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They are soils of very cold climates which are defined as containing permafrost within two meters (6 ft 7 in) of the soil surface. The word "Gelisol" comes from the Latin gelare meaning "to freeze", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic of Gelisols.
USDA soil taxonomy (ST) developed by ... Gelisol – permafrost soils with permafrost within two metres of the surface or gelic materials and permafrost within one ...
Gelisol (permafrost soil) Horizons: A, sometimes By, & C Soils with ground ice or other permafrost features within one meter of the surface. In paleosols, locations ...
Cut-away section of soil, showing movement of soil layers due to cryoturbation. In gelisols (permafrost soils), cryoturbation (frost churning) refers to the mixing of materials from various horizons of the soil down to the bedrock due to freezing and thawing. Cryoturbation occurs to varying degrees in most gelisols.
Permafrost temperature profile. Permafrost occupies the middle zone, with the active layer above it, while geothermal activity keeps the lowest layer above freezing. The vertical 0 °C or 32 °F line denotes the average annual temperature that is crucial for the upper and lower limit of the permafrost zone, while the red lines represent seasonal temperature changes and seasonal temperature ...
Entisols, which exhibit little soil profile development, are characteristic of areas where soil parent materials have quite recently been deposited, e.g. on recent river alluvium. In the US, Gelisols occur only in parts of Alaska; they are characterized by having permafrost within 100 cm of the surface.
About 19,000 people had to flee the city, which is in an area with discontinuous permafrost. Temperature records are organized by Arctic water year, so the most recent one ran from October 2023 ...
Cryopedology is any study relating to soils at temperatures below 0 degrees Celsius, with a focus on intensive frost action and permanently frozen ground, permafrost, or perennially frozen ground, pergelisol. [1] This includes their formation, decay, causes, occurrences, and engineering practices used to overcome difficulties from such frost ...