Permafrost is a permanently frozen layer below earth’s surface. It consists of soil, gravel, and sand, usually bound together by ice. 5 – 12+
What Is a Permanent Layer of Ice Under the Soil?
A permafrost is a layer of soil, sediment, or rock that is permanently frozen. Permafrost forms in areas where the temperature remains below freezing for two or more years.
The upper layer of permafrost is frozen ground, while the lower layer is a mixture of frozen sediment and ice. Permafrost occurs in high latitude areas, such as the Arctic and Antarctic regions.
It also occurs at high altitudes, such as on mountaintops. Permafrost can also form in areas that are not very cold, if the ground is not well–drained. For example, permafrost can form under a layer of peat in a wetland.
Permafrost is an important part of the global climate system. It affects the global water cycle and the exchange of greenhouse gases between the atmosphere and the ground.
Permafrost also affects the way people live and work in cold regions. Permafrost is vulnerable to climate change. As the climate warms, permafrost thaws.
This can cause the ground to collapse, damage buildings and infrastructure, and release greenhouse gases into the atmosphere. What is permafrost? Permafrost is a layer