Permafrost permanently frozen soils that occur in polar regions and in the mountains.
In permafrost regions, the soil is permanently frozen at least for two consequtive years. Only in the summer the permafrost thaws at the surfaces (about half a meter of depth). Huge amounts of organic carbon is stored in the permafrost. Glaciers are also permafrost area, like at the Zugspitze (2,962 m eastern Alps, Bavaria) in Germany.