Sunday , December 5 2021

Scientists detect the causes behind the Great Start event


Scientists think they've figured out the dominoes to fall that led to the largest mass extinction Earth and worry that climate change caused by man put the planet on a similar path vaguement.

Around 250 million years ago, about 90 percent of marine life and 70 percent of the land went to the bottom in life & # 39; what is now called the Great Death.

Scientists have long speculated that massive volcanic explosions led to kataklismiku event, but how it worked was still a bit fuzzy.

It was the lava itself. A new study in Thursday's journal science used complex computer simulations to design what happened after nqattgħu volcanoes: This led to rising ocean temperatures b & # 39; about 11 degrees Celsius, then escaped by sea water of oxygen.

That hot water with & # 39; & # 39 basis; oxygen caused the mass death of sea, especially over & # 39; away from the equator.

After nqattgħu volcanoes, the level of carbon dioxide to trappa heat rose to a level & # 39; more than 12 times what it is today, said Justin Penn, a researcher in Earth sciences in University & # 39; Washington.

The water loses oxygen when heated, much like a stuffed brown clear, Mr. Penn said.

Scientists looked at dozens of & # 39; modern species to watch out & # 39; & # 39 jiġrihom in, warmer water and oxygenated by oxygen and help them understand the past sunset.

One of the keys research is that more species died & # 39; away from the equator. This is because tropical species were more acclimated to low levels & # 39; oxygen, Mr Penn said.

While humans do not warm the Earth anywhere near as much as what happened naturally 250 million years ago, "it puts our future in the category of & # 39; contenders for real catastrophe", said co-author & # 39; study Curtis Deutsch, Earth scientist at University & # 39; Washington.

The ancient discovery "shows almost exactly what lies at the end of the road we have on us," said Mr. Deutsch. "We really are doing the same thing for the climate and the oceans of the World."

The study estimates that if the heat trapping of carbon dioxide emissions continue at current levels, by the year 2300, the globe will experience 35-50 percent of the level & # 39; extinction appeared in the Great death.

The paleontologu the University & # 39; Leeds Paul Wignall said that no current global warming scenario envisages 20 degree & # 39; heating in the following centuries, so it can & # 39; there several years.

However, even in adverse event 10 percent as the Great Dying "is korox," said Wignall, who was not part of the study.

Scientists outside witnesses said the study provides skjesta glimpse at the possible future of the World.

"Because we're nsaħħnu the World b & # 39; a rapid rate, results from this study can be very useful to understand" what happens to life in & # 39; future oceans, South scientist University of Southern World David Bottjer said in & # 39; email.

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