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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.
My personal favorite on this is the lack of knowledge about mercury in this. They make it sound like the melting of the ice caps will release a torrent of liquid mercury, even though the melting point of it is -38C, a temperature we regularly get above right now in the arctic, and also that mercury is usually caught up in various sulfate forms and is very rarely found in its metallic form in nature and as such doesn't melt until you get it up to several hundred degrees.
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.
From the study : "The turnover time associated with the microbial decay of frozen organic matter is ~14,000 years (Figure S28), making the Hg locked in permafrost effectively stable on human time scales. However, projections indicate a 30–99% reduction in near surface permafrost by 2100, and, once thawed, the turnover time for microbial decay drops to ~70 years (Koven et al., 2013; Schaefer et al., 2011). This makes the reservoir of Hg in permafrost soils vulnerable to release over the next century, with unknown consequences to the environment."
The title suggests a factual statement where the paper suggest a possible scenario outcome based on predictions. a possible sample of a clickbaity WPost science article which may require more study into how much of it is 'fake news' ?
I did however approve of the moderators including the original paper in the post, most impressive.
Oh you absolutely do "show problem," but the mercury affected you in a way that prevents you from seeing it.
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.
That absolutely wrong. Mercury, like just about all liquids, evaporates at room temperature. I mean, you don't need to know much about science to notice that if you leave a puddle of water on your kitchen floor alone it will eventually evaporate. Most of the mercury in the atmosphere is in its "metallic" or elemental form because mercury compounds are frequently reduced in nature.
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.
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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