What is permafrost? How did it come about? What s the harm?

Permafrost refers to a variety of rocks and soils that are below zero degrees Celsius and contain ice. Generally, it can be divided into short-term permafrost (hours, days, and half a month), seasonal permafrost (half a month to months), and permafrost (several years to tens of thousands of years). Permafrost on Earth Seasonal and short-term permafrost covers about 50% of the land area, of which permafrost covers 25% of the land area.

Permafrost is an extremely temperature-sensitive soil medium that is rich in subsurface ice. As a result, permafrost is rheological and its long-term strength is much lower than the instantaneous strength characteristic. Because of these characteristics, the construction of engineering structures in permafrost areas must face two major dangers:

Frost heave and thaw sink. As the climate warms, permafrost is degrading.

Encyclopedia has.

Permafrost can cause hazards to foundations, buildings and roads, and thawing permafrost can also pose a potential safety hazard.

First of all, the harm of permafrost to buildings, seasonal permafrost, low temperature in winter permafrost will expand, high temperature in summer permafrost will melt, such expansion and ablation will affect the foundation, if the permafrost is built on the building, there is a risk of tilting collapse.

In addition, the damage of permafrost to the road, the construction of roads in permafrost areas often encounters the problem of frost heave, and the roadbed and road surface have frost heave hazards, which are easy to twist and deform. Permafrost is prone to settlement and collapse after hot melting. Building roads in permafrost areas is difficult to construct and prone to danger.

Finally, the permafrost melts, and it is easy to form a swamp, which has potential safety hazards, and if you don't pay attention to any of the contents, you will fall into the swamp and suffer ** losses.

Global warming. Brought polar glaciers and permafrost.

The bacteria and viruses that have been sequestered in the Arctic permafrost will also come to our environment.

If both the Antarctic and the North Pole melted, the legendary prehistoric flood.

will appear again, and many "Noah's Arks" will be born around the world.

As a refuge for humanity.

Many people are indifferent to the melting of Antarctica, but the melting of Antarctica is the really terrible thing, more than 90% of the world's freshwater is in Antarctica, once the Antarctic melts will cause all the fresh water into the sea, many scientific research data are not uniform, some say 66 meters, some say 74 meters, but a basis is certain, the global sea level rises by at least 60 meters, 60 meters what concept is equivalent to 20 stories as high, sea level rise.

What will happen in 60 meters is the "S".

According to a report by Caijing.com, if global warming glaciers shrink and release microorganisms and viruses for tens of thousands or even decades, it will be a disaster, not a volcanic eruption, not a flash flood, the extinction of species, and the disappearance of cities.

Arctic permafrost covers about 23 million square kilometres in the northern hemisphere.

The land, most of which are permafrost, are millions of years old. In general, the deeper the permafrost, the older it is.

In addition to bacteria, Arctic permafrost contains many chemical components. These chemical components have been created by natural changes for thousands of years, due to accidents, or by human beings. However, due to climate change, the Arctic region is warming much faster than the rest of the world.

It is estimated that nearly two-thirds of the near-surface permafrost will disappear by 2100.

It may cause a viral outbreak hundreds of millions of years ago, and there are still 100,000 viruses in the permafrost, which will not be able to cope with it if they enter the human world at the same time. Thawing permafrost can trigger a massive tsunami, with seawater backing up and famine.

It may cause the spread of some virus hazards, and it will spread some unheard of virus outbreaks, which is not conducive to the development of nature, and may also destroy the balance of the soil, and some never-before-seen creatures appear.

It is very likely to cause environmental pollution, cause the greenhouse effect, and more seriously, cause the melting of ice and snow, may bring viruses, and cause seawater inflow.

There may be a lot of viruses, it may affect the survival of human beings, there may be many remains of prehistoric animals, it may also make the body temperature unbalanced, and it will affect the rotation of the earth.

Plants will die, plants will die, the environment will become harsh, the weather will become very hot, and this will also affect the safety of human life.

Permafrost refers to a variety of rocks and soils that are below zero degrees Celsius and contain ice. Generally, it can be divided into short-term permafrost (hours, days, and half a month), seasonal permafrost (half a month to several months), and permafrost (also known as permafrost, which refers to a layer of frozen soil that lasts for two years or more).

Permafrost is rheological and its long-term strength is much lower than the instantaneous strength characteristic. Because of these characteristics, the construction of engineering structures in permafrost areas must face two major dangers: frost heave and thaw settlement. As the climate warms, permafrost is degrading.

The tundra, also known as tundra or tundra, is derived from the Sámi word tūndra (genitive of tundar), which means "plain without trees". In physical geography, it refers to the environment where trees cannot grow due to low temperatures and short growing seasons; In geology refers to a variety of rocks and soils below zero degrees Celsius and containing ice. Generally, it can be divided into short-term permafrost (hours, days, and half a month), seasonal permafrost (half a month to several months), and permafrost (also known as permafrost, which refers to a layer of frozen soil that lasts for two years or more).

Permafrost on Earth Seasonal and short-term permafrost covers about 50% of the land area, of which permafrost covers 25% of the land area.

Hello, the impact of permafrost on planting is: 1. The permafrost cycle affects the accumulated temperature value of crops and affects agricultural production; 2. Permafrost affects the perpendicular distribution of soil moisture content, which makes the soil moisture migration lag significantly, and has no impact on the lithologic epoch of the soil. 3. Permafrost will also have a certain impact on irrigation quotas, agricultural drought and flood, farmland water conservancy, and groundwater, which may cause planting to reduce production and inability to plant; 4. Thawing early and late also has a certain impact on sowing, and thawing permafrost provides water for crop growth; The low temperature is conducive to the development of coarse black soil; The low temperature has few crop diseases and pests, which is conducive to the development of green agriculture; Frozen rot makes the soil in the early spring tillage layer too wet, and the temperature is low, which affects the germination of crop seeds. It's my pleasure to help you solve your problem!

Hope to get your trouble in the bottom left corner of a like thanks

The hazards caused by the thawing of permafrost are as follows:

First: thawing permafrost will cause a massive outbreak of viruses hundreds of millions of years ago.

There are a lot of viruses in the permafrost hundreds of millions of years ago, but now the greenhouse effect caused by environmental pollution is more serious, so the permafrost has shown signs of thawing. But once the permafrost begins to thaw, the viruses are completely released. When the permafrost melts, these viruses enter the ocean with the melted water, which can then spread to other parts of the globe.

Then the chances of human exposure to these viruses are even greater.

Once these viruses enter the human habitation area, human beings will come into contact with the virus, and because the virus outbreak will cause an epidemic, then hundreds of thousands or even tens of thousands of people will be infected with the virus, and countless people will die because of the virus. And there is not just one virus released at this time, it is likely that dozens of viruses will be released in an instant. If it is against a virus, it is likely that experts still have ways to fight it.

But if dozens of viruses are released at the same time, then there is no way to resist them.

Second: thawing permafrost will cause seawater to backflow.

The thawing of permafrost causes a large amount of melted water to pour into the sea, and the sea level rises rapidly. And when you pass through the lower ground, the sea water will pour in, and these cities are likely to be flooded in an instant. In addition, seawater will flow into the grain fields, and when these areas are contaminated, the salt content of the rice fields will increase, and the land environment will no longer be suitable for growing food.

Therefore, when the permafrost thaws, it is likely that the yield of grain will be greatly reduced.

With the current global food production, there is no guarantee that everyone in the world will be able to eat enough, and if food production is reduced, there is a high risk of famine. And the viruses present in these permafrost can also contaminate the land, which will destroy the land that can be cultivated by humans, and in the event of famine, it will cause a large number of deaths.

If the permafrost melts, it may cause the ground to collapse, because one of the characteristics of permafrost is that it is very hard and very strong, so it is very dangerous to melt.

I think that if the permafrost thaws, it may contain some ancient viruses or bacteria, and they will probably adapt to the current environment and continue to grow and develop.

The permafrost contains viruses and bacteria that are hundreds of millions of years old, and once the permafrost thaws, these bacteria and viruses will be released, and the survival of human beings will be threatened.

There are a lot of deadly germs in it, and if they melt, a lot of bacteria will come out and harm people. Then many people will die from such bacteria, which is particularly difficult to control.

If the permafrost melts, it will aggravate the earth's greenhouse effect and will have a great impact on our production and life.

What are the hazards of thawing permafrost? How will humanity be affected? After reading it, I understand.

What are the hazards caused by thawing permafrost? Expert: The resurgence of the dormant virus has come to an end.