# Talik

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Permanently-thawed zone amid a permafrost area

For other uses, see [Talik (disambiguation)](/source/Talik_(disambiguation)).

The three types of talik: closed, open and through.

A **talik** is a zone of year-round unfrozen [ground](/source/Soil) located in the middle of a [permafrost](/source/Permafrost) area. In regions of continuous permafrost, taliks often occur underneath shallow [thermokarst](/source/Thermokarst) lakes and rivers, where the deep water does not [freeze](/source/Freezing) in winter and thus the soil underneath does not freeze either. Sometimes closed, open, and through taliks are distinguished. These terms refer to whether the talik is surrounded by permafrost, open at the top (e.g. a thermokarst lake), or open both at the top and above an unfrozen layer beneath the permafrost.

## Supra-permafrost taliks

Due to climate fluctuations or changes, some permafrost regions may develop an unfrozen layer between the seasonal thawing and freezing surface layer and the permafrost. This layer is called a supra-permafrost ("above the permafrost") talik; it differs from traditional taliks, which are usually associated with water bodies, in that a supra-permafrost talik occurs because the ground that thaws in summer does not fully refreeze in winter. Calculations show that climate warming induces supra-permafrost taliks in moderately cold regions. In much colder regions, warming causes a deeper summer thaw without forming a talik layer, whereas in warm, shallow permafrost regions, permafrost quickly disappears. This type of talik has recently been observed in [Russia](/source/Russia). Over time and with continued increases in air temperature or snow depth, this talik layer becomes progressively thicker, and the deep permafrost layer eventually vanishes. Findings from a scientific study suggest a more widespread occurrence of open taliks within fault zones and areas influenced by large rivers.[1]

## See also

Wikimedia Commons has media related to [Taliks](https://commons.wikimedia.org/wiki/Category:Taliks).

- [Frost heaving](/source/Frost_heaving) – Upwards swelling of soil during freezing

- [Palsa](/source/Palsa) – Low frost heave in polar and subpolar climates

- [Pingo](/source/Pingo) – Mound of earth-covered ice

- [Gas emission crater](/source/Gas_emission_crater) – Crater formed by permafrost gas release

## References

1. **[^](#cite_ref-1)** Nicolsky, D.; Shakhova, N. (25 March 2010). ["Modeling sub-sea permafrost in the East Siberian Arctic Shelf: the Dmitry Laptev Strait"](https://doi.org/10.1088%2F1748-9326%2F5%2F1%2F015006). *Environmental Research Letters*. **5** (1) 015006. IOP Science. [Bibcode](/source/Bibcode_(identifier)):[2010ERL.....5a5006N](https://ui.adsabs.harvard.edu/abs/2010ERL.....5a5006N). [doi](/source/Doi_(identifier)):[10.1088/1748-9326/5/1/015006](https://doi.org/10.1088%2F1748-9326%2F5%2F1%2F015006).

v t e Periglacial environment Landforms Blockfield Bratschen Cryoplanation terrace Glacial erratic Kurum Lithalsa Paha Palsa Periglacial lake Pingo Protalus rampart Rock glacier Strandflat Glaciokarst Thermokarst Patterned ground Frost boil Polygons Solifluction lobes and sheets Sorted stripe Stone ring Processes Cryoplanation Cryosuction Cryoturbation Fluvio-thermal erosion Frost heave Frost weathering Gelifluction Ice segregation Methane release Nivation Solifluction Syngenetic permafrost growth Zero-curtain effect Soils and deposits Active layer Gelisols Ice wedge Loess Peat Permafrost Stratified slope deposit Talik Yedoma Biomes and ecotones Arctic tundra Arctic tree line Antarctic oasis Golets Antarctic tundra Montane grasslands and shrublands Alpine tundra Alpine tree line (Massenerhebung effect) Taiga (Drunken trees) Climate Alpine Polar Subpolar Category:Periglacial landforms Template:Glaciers

v t e Permafrost Overview Active layer Cryosphere Ice wedge Palsa Patterned ground Rock glacier Solifluction Types Periglacial lake Periglaciation Yedoma Landforms and processes Alas Baydzharakh Frost boil Frost heave Gelisol Ice wedge Lithalsa Paha Patterned ground Pingo Retrogressive thaw slump Syngenetic growth Talik Thermokarst Impact Arctic amplification Carbon cycle Climate feedback Drunken trees Methane emissions Pathogens Wildfires Construction Dempster Highway Qinghai–Tibet railway Trans-Alaska Pipeline Thaw Abrupt Antarctica Arctic Norway Russia Thaw depth Sites and case studies Batagaika crater Herschel Island Svalbard Yakutsk Yamal crater Extremophiles Alphapithovirus Carnobacterium pleistocenium Virgibacillus arcticus Explorers and scholars Oleg Anisimov Max C. Brewer Leonard Jaczewski Mikhail Kim Siemon Muller John Ross Mackay Susan M. Natali Matti Seppälä Mikhail Sumgin Karl Ernst von Baer Alexander von Middendorff Albert Lincoln Washburn Sergey Zimov Organizations and research Institutes Cold Regions Research and Engineering Laboratory International Arctic Research Center Melnikov Permafrost Institute National Snow and Ice Data Center Permafrost tunnel Woodwell Climate Research Center Associations and networks Circumpolar Active Layer Monitoring Global Terrestrial Network for Permafrost International Permafrost Association Permafrost Young Researchers Network Journals Permafrost and Periglacial Processes Theme parks Permafrost Kingdom Pleistocene Park Other Ice age species Related fields Archaeology Biogeography Climatology Ecology Environmental science Geochemistry Geology Geomorphology Geotechnical engineering Hydrogeology Hydrology Paleoclimatology Remote sensing Soil science Category

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Adapted from the Wikipedia article [Talik](https://en.wikipedia.org/wiki/Talik) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Talik?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.