The global warming causes the deaths of the forest now, as did during the extension of Permian-Triassic
Ina Fassbender / AFP by GETTY images
After a sharp increase in carbon dioxide levels 252 million years ago, the death of the forests leading to a long-term climate transfer, that the greenhouse conditions continued millions.
Scientists who work to identify this event, which causes the largest mass extinction of land history, warned that the same story can stretch the greenhouse gases.
The Permian-Triassic Persinction event thought to be triggered by many volcanic activity in the region now Siberia, which raises the CO2 level in the air.
The temperature above the planet increases up to 10 ° C and, in equatorial regions, the average surface temperature is filled with 34 ° C) – 8 ° F) – 8 ° C.
These circumstances continue to nearly 5 million years, resulting in extinction of More than 80 percent of sea species and 70 percent of the vertebrate terrestrial familiesaccording to some estimates.
While some researchers recently argued which these mass extinction events have a small impact on terrestrial ecosystem, Andrew Merdith At the University of Adelaide in Australia convinced that, it began 252 million years ago, life knelt.
“Life pockets can survive by a reduction in the masses of small enclaves or oases here, but you can go in many fossil sections and see that the whole ecosystic dies,” says Merdith.
She and her partner studied the fossil record to find out why the super greenhouse event urging mass masses of 5 million years instead of climate models that predicted it.
They knew that, in many swatting of the land, the forests with canopies of up to 50 meters were replaced by the hardimeflags of 5 meters of 5 meters long. Peat Bogs, another ecosystem that stores many carbon, also wiped into tropical regions.
Using a global and geochemistry computer model, researchers show that loss of these ecosystems means that CO2 levels remained high in millions. This is primarily because plants have a great impact on During the perioda process that draws carbon from the atmosphere and stores it with rocks and lands in high timescales.
There is a loud resemblance at the moment, like Merdith, because the level of CO2 in the air adds rapidly. If the temperature continues to rise, then the tropical and subtropical forest can struggle with adaptation, Crossing a threshold Where plants can no longer make the most important role in climate balancing.
Merdith said the new job shows that you didn’t get a “ping-pong effect”, where the situation was easy to recover after the forests of forests disappear.
“Unlike an eyehouse, then you go to a greenhouse a little, then throw straight into an eyhouse,” he said. “Once you start rolling the ball, the ground will find the new balance point, which doesn’t need what it was.”
Katrin Meissner At the University of New South Wales in Sydney, Australia, not involved in study, it says rebuilding these events “
However there is a lot of uncertainty to what is happening in the ocean this time, he said. “The ocean has more carbon than the ground and in the air tied together, and we never know what happened to the biology of Ocean, chemistry and physical circulation at the time,” Meissner said.
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