Results 11 to 20 of about 1,205 (177)

Nitrogen Redox Controls on Greenhouse Gas Production in Yedoma Taliks [PDF]

Global Change Biology
ABSTRACT Large carbon and nitrogen pools are disproportionately concentrated in the icy, Pleistocene‐aged silt deposits of Arctic Yedoma permafrost. Upon thaw, these undergo microbial mineralization, releasing greenhouse gases (GHGs) including carbon dioxide (CO 2 ), methane
Orit Sivan, Katey M. Walter Anthony
exaly   +4 more sources

Thawing Yedoma permafrost is a neglected nitrous oxide source [PDF]

Nature Communications, 2021
Abstract In contrast to the well-recognized permafrost carbon (C) feedback to climate change, the fate of permafrost nitrogen (N) after thaw is poorly understood. According to mounting evidence, part of the N liberated from permafrost may be released to the atmosphere as the strong greenhouse gas (GHG) nitrous ...
M. E. Marushchak, J. Kerttula, K. Diáková, A. Faguet, J. Gil, G. Grosse, C. Knoblauch, N. Lashchinskiy, P. J. Martikainen, A. Morgenstern, M. Nykamb, J. G. Ronkainen, H. M. P. Siljanen, L. van Delden, C. Voigt, N. Zimov, S. Zimov, C. Biasi   +17 more
europepmc   +6 more sources

Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw [PDF]

Environmental Research Letters, 2013
Pleistocene Yedoma permafrost contains nearly a third of all organic matter (OM) stored in circum-arctic permafrost and is characterized by the presence of massive ice wedges.
J E Vonk, P J Mann, K L Dowdy, A Davydova, S P Davydov, N Zimov, R G M Spencer, E B Bulygina, T I Eglinton, R M Holmes   +9 more
doaj   +4 more sources

The genesis of Yedoma Ice Complex permafrost – grain-size endmember modeling analysis from Siberia and Alaska [PDF]

Eiszeitalter und Gegenwart, 2020
The late Pleistocene Yedoma Ice Complex is an ice-rich and organic-bearing type of permafrost deposit widely distributed across Beringia and is assumed to be especially prone to deep degradation with warming temperature, which is a potential tipping ...
L. Schirrmeister, E. Dietze, E. Dietze, H. Matthes, G. Grosse, G. Grosse, J. Strauss, S. Laboor, M. Ulrich, F. Kienast, S. Wetterich   +10 more
doaj   +3 more sources

Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu²⁺ and Ni²⁺ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean [PDF]

Toxics, 2023
Pollution of the Arctic Ocean by potentially toxic elements (PTEs) is a current environmental problem. Humic acids (HAs) play an important role in the regulation of PTE mobility in soil and water.
Nikita A. Sobolev, Konstantin S. Larionov, Darya S. Mryasova, Anna N. Khreptugova, Alexander B. Volikov, Andrey I. Konstantinov, Dmitry S. Volkov, Irina V. Perminova   +7 more
doaj   +2 more sources

Yedoma Ice Complex of the Buor Khaya Peninsula (southern Laptev Sea) [PDF]

Biogeosciences, 2017
The composition of perennially frozen deposits holds information on the palaeo-environment during and following deposition. In this study, we investigate late Pleistocene permafrost at the western coast of the Buor Khaya Peninsula in the south-central ...
L. Schirrmeister, G. Schwamborn, P. P. Overduin, J. Strauss, M. C. Fuchs, M. Grigoriev, I. Yakshina, J. Rethemeyer, E. Dietze, S. Wetterich   +9 more
doaj   +6 more sources

Future projection of greenhouse gas emissions due to permafrost degradation using a simple numerical scheme with a global land surface model [PDF]

Progress in Earth and Planetary Science, 2020
The Yedoma layer, a permafrost layer containing a massive amount of underground ice in the Arctic regions, is reported to be rapidly thawing. In this study, we develop the Permafrost Degradation and Greenhouse gasses Emission Model (PDGEM), which ...
Tokuta Yokohata, Kazuyuki Saito, Akihiko Ito, Hiroshi Ohno, Katsumasa Tanaka, Tomohiro Hajima, Go Iwahana   +6 more
doaj   +2 more sources

Geomorphology and InSAR-Tracked Surface Displacements in an Ice-Rich Yedoma Landscape

Frontiers in Earth Science, 2021
Ice-ridge Yedoma terrain is susceptible to vertical surface displacements by thaw and refreeze of ground ice, and geomorphological processes of mass wasting, erosion and sedimentation.
Albertus Johannes Dolman
exaly   +3 more sources

Thaw Subsidence of a Yedoma Landscape in Northern Siberia, Measured In Situ and Estimated from TerraSAR-X Interferometry

Remote Sensing, 2018
In permafrost areas, seasonal freeze-thaw cycles result in upward and downward movements of the ground. For some permafrost areas, long-term downward movements were reported during the last decade.
Niko Bornemann, Henriette Sudhaus, Simon Zwieback   +2 more
exaly   +3 more sources

Saline Permafrost and Cryopegs as Potentially Important Sources of CO2—Assessing Organic Carbon Mineralization Potentials on the Alaskan Coastal Plain [PDF]

Global Change Biology, Volume 32, Issue 7, July 2026.
Incubation experiments reveal that potentially carbon‐rich saline permafrost and cryopegs from Arctic coastal plains exhibit CO2 production potentials comparable to active layers. This could substantially shift greenhouse gas balances, as salinity is currently not accounted for in permafrost carbon assessments.
Fabian Seemann, Mackenzie R. Baysinger, Susanne Liebner, Claire Treat, Michael Zech, Maren Jenrich, Guido Grosse, Benjamin M. Jones, Jens Strauss   +8 more
wiley   +2 more sources