Yedoma

Yedoma
Name	Yedoma
Settlement type	Permafrost formation
Country	Russia, United States, Canada
Region	Siberia, Alaska, Yukon

Yedoma is a term for extensive ice-rich Pleistocene permafrost deposits concentrated in northeastern Siberia, Alaska, and Yukon that contain large amounts of organic carbon, ice wedges, and loess-derived silt. It has become central to discussions in paleoclimate, Arctic ecology, and global carbon-cycle research because of its sensitivity to thaw and potential to release greenhouse gases. Scientific attention spans glaciology, cryology, and Quaternary studies across institutions and field programs.

Definition and Distribution

Yedoma occurs across the East Siberian Arctic Shelf, Kolyma River basin, Lena River basin, Seward Peninsula, and parts of the Mackenzie Delta, with notable occurrences near Verkhoyansk, Yakutia, Chukotka, Barrow, and Old Crow. Researchers from the Russian Academy of Sciences, the University of Alaska Fairbanks, the Geological Survey of Canada, the Alfred Wegener Institute, and the National Aeronautics and Space Administration map Yedoma extent using satellite data from Landsat, Sentinel, and MODIS and compare it to permafrost maps produced by the International Permafrost Association, the Intergovernmental Panel on Climate Change, and the Arctic Council. Occurrence is often referenced alongside loess deposits in the East European Plain, Siberian Lowlands, and Beringia during studies coordinated with institutions such as the Smithsonian Institution and the Natural History Museum, London.

Formation and Geological Characteristics

Yedoma formed during Marine Isotope Stages 2 and 3 under cold, arid conditions that favored accumulation of windblown loess, syngenetic ice wedge growth, and preservation of Pleistocene fauna. Stratigraphic studies link Yedoma to glacial-interglacial cycles examined in cores from the Laptev Sea, East Siberian Sea, and Chukchi Sea and to chronostratigraphy frameworks developed using radiocarbon dating laboratories at the Max Planck Institute for Chemistry, the University of Cambridge, and the University of Groningen. Grain-size analysis, optically stimulated luminescence dating, and stable-isotope work by teams at the University of Copenhagen, Columbia University, and Oregon State University clarify its cryostructure and ice fraction relative to Cryosol profiles described by the Food and Agriculture Organization and permafrost technicians working with the United States Geological Survey and Rosneft during resource assessments.

Permafrost Carbon and Climate Feedbacks

Yedoma contains large stocks of organic carbon comparable to continental-scale pools estimated by the Global Carbon Project, and its thaw is modeled in Earth system simulations run by the Met Office Hadley Centre, NASA GISS, and the Potsdam Institute for Climate Impact Research. Thaw-driven processes produce carbon dioxide and methane measured by flux towers managed by the FLUXNET community, and isotopic fingerprinting teams at ETH Zurich, the Jet Propulsion Laboratory, and the Scripps Institution of Oceanography separate microbial pathways. Scenarios evaluated by the Coupled Model Intercomparison Project and the Arctic Monitoring and Assessment Programme indicate permafrost-carbon feedbacks could influence targets discussed at United Nations Framework Convention on Climate Change conferences and in assessments by the Intergovernmental Panel on Climate Change.

Ecology and Hydrology

Yedoma landscapes host tundra vegetation communities characterized in surveys by the Alaska Botanical Garden, the Komarov Botanical Institute, and the Canadian Museum of Nature, with species lists compared to herbarium collections at Kew Gardens, the Missouri Botanical Garden, and the Field Museum. Thermokarst lakes and alas depressions that develop following thaw alter hydrology monitored by the European Space Agency, the Norwegian Polar Institute, and the University of Lapland, affecting migratory routes used by species tracked by BirdLife International, the World Wide Fund for Nature, and the Audubon Society. Peatland interactions and boreal-adjacent transitions are studied in collaboration with the University of Helsinki, McGill University, and the University of Tokyo to assess impacts on communities documented by Greenpeace and the Indigenous Peoples' organizations such as the Inuit Circumpolar Council and the Gwich'in Tribal Council.

Paleoclimate and Archaeological Significance

Yedoma preserves Pleistocene plant material, megafauna remains, and DNA exploited in paleoclimate reconstructions by teams at the Natural History Museum, London, the Max Planck Institute for Evolutionary Anthropology, and the Russian Geographical Society. Permafrost archives inform calibrations for ice-core datasets from Greenland and Antarctica by linking to research at the Danish Meteorological Institute, the British Antarctic Survey, and the Alfred Wegener Institute. Archaeological finds associated with Paleolithic assemblages have been reported near sites investigated by scholars at the Institute of Archaeology and Ethnography, Russian Academy of Sciences, the Smithsonian Institution, and the University of Alaska Museum, contributing to debates involving the Peopling of the Americas and Beringian refugia.

Human Impact and Resource Use

Yedoma regions intersect with infrastructure, extractive-industry projects, and Indigenous lands involving companies such as Gazprom, Rosneft, BP, and ConocoPhillips and regulators like the Russian Federation ministries and the Alaska Department of Natural Resources. Thaw-induced ground instability challenges pipelines, airstrips, and settlements monitored by the Arctic Council's Emergency Prevention, Preparedness and Response program and studied by engineering groups at the Massachusetts Institute of Technology, the Norwegian University of Science and Technology, and the Technical University of Denmark. Subsistence hunting, reindeer herding, and cultural heritage concerns are raised by organizations including the Sámi Council, the Inuit Tapiriit Kanatami, and regional administrations.

Conservation, Monitoring, and Research Methods

Long-term monitoring of Yedoma uses permafrost observatories coordinated by the Global Terrestrial Network for Permafrost, airborne campaigns by NASA and the European Space Agency, and ground campaigns by the Institute of Arctic and Alpine Research, the University of Alaska Fairbanks, and the Alfred Wegener Institute. Techniques include borehole temperature logging, ground-penetrating radar, unmanned aerial systems operated by research groups at Stanford University, cryostratigraphic description protocols from the International Union for Quaternary Research, and biochemical analyses in laboratories at the Woods Hole Oceanographic Institution, the University of Leeds, and the University of British Columbia. Collaborative programs such as PAGE21, PAGES, and the International Arctic Science Committee coordinate datasets shared with policy bodies including the Arctic Council, the European Commission, and the United Nations Environment Programme.

Category:Permafrost Category:Quaternary geology Category:Arctic science