What is Permafrost?
Permafrost is the soil that remains in or below freezing for two or more years. The term is actually a bit misleading because no frost is required. For example, permanently frozen subsoil can also be referred to as permafrost, as well as very dry frozen soils. Between 20-25% of the Earth's surface is covered with permafrost-known as cryotic soil-although this issue began to fluctuate wildly at the beginning of the 21st century due to global warming. Most of the time the soil in this state closely reflects the air temperature and is located in the polar regions of the world. Alpine Permafrost is found in mountain areas in lower width areas and other similar can be found spotted over the Earth's surface. In some cases, Permafrost is hundreds of thousands old, in which case it is considered to be "fossilized", accumulated for a period that lasted thousands of years and impossible to melt in the current climate conditions.
How do you have a manIt can introduce, cryotic soil has a radical impact on the regions where it is found. It inhibits the growth of plants, which makes it difficult to prosper. It also helps to withstand erosion, because essentially the whole land together and represents a number of challenges for people. The building on permafrost is complicated because if it melts, the structures can stand on its peak. Likewise, the utility pipes in areas with covering soil must be above the ground for safety, as they could melt the soil and cause a problem or could open if the soil melts and the ground settles.
scientists are particularly interested in the areas of "continuous permafrost", where the covering soil is extensive and has been present for a longer period of time. This often creates distinctive patterns in the ground that can be of interest to observe and the spread or reducing soil can be an indicator of environmental problems. For example, in the Arctic countries, the decreasing permafrost line has significantly contributed to erosion.
Permafrost regions of the world are also fromEmpering for archaeologists and historians. Frost is an excellent preservative, literally chilling artifacts over time. In addition to finding the remains of human and animals in cryotic soil, scientists have also found organic materials such as textiles, leather and baskets that would usually disintegrate.