# Yedoma > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Yedoma > Markdown URL: https://mediated.wiki/source/Yedoma.md > Source: https://en.wikipedia.org/wiki/Yedoma > Source revision: 1348112827 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{About|a type of permafrost soil|the rural localities in Russia|Yedoma (rural locality)}} {{Expand Finnish|topic=sci|date=March 2012}} '''Yedoma''' {{IPAc-en|ˈ|j|ɛ|d|ə|m|ə}} ({{langx|ru|е́дома}}) is an organic-rich (about 2% carbon by mass) [Pleistocene](/source/Pleistocene)-age [permafrost](/source/permafrost) with ice content of 50–90% by volume.{{cite journal |vauthors=Walter KM, Zimov SA, Chanton JP, Verbyla D, Chapin FS |title=Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming |journal=Nature |volume=443 |issue=7107 |pages=71–75 |date=September 2006 |pmid=16957728 |doi=10.1038/nature05040 |bibcode=2006Natur.443...71W |s2cid=4415304 }} Yedoma are abundant in the cold regions of eastern [Siberia](/source/Siberia), such as northern [Yakutia](/source/Sakha_Republic), as well as in [Alaska](/source/Alaska) and the [Yukon](/source/Yukon).{{cite journal| doi=10.1016/j.earscirev.2017.07.007 | volume=172 | title=Deep Yedoma permafrost: A synthesis of depositional characteristics and carbon vulnerability | year=2017 | journal=Earth-Science Reviews | pages=75–86 | vauthors=Strauss J, Schirrmeister L, Grosse G, Fortier D, Hugelius G, Knoblauch C, Romanovsky V, Schädel C, von Deimling S, Thomas, Schuur EA, Shmelev D, Ulrich M, Veremeeva A| bibcode=2017ESRv..172...75S | doi-access=free | hdl=21.11116/0000-0003-3BCF-3 | hdl-access=free }} ==Characteristics== [[Image:Поездка в Майю 03.06.2018 (03).jpg|thumb|''Alas'' landscape in [Megino-Kangalassky District](/source/Megino-Kangalassky_District), Yakutia]] The landscape of yedoma areas is of glacier plains and hills with shallow depressions known as [alas](/source/Alas_(geography)).S. V. Tomirdiaro, ''Evolution of lowland landspapes in Northeastern Asia during late Quaternary time.'' Yedoma usually form in [lowland](/source/lowland)s or stretches of land with rolling hills where ice wedge polygonal networks are present, in stable relief features with accumulation zones of poor drainage, severe cold and arid [continental climate](/source/continental_climate) zones resulting in scanty vegetation cover, intense [periglacial](/source/periglacial) weathering processes, as well as the proximity of sediment sources, such as low mountain ranges and foothills. The amount of [carbon](/source/carbon) trapped in this type of permafrost is much more prevalent than originally thought and may be about 210 to 500 [Gt](/source/Gigatonne),Zimov SA, Schuur EAG, Chapin III SF. 2006. Permafrost and the Global Carbon Budget. Science 312(16),1612-1613. that is a multiple of the amount of carbon released into the air each year by the burning of [fossil fuel](/source/fossil_fuel)s.{{cite news |author=Seth Borenstein |title=Scientists Find New Global Warming "Time Bomb" |agency=[Associated Press](/source/Associated_Press) |date=7 September 2006 |url=http://www.thewe.cc/weplanet/news/arctic/permafrost_melting.htm |access-date=6 November 2007 |archive-date=25 July 2018 |archive-url=https://web.archive.org/web/20180725221326/http://www.thewe.cc/weplanet/news/arctic/permafrost_melting.htm |url-status=dead }} Thawing yedoma is a significant source of [atmospheric methane](/source/atmospheric_methane) (about 4 [Tg](/source/Megatonne) of {{chem|CH|4}} per year). The Yedoma region currently occupies an area of more than one million square kilometers from northeast Siberia to Alaska and [Canada](/source/Canada), and in many regions is tens of meters thick. During the [Last Glacial Maximum](/source/Last_Glacial_Maximum), when the global sea level was 120 m lower than that of today, similar deposits covered substantial areas of the exposed northeast Eurasian continental shelves. At the end of the last [ice age](/source/ice_age), at the [Pleistocene](/source/Pleistocene)–[Holocene](/source/Holocene) transition, thawing yedoma and the resulting [thermokarst](/source/thermokarst) lakes may have produced 33 to 87% of the high-latitude increase in atmospheric [methane](/source/methane) concentration.{{cite journal |vauthors=Walter KM, Edwards ME, Grosse G, Zimov SA, Chapin FS |title=Thermokarst lakes as a source of atmospheric {{chem|CH|4}} during the last deglaciation |journal=Science |volume=318 |issue=5850 |pages=633–6 | date=October 2007 |pmid=17962561 |doi=10.1126/science.1142924 |bibcode=2007Sci...318..633W |s2cid=31630756 }} ==See also== {{Portal|Siberia}} * [Alas (geography)](/source/Alas_(geography)) * [Baydzharakh](/source/Baydzharakh) ==References== {{Reflist}} ==Further reading== *Frederick West (1996), ''American Beginnings'' The University of Chicago Press, {{ISBN|0-226-89399-5}}, p52 *Velichko 1984, p141, Chapter 15, Tomirdiaro: Periglacial Landscapes and loessa Accumulation in the late pleistocene arctic and subarctic *K. M. Walter, S. A. Zimov, J. P. Chanton, D. Verbyla & F. S. Chapin III, "Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming", Nature, 443, 71-75, 2006 *[http://www.apex.geo.su.se/apex-updates-projects-2007/past-permafrost.html Lutz Schirrmeister, IPY, From the beginning of the Pliocene cooling to the modern warming] {{Webarchive|url=https://web.archive.org/web/20101220052812/http://www.apex.geo.su.se/apex-updates-projects-2007/past-permafrost.html |date=2010-12-20 }} – Past Permafrost Records in Arctic Siberia PAST PERMAFROST, Original IPY project no: ID 15,2011, APEX - Arctic Palaeoclimate and its EXtremes *Rutter&Velichko (1997) "Quaternary of northern eurasia: Late pleistocene and holocene landscapes, stratigraphy and environments, Nat W. Rutter, editor-in-chief, Guest editors A. A. Velichko et al., Vols 41/42 July/August 1997, {{ISSN|1040-6182}} *Late Quaternary environments of Soviet Union, A.A. Velichko, engl edition Wright&Narnosky, pp. 176–177, University of Minnesota Publ, Longman, London 1984, {{ISBN|0-582-30125-4}} *{{cite journal | doi = 10.1029/2002JD002559 | volume=108 | title=Climate change and Arctic ecosystems: 2. Modeling, paleodata-model comparisons, and future projections | year=2003 | journal=Journal of Geophysical Research | vauthors=Kaplan JO | issue=D19 | page=8171 | bibcode=2003JGRD..108.8171K | url=https://epic.awi.de/id/eprint/5990/1/Kap2003a.pdf | doi-access=free }} *{{cite journal | vauthors = Walter KM, Edwards ME, Grosse G, Zimov SA, Chapin II | year = 2007 | title = Thermokarst Lakes as a Source of Atmospheric CH4 During the Last Deglaciation | journal = Science | volume = 318 | issue = 5850| pages = 633–636 | doi = 10.1126/science.1142924 | pmid = 17962561 | bibcode = 2007Sci...318..633W | s2cid = 31630756 }} * Schirrmeister, L., Fedorov, A. N., Froese, D., Iwahana, G., Van Huissteden, K., Veremeeva, A., eds. (2022). Yedoma Permafrost Landscapes as Past Archives, Present and Future Change Areas. Lausanne: Frontiers Media SA. [doi:10.3389/978-2-88976-466-2](/source/doi%3A10.3389%2F978-2-88976-466-2) ==External links== *[https://www.researchgate.net/figure/Yedoma-landscape-at-the-western-Laptev-Sea-coastal-plain-in-front-of-the-Pronchishchev_fig1_285886561 Yedoma landscape at the western Laptev Sea coastal plain] {{Scholia|topic}} {{Permafrost}} {{Periglacial enviroment}}{{Soil type}} Category:Pedology Category:Types of soil Category:Permafrost {{Siberia-geo-stub}} --- Adapted from the Wikipedia article [Yedoma](https://en.wikipedia.org/wiki/Yedoma) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Yedoma?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.