Results 71 to 80 of about 248,447 (203)

Modeled Subsidence of Permafrost Terrain 2025–2050: North‐Central Alaska

Permafrost and Periglacial Processes, Volume 37, Issue 4, Page 692-712, October/December 2026.
ABSTRACT A large fraction of the Alaska terrain is underlain by regolith that contains excess ice (ice that in volume exceeds the natural pore space). Possible loss of excess ice would lead to ground subsidence, which in turn would disturb and destabilize the ground surface.
Jaakko Putkonen, Hayden Patterson, Robert Chance, Mary Soaper, Anai Caparó Bellido, Aymane Ahajjam, Andrew Wilcox, Sheridan Parker, Timothy Pasch   +8 more
wiley   +1 more source

Thermokarst lakes increased atmospheric methane levels [PDF]

Eos, Transactions American Geophysical Union, 2012
Ice cores taken from Greenland indicate that during the last deglaciation, approximately 10,000 years ago, increases in temperature occurred at the same times as increases in atmospheric methane, a potent greenhouse gas. The source of the increase in atmospheric methane is still debated, but it has been suggested that thermokarst lakes, which form from
openaire   +1 more source

Internal Structure, Kinematics, and Prehistory of Frozen Debris Lobe‐A (FDL‐A), Brooks Range, Alaska

Permafrost and Periglacial Processes, Volume 37, Issue 4, Page 645-667, October/December 2026.
ABSTRACT Frozen Debris Lobe‐A (FDL‐A)—one of hundreds of FDLs in the Brooks Range of northern Alaska—is a slow‐moving landslide in permafrost that has been the subject of research since 2008 due to its close proximity to the Dalton Highway. Here, we synthesize more than a decade's worth of climate and surface measurements of monitored FDLs, and the ...
Margaret M. Darrow, Esther L. Babcock, Ben A. Leshchinsky   +2 more
wiley   +1 more source

The evolution of the ecosystems of thermokarst lakes of the Bolshezemelskaya tundra in the context of climate change [PDF]

E3S Web of Conferences, 2019
In the conditions of climate warming, the thawing of permafrost can provoke the formation of new thermokarst lakes and subsidence, which facilitates the removal of organic matter from thawed peat into natural waters.
Shirokova Liudmila, Ivanova Irina, Manasypov Rinat, Pokrovsky Oleg, Chupakov Artem, Iglovsky Stanislav, Shorina Natalia, Zabelina Svetlana, Gofarov Mikhail, Payandi-Rolland Dahedrey, Chupakova Anna, Moreva Olga   +11 more
doaj   +1 more source

Depositional and Hydrological Relationships Between Buried Dead Ice and the Active Layer in the McMurdo Dry Valleys, Antarctica: A Study of Sediment Geochemistry and Cation Concentrations

Permafrost and Periglacial Processes, Volume 37, Issue 4, Page 725-752, October/December 2026.
ABSTRACT The McMurdo Dry Valleys, the largest ice‐free region in Antarctica, are home to a cold‐desert hydrologic system of glaciers, snowbanks, streams, and lakes. Freshwater is also stored as dead glacial ice, which is poorly constrained in terms of ion concentrations and interactions with both in situ and overlying sediments.
Matthew C. Witscheber, Kate M. Swanger
wiley   +1 more source

Organic carbon content in degrading permafrost beneath expanding thermokarst lakes

, 2014
Arctic lakes are globally significant sources of methane, resulting from anaerobic decomposition of thawed organic matter in lake bottoms. We examined patterns of permafrost degradation near thermokarst lakeshores in the tundra of Old Crow Flats, a 5600 ...
Pascale Roy-léveillée (580099)
core   +1 more source

Studying the distribution of thermokarst lakes areas in arctic zone of Western Siberia and their dynamics by the ultrahigh resolution satellite images

Известия Томского политехнического университета: Инжиниринг георесурсов, 2016
The relevance of the paper is caused by insufficiently studied regularities of distribution of sizes and dynamics of thermokarst lakes, considered as the most active sources of methane emissions to the atmosphere in the Arctic regions under global ...
Natalia Anatolievna Bryksina, Yury Mikhailovich Polishchuk   +1 more
doaj   +2 more sources

Quantifying the Surface Deformation of Pingos on the Alaskan North Slope Using Interferometric Synthetic Aperture Radar (InSAR)

Permafrost and Periglacial Processes, Volume 37, Issue 4, Page 682-691, October/December 2026.
ABSTRACT Pingos are large mounds with cores formed of intrusive ice that form in periglacial landscapes. These ice structures can form in regions of discontinuous permafrost, commonly as hydraulic or open‐system pingos, or in locations of continuous permafrost, commonly as hydrostatic or closed‐system pingos.
Venezia M. Follingstad, Roger J. Michaelides, Matthew R. Siegfried, Tyler M. Meng, John Bradford, Kynan H. G. Hughson, Alexia R. Kubas, Andrew Mullen, Enrica Quartini, Austin Routt, Hanna G. Sizemore, Andrei Swidinsky, Britney E. Schmidt   +12 more
wiley   +1 more source

Facies analysis of yedoma thermokarst lakes on the northern Seward Peninsula, Alaska [PDF]

, 2016
Thermokarst lakes develop as a result of the thaw and collapse of ice-rich, permanently frozen ground (permafrost). Of particular sedimentological importance are thermokarst lakes forming in late Pleistocene icy silt (yedoma), which dramatically alter ...
Louise Farquharson, Farquharson, Louise, Katey Walter Anthony, Mary Edwards, Bigelow, Nancy, Edwards, Mary, Nancy Bigelow, Guido Grosse, Anthony, Katey Walter, Grosse, Guido   +9 more
core   +1 more source

RISK ASSESSMENT BASED ON MATHEMATICAL MORPHOLOGY OF LANDSCAPE MODELS (CASE STUDY OF THERMOKARST PLAINS)

Geography, Environment, Sustainability, 2013
The paper presents a new approach for risk assessment of impact of thermokarst processes on engineering structures; it is based on the methods of mathematical morphology of landscape.
Alexey Victorov, Veronika Kapralova
doaj   +1 more source