What are the advantages of permafrost? What are the dangers of permafrost degradation? What are the

Summary:1In areas where permafrost develops, the glacial topography remains fairly intact because it has just been freed from glacial cover.

2.During the day, due to the strong solar radiation, the ground heats rapidly, the topsoil melts, and the water evaporates; At night, the topsoil freezes, and the water vapor in the lower layer moves to the surface and condenses, which increases the water content of the topsoil, and repeatedly carries out the alternating effects of thawing and wet-drying, which promotes the formation of the spongy porous crust layer of the topsoil. In addition, in the warm season, the topsoil melts during the day and freezes at night, because the gradual downward warming or deceleration from the surface is always roughly parallel to the horizontal level of the surface, so on the arid topsoil, the strong freezing effect often forms cracks in the topsoil.

3.Glacial marsh soil is a permafrost soil with a normally moist soil moisture regimen, a latent dark surface layer with a carbon to nitrogen ratio of 13, and a palbrad AB layer with pH. The glacial marsh soil has low organic matter content, low cation substitution, slightly acidic to acidic reaction, and nutrient deficiency.

4.The climate of the permafrost distribution area is severe cold or dry, and there is a permafrost layer, the natural fertility of the soil is very low, and it is not suitable for agricultural use without modification, and there is the main feed for deer on the glacial marsh soil - lichen, so the development of deer breeding industry is one of the important ways to use glacial marsh soil.

Or use the materials upstairs!

Utilization and improvement.

The climate of the permafrost distribution area is severe cold or dry, and there is a permafrost layer, the natural fertility of the soil is very low, and it is not suitable for agricultural use without modification, and there is the main feed for deer on the glacial marsh soil - lichen, so the development of deer breeding industry is one of the important ways to use glacial marsh soil.

I feel that permafrost is a great help in the prevention and control of plant diseases. Many pathogens do not survive.

What are the dangers of permafrost degradation?

The degradation of permafrost leads to the degradation of forests and grasslands, and the ecological vulnerability is intensified. The decline of water level in some areas could not meet the growth of vegetation, and the degradation of permafrost significantly changed the stability of the regional landscape and ecosystem, and the resulting problems were manifested in the sharp decrease of the natural forest belt dominated by Larix gmelinii in Xing'an, and the northward migration of the natural forest belt.

Permafrost:

It leads to the flow of shallow surface water to the deep layer, which changes the characteristics of regional water cycle and recharge and drainage, and accelerates the cycle and alternation of surface water and groundwater, which is conducive to the development and comprehensive utilization of water resources.

Permafrost disadvantages:

Freeze-thaw disasters such as frost heave and thaw subsidence induced by permafrost induce adverse effects on the operation of regional roads, railways, oil pipelines and airports, and increase their maintenance costs.

Key initiatives for permafrost conservation

Reducing greenhouse gas emissions remains an important initiative. Climate warming and human activities are the "main culprits" of permafrost degradation. Therefore, mitigating climate change and mitigating the impact of human activities is an inevitable choice for the protection of permafrost.

Strengthen the investigation, research and monitoring of permafrost and freeze-thaw disasters, and carry out research on the relationship between forest ecology, wetland ecology, and engineering stability; Through the monitoring of permafrost and cold zone environment, the degradation mechanism of permafrost and cold zone environment should be studied, and adaptive and remedial measures should be taken in time to protect and restore the regional environment.

For areas with large permafrost degradation and sensitive to environmental changes, regional ecological and environmental protection efforts should be strengthened.

In the rock layer or soil layer in the permafrost area, there are cracks and pores of different sizes, they are often filled with water, with the drop of temperature in winter and night, the water gradually freezes and expands, which plays a great role in the surrounding rock, so that the cracks continue to expand. In the summer or during the day, when the ice melts due to the rising temperature, the surface water can be injected again. The freezing and thawing processes caused by the periodic change of solid temperature alternate, resulting in the fragmentation and loosening of the ground soil (rock) layer, which is called freeze-thaw weathering.

Freeze-thaw weathering not only causes the loosening and disintegration of ground materials, forming a large amount of detrital materials in the permafrost area, but also produces ice edge phenomena such as ice wedges and soil wedges in sediments or rock masses.

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.

With the intensification of global warming, permafrost has attracted more and more attention. Once a large amount of permafrost melts, the threat to humanity cannot be underestimated. Permafrost is the scientific name for permafrost, also known as permafrost.

It is essentially a soil-rock layer, but it has been frozen for many years without thawing, and the distribution of permafrost on Earth gradually thins from high to low latitudes.

In the Arctic, the thickness of permafrost reaches more than a kilometer, while near 48 degrees north latitude, the thickness of permafrost decreases to 1-2 m, which is also the southern boundary of permafrost. Permafrost is usually divided into upper and lower layers, with the upper layers cycling between thawing and freezing with the seasons; The lower layer is in a state of long-term or even permanent freezing under the existing earth's climatic conditions.

In most cases, the water content in the permafrost even exceeds the potential water saturation of the surface material. However, in some cases, permafrost does not necessarily contain water. For example, in some places, the main rock type in permafrost is non-porous bedrock.

The conditions under which permafrost forms are numerous. The first is temperature. The average annual temperature must be below freezing.

Otherwise, only seasonal permafrost can be formed, and it cannot become permafrost. Second, there must be long-term accumulation. The study found that the Arctic ice layer is more than hundreds of meters thick, and the atmospheric low temperature conduction is not deep.

Therefore, the time of formation has gone through at least hundreds of years or even longer. Third, permafrost is usually concentrated in large quantities at high latitudes, with the only exception being the permafrost belt of the Tibetan Plateau. High latitude and high altitude are important conditions for the formation of permafrost.

These conditions mean that permafrost is not something that can be formed at will, which means that we humans cannot destroy this permafrost at will, because if we destroy this permafrost, and permafrost is a certain threat to human life, but this permafrost is not very simple to form, so we need to protect permafrost.

Permafrost refers to permafrost. It is essentially a layer of soil and rock, which is due to the fact that the temperature in these areas is very low and there is snow all year round, so this phenomenon is formed. They are generally concentrated in high latitudes, and there is also the permafrost of the Qinghai-Tibet Plateau.

It plays a very important role in promoting ecological balance and maintaining the balance of atmospheric temperature.

It is a kind of soil layer that has been frozen for many years and cannot be melted, and the temperature difference between high latitude and low latitude is very large, resulting in the soil being frozen, very hard, like a stone, which cannot be used, and the function is to stabilize the ecological environment and protect the plateau climate.

Permafrost refers to a layer of soil and rock that has been frozen all the time and has not thawed.

If formed: the temperature is too low, freezing for many years.

Function: There are natural gas resources in the permafrost, which protects the ecological environment.

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!

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