About 66 million years ago in the shallow sea, the site of which today are the Gulf of Mexico and the Yucatan Peninsula, hit an asteroid with a diameter of several kilometers. Its estimated the fall was released two million times more energy than the most powerful hydrogen bomb in the history of mankind is called “King” that the Soviet Union blew up in 1961.
“Fell” asteroid struck the Earth in the crater (which we now call Chicxulub) with a diameter of about 200 km and a depth of 30 km, causing a monstrous tsunami. She was thrown into the air a huge amount of aerosols.
as a result of her fall became extinct three quarters of sea and land, including those prevailing in the world through 100 million years of the dinosaurs. This was the fifth great extinction in the history of our planet today.
German scientists from the Berlin Institute of Climate Research (PIK) published it in writing, “Geophysical Research Letters” possible scenario of the disaster.
digital climate models, the researchers tested how the aerosols ejected into the atmosphere after the fall of the asteroid schłodziły climate, bringing the end of the Mesozoic era and the beginning of kenozoicznej in which the place of reptiles, ruling over the Earth was taken by the mammals.
script researchers from RUSH the worst impact on the climate then the Earth was raised to heaven drop sulphur compounds. I think other dust thrown planetoid quickly fell to the Ground. And sulfur compounds, including droplets of sulfuric acid, hovered in the sky in large numbers and for so many years, which led to strong global cooling.
the Germans estimated that at least three years – and maybe even 16 – average temperature fell, at least 26 ° C and below 0 ° C! Many areas of Land allotment, so that the frost and the glaciers have seriously increased. Even in the sweltering tropics, the average temperature dropped from 27 ° C to almost 5 tbsp.
Powerful upheavals had taken place in the ocean. Very cold surface, the water began to subside, and warmer by far, it the water from the deep come to the surface. This sharp kotłowanie ocean waters zaburzyło the flow of heat and organic compounds, greatly disturbing not only the atmosphere, which is largely determined precisely by the ocean and floating in the currents), and sea life.
German scientists claim that a return to a warmer world lasted more than 30 years. Barely three decades was enough to radically change life on Earth. Lost powerful reptiles, and mammals have received that in the subsequent tens of millions of years of animals the size of squirrels can grow to the size of a human, elephant or lion.
- Then global cooling was a turning point in the history of the Earth, – says Julia Brugger PEAK, the main author of the work published in “Geophysical Research Letters”.
- This is a real irony that the biggest danger in the world today is not natural cooling [usually the Earth's climate should now be cooled again], but we caused global warming – adds another author George Feulner.
According to many scientists, now we are dealing with the sixth great wymieraniem species in Earth’s history. And this disappearance, which themselves became the reason.
No comments:
Post a Comment