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The Arctic is Full of Toxic Mercury, and Climate Change is Going To Release it (washingtonpost.com)

We already knew that thawing Arctic permafrost would release powerful greenhouse gases. On Monday, scientists revealed it could also release massive amounts of mercury -- a potent neurotoxin and serious threat to human health. From a report: Permafrost, the Arctic's frozen soil, acts as a massive ice trap that keeps carbon stuck in the ground and out of the atmosphere -- where, if released as carbon dioxide, the greenhouse gas would drive global warming. But as humans warm the climate, they risk thawing that permafrost and releasing that carbon, with microbial organisms becoming more active and breaking down the ancient plant life that had previously been preserved in the frozen earth. That would further worsen global warming, further thawing the Arctic -- and so on. That cycle would be scary enough, but U.S. government scientists on Monday revealed that the permafrost also contains large volumes of mercury, a toxic element humans have already been pumping into the air by burning coal. There are 32 million gallons worth of mercury, or the equivalent of 50 Olympic swimming pools, trapped in the permafrost, the scientists wrote in a study published in the journal Geophysical Research Letters. For context, that's "twice as much mercury as the rest of all soils, the atmosphere, and ocean combined," they wrote.

4 of 195 comments (clear)

  1. Re:Another day by JoshuaZ · · Score: 5, Informative

    That a popular article doesn't give a perfectly accurate description shouldn't be shocking but if you go to the actual research article http://onlinelibrary.wiley.com/doi/10.1002/2017GL075571/full?wol1URL=/doi/10.1002/2017GL075571/full there concern is pretty clear about airborne and water soluble organic mercury compounds which are far more dangerous than metallic mercury or most inorganic mercury compounds. Metallic mercury and inorganic mercury is pretty safe. You can hold a ball of mercury in your hand without any real consequences. But organic mercury compounds can be much more dangerous. It took just a drop of dimethyl mercury https://en.wikipedia.org/wiki/Dimethylmercury on the outside of a glove to kill https://en.wikipedia.org/wiki/Karen_Wetterhahn. Of course, no one is going to directly die from this, but an increase in atmospheric and oceanic mercury levels could have a real negative impact on both the ecosystems and general human health.

  2. Re:Another day by Anonymous Coward · · Score: 4, Informative

    Why must you be so precious? He wasn't spiteful,you were wrong and you have to find some way to make it THEIR fault YOU were wrong.

    Own up to your errors. Stop blaming everyone else for them.

  3. Re:sniff test by cmseagle · · Score: 5, Informative

    Since when does the "sniff test" trump a paper in a peer-reviewed journal, written by scientists from the US Geological Survey? The introduction to the paper suggests a mechanism (with citations) by which mercury is concentrated in the permafrost.

  4. Re:Another day by Opportunist · · Score: 4, Informative

    We aren't talking about a river of silvery mercury running down the Hudson. What we're dealing with here, and what you'd know if you actually bothered to read the article, is mercury trapped in plants that cannot decay due to temperatures too low for natural decay to occur. Mercury, and that's what makes it such a dangerous stuff, binds readily to organic material. Any mercury that does exist gets sequestered in the plants that can actually live in such an environment, many of which never decay properly to release that mercury back into the environment.

    Thaw them and they will.

    --
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