When the ground no longer freezes enough to form a barrier, these pollutants seep into rivers and ponds, destroying highly sensitive ecosystems. We think this could also be a dangerous situation for people living in the north,” Langer says.
That water eventually ends up in the ocean, riding currents to other places. Toxic substances can also become airborne. In fact, the Arctic is already covered in lead dust from burning leaded gasoline. Mercury was also able to escape mining operations by absorbing water and air. “Mercury from the burning of coal and fossil fuels a century or two ago is still present in our environment,” says Kevin Schaefer, a climate scientist at the University of Colorado Boulder who studies permafrost pollutants. It circulates in the biosphere,” he said. He participated in a new paper.
Human activity in the Arctic will only exacerbate the thaw. Dark roads absorb the sun’s energy and heat the soil. Digging up dirt and throwing it over snow darkens the whiteness that normally reflects light from the landscape. Car tires chew up dirt. “Environmental conditions are already changing rapidly,” said Dmitry Streletskiy, a climate scientist at the University of Washington George who studies permafrost, but was not involved in the paper. “But of course, in addition to these rapid changes, there is a concentration of human existence. There is industry and infrastructure. amplify It is a climate-related change. ”
Oh, and the huge new Willow drilling project in Alaska that the Biden administration just approved? It will also be permafrost. “Think about what it takes to establish a pipeline,” he says Miner. “We will need roads. People will come and go and trample the permafrost. So it’s just impact on impact.”
This new paper gradually Thawing permafrost. However, permafrost can disintegrate much more quickly, burrowing into what is known as thermokarst. When the ice becomes liquid water, it shrinks in volume and forms craters where microbes produce methane, a very potent greenhouse gas. This further warms the atmosphere and accelerates permafrost thaw. This is a dangerous climate feedback loop.
Even more dangerous is the surge in wildfires as the Arctic warms. Clearing a polluted area releases toxic smoke. That would make the thaw even worse: Scientists previously calculated that thermokarst formation has accelerated by 60 percent since 1950 in northern Alaska thanks to wildfires.
In other words, Langer says their paper’s predictions are “pretty conservative.” Some sites may unzip even faster.
Permafrost is already transforming communities in the Far North. Airport runways are sinking, roads are crumpling, buildings are collapsing. “It’s no longer an obscure thing that might happen in the future. It’s happening today, even as we speak,” Schaefer says. “Damage to this infrastructure due to thawing permafrost would be very costly and very difficult to resolve. These areas are very remote. There is nothing that can only be done in the summer.”
For example, a thermokarst hole in an airstrip could cut off surrounding communities that depend on airborne supplies. If you can’t fly, you can’t get out of many places in the Arctic. “It’s not like Lower 48. If you don’t go to Denver, Colorado he’s going to Springs,” Schaefer says. “These are all very critical infrastructures that are very difficult to build and maintain.”
But this new paper is at least a step towards localizing the problem, and shows where the government needs to clean up. “To manage something, you have to measure it,” says Miner. The next step requires a large push. Like, for example, the U.S. Environmental Protection Agency when he started cleaning up Superfund sites in the 1980s. But with this patchwork of countries and companies contributing to the turmoil, it’s not clear when or if that work will begin.
