Saturday , October 23 2021

Today's global warming reflects the conditions leading to the world's greatest extinction.


"Less than one percent of the Permian Ocean was a dead zone that was very similar to the present ocean," Deutsch said. Said.

Lar Seth Burgess, a geologist and volcanologist who is a geologist and a volcanologist, aki says a number of volcanic events that many scientists in Siberia believe have begun to launch mass extinction.

”When we look at the US, we're talking about pouring a sufficient amount of lava into the surface and entering the shell, if you look at the US from above, it was perhaps a mile long in a lava depth,“ he said.

Burgess, who investigates the volcanic events of the Siberian Traps, but does not work in the new Bilim newspaper, said the scientists believed that the magma from the surface emitted greenhouse gases causing extinction.

In addition, the earth's magma thresholds, on the other hand, have accumulated large amounts of coal, peat and carbonate minerals that make more carbon and methane into the atmosphere.

”This is how you drive the disappearance of the Permian mass by separating a large amount of magma into a basin rich in carbon-bearing deposits,“ he said.

. UW and Stanford research have taken the next step to understanding why the Permian died at the end,. Burgess said. Ümüz It combines what we think occurs in the climate with the fossil record and makes it elegantly. “

He received a supercomputer for more than six months to simulate any changes suspected of occurring in the Permian period due to volcanic eruptions. Computer models, the temperature and conditions in the world to explain what, while clouds, ocean currents and sea plants, such as simulating things enters the extraordinary details.

Researchers knew that surface temperatures in the tropics rose by about 10 ° C, because earlier scientific analyzes of fossilized teeth of serpentine-like creatures were called conodonts.

To run the models, the researchers pumped volcanic greenhouse gases to their simulations to adapt to the temperature conditions at the end of the Permian period.

As temperatures rise to a 10-degree mark, the model's oceans run out of oxygen, a trend that scientists are considering in today's oceans.

To measure how rising temperatures and less oxygen would affect animal species during the Permian period, the researchers used 61 modern creatures – crustaceans, fish, shellfish, corals and sharks. Researchers believe that these animals will have similar temperature and oxygen sensitivities as the Permian species, because animals have adapted to live in similar climatic conditions.

The researchers found that the effects of warming doubled over those created. In warm waters, animals need more oxygen to perform body functions. But lukewarm water cannot contain dissolved oxygen, which means they are less suitable for them.

In other words, because the bodies of animals demanded more oxygen, the source of the ocean fell.

In their models, researchers were able to measure habitat loss as species exposed to increasingly difficult ocean conditions. Surface temperature increase and oxygen loss were more important in the remote areas than the equator. Extinction rates were also increased at higher latitudes.

According to the study, animals living in tropical regions were accustomed to warmer weather and lower oxygen levels to pre-volcanic eruptions. As the world warmed up, they could move along with their habitats.

The sea creatures who preferred cold water and high oxygen levels were worse: they had no place to go.

"High latitudes, where the cold and oxygen are high – if you are an organism that needs such conditions to survive, these conditions will disappear completely from the Earth."

The researchers noted that in the modern oceans, warming and oxygen losses became more evident near the poles, and 252 million years ago, he drew another analogue between climate change and what happened today.

. The work tells us what is the end of the road if we allow the climate to continue. If we go further, we'll lose more species,, Deutsch said. "It's scary. The loss of species is irreversible."

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