Results 71 to 80 of about 1,094,470 (270)

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

Permafrost and Periglacial Processes, EarlyView.
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

Climate and Permafrost Shifts in Yakutia’s Arctic and Subarctic from 1965 to 2023

Land
By analyzing the last 50–60 years of climate changes in Arctic and Subarctic Yakutia, we have identified three distinct periods of climate development.
Alexander N. Fedorov, Pavel Y. Konstantinov, Nikolay F. Vasilyev, Stepan P. Varlamov, Yuri B. Skachkov, Alexey N. Gorokhov, Svetlana V. Kalinicheva, Rosaliya N. Ivanova, Alexandra N. Petrova, Varvara V. Andreeva, Varvara A. Novopriezzhaya, Maxim A. Sivtsev, Mikhail N. Zheleznyak   +12 more
doaj   +1 more source

Frozen Ground - The News Bulletin of the International Permafrost Association, No.33 [PDF]

, 2009
Frozen Ground - The News Bulletin of the International Permafrost Association, No ...
International Permafrost Association, IPA
core  

Evaluating Testability of Permafrost Models Through Physical and Thermal Testing in Complex Mountain Terrain, Yukon, Canada

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Due to its subsurface nature, permafrost cannot be directly observed with the naked eye or optical remote sensing. Consequently, accurately describing its distribution and thermal state is challenging. This is especially true in vast, remote environments, where obtaining comprehensive field data is demanding or improbable.
Ria Nicholson, Philip P. Bonnaventure, Nick C. Noad, Madeleine C. Garibaldi, Rabecca Thiessen, Will Kochtitzky   +5 more
wiley   +1 more source

Divergent Spatiotemporal Patterns and Climate Responses of Lateral and Internal Lake Drainage in the Northern Permafrost Region

Geophysical Research Letters
Lake drainage is a key manifestation of permafrost degradation with implications for hydrology, landscape dynamics and carbon feedbacks. Lake drainage occurs through two distinct mechanisms, namely lateral drainage and internal drainage.
Xiaolong Yang, Aobo Liu, Yating Chen
doaj   +1 more source

Modeling the spatiotemporal variability in subsurface thermal regimes across a low-relief polygonal tundra landscape [PDF]

The Cryosphere, 2016
Vast carbon stocks stored in permafrost soils of Arctic tundra are under risk of release to the atmosphere under warming climate scenarios. Ice-wedge polygons in the low-gradient polygonal tundra create a complex mosaic of microtopographic features ...
J. Kumar, N. Collier, G. Bisht, R. T. Mills, P. E. Thornton, C. M. Iversen, V. Romanovsky   +6 more
doaj   +1 more source

MAPPING OF PERMAFROST LANDSCAPES BASED ON THE ANALYSIS OF TERMAL IMAGES [PDF]

Proceedings of the International conference “InterCarto/InterGIS”, 2016
This paper presents the method of remote detection and mapping of permafrost landscapes. These natural complexes visually are significant not only on the terrain, but easily distinguished by thermal characteristics on surface temperature maps, obtained by processing data from Landsat TM and Terra ASTER.
openaire   +2 more sources

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

, 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.
Zimov, Nikita, Holmes, Robert, Dowdy, K. L., Davydov, S.P., Spencer, Robert G. M., Spencer, Robert, Eglinton, Timothy, Davydova, A., Dowdy, Kelsey, Mann, P. J., Bulygina, E.B., Zimov, N., Vonk, J. E.; id_orcid, Mann, P.J., Eglinton, Timothy I., Vonk, Jorien, Bulygina, Ekaterina, Spencer, Robert G M, Mann, Paul, Davydov, S. P., Bulygina, E. B., Davydov, Sergei P., Holmes, R.M., Spencer, R.G.M., Eglinton, T.I., Eglinton, T. I., Bulygina, Ekaterina B., Davydova, Anna, Holmes, R. Max, Davydov, Sergey, Dowdy, K.L., Holmes, Robert M., Spencer, R. G. M., Holmes, R. M., Vonk, J.E., Mann, Paul J., Vonk, J. E.   +36 more
core   +3 more sources

Repeated Pleistocene Permafrost Episodes in the Western Pannonian Basin

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Concerning the study of past periglacial processes, the Pannonian Basin is a key area as it contains the southernmost frost polygons found in Central Europe. The presence or absence of permafrost is still, however, a matter of debate, and data on the timing of frost action are also scarce.
Krisztina Sebe, Ágnes Novothny, Gergely Surányi, Barbara Varga, László Fodor, Gábor Csillag   +5 more
wiley   +1 more source

Icings and groundwater conditions in permafrost catchments of northwestern Canada

Scientific Reports, 2020
Icings are sheet-like masses of ice that form on the ground surface or in fluvial channels from groundwater seepage. Although the presence of icings in the landscape is known, few studies investigated their regional distribution and explored relations ...
Hugo Crites, Steve V. Kokelj, Denis Lacelle   +2 more
doaj   +1 more source