Mystery Of The Silurian Neva: As An Asteroid Helped Life On Earth


The decay of the asteroid in a pair of hundreds of millions of kilometers from our planet sharply reduced the stream of sunlight, reaching its surface, which caused a powerful glaciation – but it only went to the benefit of life on Earth.


One of these small meal mehorites, fallen to Earth 466 million years ago. / Field Museum, John Weinstein.

But the main consequence of the stratosphere is not aesthetic. Calculations show that with an increase in dusting of 10-100 times the surface of the Earth should begin cooling. So, the offensive of the glacial era in such conditions is quite logical.

Need to Make A Reservation: Generally Glacial Era for Our Planet Are Notpins. The Author of the New Work Note That In The Last Half A Billion Years, The Ears Of Alternation Of Glacial and Intergaren Periods Were Only Three. The Oldest of Them – In Ordovic, The Second – In Devon-Perm (After One Hundred Million Years After Ordovik), And The Third Began 35 Million Years Ago, WHEN ICE COVER FOR ANTARCTICA. The Specificity of the Glacial Periods Are Generally Not Accompanied by An Increase In Biodiversity. On The CONTRARY, WHEN OCCUR, THE TYPES DIE OUT. ALL This Makes The Riddle of the Asteroid of the Ordovik Era And The Ice Period CauseD by It Is Particularly Difficult.

Smooth Glaciation?

Scientists Who Have Published a New Job See A Possible Answer to This Riddle in Graduality Of Global Cooling 466 Million Years Ago. The Fact Is That Usually The Fall Of The Asteroid Leads to An Instant Huge Emission of the Impact to the Upper Layers of the Impact to the Upper Layers of the Atmosphere. The Destruction of the Asteroid in Distant Space Leads to Another Scenario.

ON CALCULATIONS, IMMEDIATELY AFTER THIS EVENT IN THE EARTH’S ATMOSPHERE PER YEAR CAME FROM 40 TO 400 MILLION TONS OF METEORS, BUT ALMOST ALL OF THEM WERE VERY SMALL, NOT LARGER THAN DOZEN METERS IN THE DIAMETER. Such bodies cum of life as Chelyabinsk or Tungusky meteorite, blowing up in the stratosphere. Only their small fragments reach the surface and cannot cause a strong explosion there and emissions up. Therefore, the accumulation of stratospheric dust goes smoothly, and not large jerks. As a result, the cooling occurs not at the moment of extinct dinosaurs, for dozens of degrees in the first year. On the contrary, the average annual temperature can be reduced only a few degrees in a couple of millions of years.

This creates completely different conditions: thermal-loving animals migrate closer to the equator, and their place is beginning to occupy new species that appear as a result of adaptation to completely new for the continuous conditions. That is, in itself, climate change can be safe if slowly.

At first glance, practical conclusions can be made of this observation of the new work. It turns out if in small quantities to add dust to the stratosphere, it is possible to curb the current global warming, without causing extinction due to too fast drop temperature. Philip Heck (Philipp Heck) from Chicago University (USA) with a large skepticism refers to such ideas. Calculate the geoenzhinirring project on dust in the stratosphere is very hard, and the slightest error is extremely dangerous. "If something goes wrong, everything will be worse than it is now (in the period of global warming. – APPROX. Avt.) ", – Confident scientist.

Nevertheless, the new job shows really unexpected: the global cooling, which is definitely considered definitely a negative phenomenon, it seems, may not be such an if it happens quite smoothly. And perhaps the destruction of a giant asteroid 466 million years ago, in fact, helped earthly life – although extremely unusual, "cold" way.


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