The utilization and improvement of permafrost, and the adverse effects of permafrost thickness thinn

This effect is as follows:

1. After the permafrost is thinned, the organic cherry tree ingredients in the lower layer, as well as ancient bacteria and viruses, the river water becomes black, the water quality becomes poor, and the river water and the Arctic Ocean seawater are polluted; At the same time, the spread of a large number of ancient bacteria and viruses has brought diseases to people.

2. The reduction of permafrost causes the degradation of forests and grasslands, and the spine of ecological fragility is aggravated; In some areas, the water level decline could not meet the needs of vegetation growth, and the reduction of permafrost significantly changed the regional landscape and ecosystem stability, resulting in a sharp decline in natural forest belts.

1. The time of seasonal frozen soil is generally half a month to several months, and the time of permafrost is generally several years to tens of thousands of years.

2. Permafrost is mainly distributed in the northern part of Eurasia and North America. Permafrost is also present in high mountains and plateaus at low and medium latitudes. Seasonal permafrost is generally found in areas with low temperatures or low latitudes.

The presence of permafrost is mainly influenced by temperature. The higher the latitudes, the cooler the temperature, and because the southern hemisphere has less land area, permafrost is mainly found in Eurasia and northern North America. At the same time, the higher the temperature, the lower the temperature, in some high mountains, where the temperature is below zero all year round, so there are also permafrost in the middle and low latitudes of the mountains and plateaus, such as the Andes Mountains in the Americas, the Qimazaro Mountains in Africa and the Qinghai-Tibet Plateau in China.

When the weather warms up, this permafrost melts, and we call it seasonal permafrost.

In some places, there is a type of permafrost that can last for many years, and that is permafrost. For example, in the Arctic or the Tibetan Plateau, where temperatures are below zero all year round, the permafrost will remain perennial, and even in warmer years, it will only melt a small layer on the surface.

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We're glad to answer your questions! The difference between permafrost and seasonal permafrost is that permafrost is a layer of soil or loose rock that is temporarily frozen and soon thawed due to weather changes. Seasonally permafrost, which refers to soil or loose rock layers that freeze in winter and thaw in spring.

The depth of the permafrost is determined by factors such as natural geographical conditions and the physical properties of the soil. Permafrost, also known as "permafrost", refers to soil and loose rocks that remain frozen continuously for many years. Extended dataSeasonal frozen layers are distributed in non-permafrost areas, in vast areas south of the southern boundary of permafrost (northern hemisphere) or below the lower boundary (vertical zone), and in thawing zones of permafrost.

It has obvious latitude and vertical zone, generally speaking, with the increase of latitude and altitude, its thickness increases. 2 meters thickened to. 0 meters.

In the Northern Hemisphere, from mid-to-late October to December, the seasonal freeze layer appears from north to south, and gradually disappears from south to north from late February to early June. Seasonal permafrost is distributed in all provinces and regions north of the Yangtze River in China, and its area accounts for about 54 of China's territory. The seasonal thaw layer is distributed in the permafrost area, underlain by the permafrost layer.

From the southern boundary of permafrost to the north or the lower boundary to the top, the seasonal thaw soil layer gradually thins. 0 meters reduced to. 2 meters.

In the Northern Hemisphere, seasonal melt layers begin to appear in early April, reaching their maximum melting depth by the end of September and early October. Hope mine can help you! <>