Wildfires are digging carbon holes in the Arctic

But this insulation is being destroyed by climate change, which is warming the Arctic Four times faster As the rest of the earth. “In an undisturbed tundra ecosystem, permafrost is protected by overlying vegetation and soil organic layers from the effects of climate warming,” a climate scientist at the University of Illinois at Urbana-Champaign, the first of the new paper One author Yaping Chen said. “However, when a fire occurs, it kills vegetation and removes the insulating organic layer, allowing heat to penetrate down the soil profile of the melting permafrost.”

This makes it easier for the vegetation to dry out and Let it have more opportunities to ignite during more and more frequent thunderstorms. (More heat means more hot air rises into the atmosphere, This is how thunderclouds are formed.) The high temperature caused by climate change has triggered the formation of hot karst thawing, just as ice cubes may slowly melt on your countertop. But the wildfire is like burning flames on that cube.

Climate Change Connection Guide

The world is getting warmer and the weather is getting worse and worse. This is all you need to know about what humans can do to stop the destruction of the planet.

To make matters worse, the scorching wildfire darkens the ground, so now it will even heat up more Soon in the sun. If the terrain is flat, it will form a neat melting pit and grow, because water also easily absorbs solar radiation. All vegetation that was previously frozen will also sink to the bottom of the puddle, making the puddle darker.

Permafrost is basically a refrigerator that stores organic matter-if it warms and thaws, microorganisms will start to multiply in it, just like unplug the refrigerator, they will multiply on your food.Only these tundra microorganisms are chewing organic matter with a thousand years of history, releasing methane, which is a greenhouse gas 80 times stronger than carbon dioxide(If there is no water in the thawed permafrost and the plant material is drier, the microorganisms will release CO2 On the contrary, this is unlikely, because craters tend to form small ponds. )

“With hot karst, you can expose deeper and deeper layers of permafrost to the melting, which is much more effective than no hot karst,” Fara, a permafrost physicist at the University of Alaska Fairbanks Kimir Romanovsky said that he was not involved in this work. “The hot karst process can turn a relatively dry surface into a kind of wetland, and the wetland is a producer of methane.”

A researcher looks at an expanding hot karst crater.

Photography: Christian Andresen and Mark Lara

Source link

Leave a Reply

Your email address will not be published.