Tanda heard this and her heart tightened. "What’s the result of the discussion?"
"There are good and bad situations." Zhang Tianyuan took out a document and remembered the results of those seminars.
"Because the thickness of the ozone layer is different in different regions, the best result is that the thickness of the ozone layer in San Francisco may be thicker to block more ultraviolet rays, and at the same time, it is necessary to maintain a comfortable temperature due to monsoon or ocean current factors …"
Chloe Wang is responsible for delivering two identical documents to Tanda and the old woman. He looks very dignified.
It was before that seminar that he was recruited into this institute to watch, and he knew the result of the whole seminar.
Tanda rubbed the paper in his hand and suddenly dared not open it.
He looked at the old comrade-in-arms beside his eyes, and the other side also looked at the cover of the document in a daze.
Finally, the skinny old man sighed and said directly, "Zhang Huichang will be in trouble."
Zhang Tianyuan was more dignified than Chloe Wang.
"The other result is a bit complicated."
"As you know, the ozone layer is actually that the oxygen in the atmosphere is decomposed into its original state after being irradiated by high and short wavelength ultraviolet rays.
These oxygen radicals reoxygenate to form ozone and fall to the bottom of the ozone layer due to the specific gravity. Finally, they are reduced to oxygen again under the influence of long-wave ultraviolet radiation that lags behind and raises the environmental temperature … This dynamic equilibrium process constitutes the ozone layer as we know it. "
To put it bluntly, oxygen is synthesized at the top of the ozone layer, and then it falls to the surface and is reduced to oxygen, and then it is continuously circulated, thus forming the ozone layer.
Tanda and the old woman both nodded to show that they were old, but they still heard nothing.
Zhang Tianyuan opened a page of the document and pointed to the surface to tell the story of the destruction of the earth’s ozone layer by solar storms.
This process is simpler.
The high-energy mass ejected after the solar flare breaks out separates nitrogen and oxygen in the atmosphere and forms nitrogen oxides.
These nitrogen oxides, which are formed in large quantities and continuously undergo chemical reaction with ozone, will be reduced to oxygen and oxygen.
Moreover, the output ultraviolet radiation intensity will also increase after the solar flare erupts.
After these radiations are absorbed by the earth’s atmosphere, the atmosphere will be heated, which will lead to an increase in the temperature and density of the atmosphere, and ozone will naturally be decomposed in large quantities …
Generally speaking, the destruction of the earth’s ozone layer caused by these two methods should be small in scale and can be recovered in several years.
Zhang Tianyuan paused when he said this.
Then Tanda volunteered, "The solar storm 15 years ago was an exception, and our ozone layer was melted in almost one day."
"Yes," Zhang Tianyuan nodded and he rubbed his brow. "The intensity of the solar storm you experienced is unprecedented, which is what we are most worried about."
"Is it possible that that solar storm not only destroyed your ozone layer?"
Hearing this, the old woman seemed to be pinched one by one, and her hands were covered with scars.
What did Tanda also think of?
"I have seen a report before and there is a similar presumption that the solar storm may have caused the earth’s atmosphere to be destroyed …"
"Well," Zhang Tianyuan continued, "there was a view in other studies that the first mass extinction 4.4 billion years ago was caused by an extremely supernova explosion."
That explosion caused a gamma-ray burst to hit the earth directly for one second, destroying the ozone layer and destroying most of the gas components in the atmosphere.
"In the decades after the ray burst, the gas in the atmosphere recombined to form a large amount of nitrogen dioxide, which blocked ultraviolet rays but also blocked a large amount of sunlight …"
Speaking of which, Tanda’s unconscious beating of his eyebrows has shown his mood at the moment.
He interrupted, "We have a similar inference at this time."
Zhang Tianyuan looked up and saw his one eye. When he was white, he also realized the risk.
At that time, after the sun was blocked, the earth ushered in a permanent ice age. About 1% of the sea water froze and the sea level dropped by about 1 meter.
"This disaster lasted for about 400,000 years, when 5% of the earth’s species went extinct …"
"Is President Zhang worried that this time we will be the same as that mass extinction?"
"It is indeed possible to end up like this at this time."
Zhang Tianyuan’s eyes drooped with sighs in his tone.
After several hours, he knew that the shadow world was not complete.
Although the film seems to be a hopeful ending for nature to restore human beings.