It’s the third of March of the next year, which means that the rainy season is not far away from us. In winter, people are looking forward to snow, because in the past ten years, due to the deterioration of the ecology, snow has become a memory in many people’s hearts, and there is no snow in many places throughout the winter. Perhaps only friends living in the northeast can see snow every year.
Winter goes to spring. After the warm weather, the rainy season will come slowly. People’s enthusiasm for rain is far less than that of snow, because too much rain will lead to waterlogging. Especially friends in the south, when summer comes every year, they are most worried about typhoons and continuous heavy rain. For human survival, continuous rainfall will bring huge survival crisis.
Just imagine, if there is a year of continuous rain, what will be the result? It is estimated that it will be a disaster for all mankind. In fact, this kind of continuous rainfall for a long time will hardly happen now. Even if it rains continuously for more than one month in some places, there will be dark clouds and scattered clouds, revealing a clear sky. But in the long years of the earth, there is a period of time that has lasted more than one million years of rain.
We can’t imagine what it would be like to have more than one million years of continuous rainfall. If it happened now, it would be difficult for human beings to survive. Even in ancient times, this million year rainfall also caused the extinction of most of the organisms on the earth. It was the mass extinction event that happened in the Triassic period 234 million years ago.
The main reason for this mass extinction is the rainfall that lasted for more than one million years. So how did such a long continuous rainfall happen? How is it possible to have such a long rainfall climate on earth? Some people may think that 234 million years ago, millions of years of rainfall is just a guess of scientists, there is no real evidence.
In fact, 234 million years ago, this ancient rainfall has been widely recognized by the scientific community, because scientists have found relevant evidence in all parts of the earth. We all know that time can’t go back. We can’t directly see and understand what happened in ancient times. Although the years can not be reversed, but the traces of years can be preserved to countless years.
Scientists mainly rely on various geological rocks to study and explore the history of the earth. What great events happened to the earth in ancient times? For example, we know that 65 million years ago, there lived a species of dinosaur that dominated the world. The reason why we know about dinosaurs is through a large number of dinosaur fossils found all over the world.
If the earth 234 million years ago had experienced rainfall lasting for more than one million years, the earth’s rocks would have left some evidence. Scientists came to this conclusion through a unique red sandstone, which was formed in the Triassic period. Why did this red sandstone form in the Triassic period?
We have to start with the special earth plates in the Triassic period. I believe many people know that the earth is divided into six plates, but few people know that in the Triassic period 234 million years ago, there was only one plate in the whole earth, namely Pangea. At that time, the plates were still connected and did not separate.
At that time, there was only one huge Pangea continent on the earth, and the area was too large, so the humid air formed by the ocean could not reach the inland area at all, which resulted in the long-term drought and little rain in the inland area. Under this climate, a unique red sandstone was formed. In the last century, scientists found a large number of sedimentary rocks containing this red sandstone in coastal areas such as Japan, Argentina and Italy. To know where these sand stones should be in the interior of the continent, how did they come to the coastal areas?
There is only one reason why these red sands can run from inland to coastal areas, which is the result of a large number of long-term rain erosion. Scientists predict that it will take a long time for precipitation to form a large number of sedimentary rocks in coastal areas, which may be more than one million years. Therefore, scientists speculate that in ancient times, the earth experienced a heavy rain lasting for more than 1 million years.
So how did this prehistoric heavy rain come into being? To form such a long period of heavy rain, the earth’s ecosystem must have undergone drastic changes. So what kind of drastic changes? Some friends may have thought that, in fact, the root cause of all this is the division of Pangea. A unified Pangea continent, due to geological activities to split into six plates, is bound to be a breathtaking geological movement.
The duration of plate splitting is long, and in the process of plate splitting, strong geological activities lead to large-scale volcanic movement, a large number of carbon dioxide erupted from the earth’s interior, released into the atmosphere, bringing a strong greenhouse effect.
The greenhouse effect caused the earth’s temperature to rise sharply 234 million years ago. We all know, we all know, rain is a kind of convective weather, the surface water after evaporation, with the updraft to the troposphere. The troposphere is characterized by the lower temperature as it goes up. When the water vapor rises to a sufficient height in the troposphere, it will re condense into raindrops and fall to the ground.
Therefore, the stronger the updraft is, the easier it is to form rainfall. The main reason for the updraft becoming stronger is that the temperature is higher. The higher the temperature is, the stronger the hot air is, the easier it is to form strong convective weather and rainfall weather. Research shows that at that time, the average sea surface temperature of the earth’s equator reached or even exceeded 40 degrees Celsius. At such a temperature, a large amount of sea water was evaporated into the atmosphere. With the help of hot air, they continuously formed cumulonimbus clouds and spread to Pangea continent. As a result, there was continuous heavy rain on almost the whole earth.
Since it takes a long time for Pangea to break up and stabilize, during this period of time, geological movements and volcanic eruptions continued, and the resulting carbon dioxide emissions also continued. Therefore, the continuous rainfall caused by high temperature weather also continued. Only when the plate splits and stabilizes, the volcanic activity stops, the temperature gradually drops and the rainfall stops.
Although the long one million years of heavy rain has ended, the consequences have changed the face of the earth, and the ecological structure of Pangea has been completely lost. The most obvious impact is a large number of biological extinctions. This prehistoric heavy rain may cause 90% of the biological extinctions on the earth.
Nature is very fair. Ecological upheaval will bring disaster and rebirth. Although prehistoric heavy rain made more than 90% of the creatures extinct, it promoted the great leap forward of life evolution. After the heavy rain, there is a kind of creature began to rise, it is dinosaurs. Before the heavy rain, dinosaurs accounted for only 5% of all vertebrates on land, while after the heavy rain, the proportion reached 90%.
This prehistoric heavy rain once again shows us the power of nature. Although human science and technology are developed, the power of nature is still incomparable. Now the environmental pollution caused by human industrial activities is challenging the dignity of nature. A large amount of industrial carbon dioxide is continuously emitted into the atmosphere, resulting in the rising of carbon dioxide in the atmosphere, and the resulting greenhouse effect is also higher and higher.
If this situation is not controlled, once the greenhouse effect is out of control and the global temperature returns to 234 million years ago, it is likely to trigger persistent and long rainfall again. At that time, the earth will once again usher in mass extinction. Even if human beings can survive without extinction with the help of science and technology, the impact can seriously damage human civilization and make human development retrogressive.
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