Results 11 to 20 of about 7,617 (266)

New insights into the drainage of inundated ice-wedge polygons using fundamental hydrologic principles [PDF]

The Cryosphere, 2021
The pathways and timing of drainage from the inundated centers of ice-wedge polygons in a warming climate have important implications for carbon flushing, advective heat transport, and transitions from methane to carbon dioxide dominated emissions. Here,
D. R. Harp, D. R. Harp, V. Zlotnik, C. J. Abolt, B. Busey, S. T. Avendaño, B. D. Newman, A. L. Atchley, E. Jafarov, C. J. Wilson, K. E. Bennett   +10 more
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Climate Sensitivity of High Arctic Permafrost Terrain Demonstrated by Widespread Ice-Wedge Thermokarst on Banks Island

Remote Sensing, 2018
Ice-wedge networks underlie polygonal terrain and comprise the most widespread form of massive ground ice in continuous permafrost. Here, we show that climate-driven thaw of hilltop ice-wedge networks is rapidly transforming uplands across Banks Island ...
Robert H. Fraser, Steven V. Kokelj, Trevor C. Lantz, Morgan McFarlane-Winchester, Ian Olthof, Denis Lacelle   +5 more
doaj   +1 more source

Past climate and continentality inferred from ice wedges at Batagay megaslump in the Northern Hemisphere's most continental region, Yana Highlands, interior Yakutia [PDF]

Climate of the Past, 2019
Ice wedges in the Yana Highlands of interior Yakutia – the most continental region of the Northern Hemisphere – were investigated to elucidate changes in winter climate and continentality that have taken place since the Middle Pleistocene.
T. Opel, T. Opel, J. B. Murton, S. Wetterich, H. Meyer, K. Ashastina, F. Günther, F. Günther, F. Günther, H. Grotheer, G. Mollenhauer, P. P. Danilov, V. Boeskorov, G. N. Savvinov, L. Schirrmeister   +14 more
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Microbial and Geochemical Evidence of Permafrost Formation at Mamontova Gora and Syrdakh, Central Yakutia

Frontiers in Earth Science, 2021
Biotracers marking the geologic history and permafrost evolution in Central Yakutia, including Yedoma Ice Complex (IC) deposits, were identified in a multiproxy analysis of water chemistry, isotopic signatures, and microbial datasets.
M. Yu. Cherbunina, E. S. Karaevskaya, Yu. K. Vasil’chuk, N. I. Tananaev, D. G. Shmelev, N. A. Budantseva, A. Y. Merkel, A. L. Rakitin, A. V. Mardanov, A. V. Brouchkov, S. A. Bulat, S. A. Bulat   +11 more
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Active thermokarst regions contain rich sources of ice-nucleating particles [PDF]

Atmospheric Chemistry and Physics, 2023
Rapid Arctic climate warming, amplified relative to lower-latitude regions, has led to permafrost thaw and associated thermokarst processes. Recent work has shown permafrost is a rich source of ice-nucleating particles (INPs) that can initiate ice ...
K. R. Barry, T. C. J. Hill, M. Nieto-Caballero, T. A. Douglas, S. M. Kreidenweis, P. J. DeMott, J. M. Creamean   +6 more
doaj   +1 more source

Reconstruction of mean January air temperature of Holocene in the lower Kolyma River region

Лëд и снег, 2022
The object of study is ice wedges at 10 sites in the lower Kolyma River. The Holocene age of ice wedges is determined on the basis of radiocarbon dating of the enclosing sediments and location of ice wedges in alases, floodplains and lacustrine-paludal ...
N. A. Budantseva, Yu. K. Vasil’chuk
doaj   +1 more source

Heterogeneous ices in ice wedges structure on the Pur-Taz interfluve peatlands of the north of West Siberia

Лëд и снег, 2020
Structure of arctic peatlands with massive ice and structure-forming ice were studied in drained lake («khasyrey») of the Pur-Taz interfluves (the north of West Siberia). The period of accumulation of two-meter thickness of the peat was established to be
Ya. V. Tikhonravova, E. A. Slagoda, V. V. Rogov, V. I. Butakov, A. V. Lupachev, A. O. Kuznetsova, G. V. Simonova   +6 more
doaj   +1 more source

Damage law and mechanism of coal-rock joint structure induced by liquid nitrogen at low temperature

Scientific Reports, 2022
The width and degree of connectivity of coal-rock joints directly affect the seepage capacity of flow energy such as gas. To study the damage law and mechanism of the coal-rock joint structure under the action of liquid nitrogen, two methods of liquid ...
Hewan Li, Siyang Sun, Laigui Wang, Jian Liu, Ziheng Zhang   +4 more
doaj   +1 more source

A Quantitative Graph-Based Approach to Monitoring Ice-Wedge Trough Dynamics in Polygonal Permafrost Landscapes

Remote Sensing, 2021
In response to increasing Arctic temperatures, ice-rich permafrost landscapes are undergoing rapid changes. In permafrost lowlands, polygonal ice wedges are especially prone to degradation.
Tabea Rettelbach, Moritz Langer, Ingmar Nitze, Benjamin Jones, Veit Helm, Johann-Christoph Freytag, Guido Grosse   +6 more
doaj   +1 more source

Sea level fluctuations and their signature in the composition and structure of polygonal wedge ice in the Yenisei River lower reaches

Лëд и снег, 2015
Late Pleistocene and Holocene polygonal-wedge ice is studied in the lower course of the Yenisei River. Ice distribution, features of the formation, chemical and microbiological composition were determined.
O. L. Opokina, E. A. Slagoda, I. B. Tomberg, M. Yu. Suslova, A. D. Firsova, T. V. Khodzher, N. A. Zhuchenko   +6 more
doaj   +1 more source