taxpayer funding for #ClimateChange!