Results 41 to 50 of about 973,278 (223)

Ground ice, organic carbon and soluble cations in tundra permafrost soils and sediments near a Laurentide ice divide in the Slave Geological Province, Northwest Territories, Canada [PDF]

The Cryosphere, 2020
The central Slave Geological Province is situated 450–650 km from the presumed spreading centre of the Keewatin Dome of the Laurentide Ice Sheet, and it differs from the western Canadian Arctic, where recent thaw-induced landscape changes in ...
R. Subedi, S. V. Kokelj, S. V. Kokelj, S. Gruber   +3 more
doaj   +1 more source

Assessment of Spatio-Temporal Landscape Changes from VHR Images in Three Different Permafrost Areas in the Western Russian Arctic

Remote Sensing, 2020
Our study highlights the usefulness of very high resolution (VHR) images to detect various types of disturbances over permafrost areas using three example regions in different permafrost zones.
F. Ardelean, A. Onaca, M. Cheţan, A. Dornik, G. Georgievski, S. Hagemann, Fabian Timofte, Oana Berzescu   +7 more
semanticscholar   +1 more source

Rapid Saline Permafrost Thaw Below a Shallow Thermokarst Lake in Arctic Alaska

Geophysical Research Letters, 2023
Permafrost warming and degradation is well documented across the Arctic. However, observation‐ and model‐based studies typically consider thaw to occur at 0°C, neglecting the widespread occurrence of saline permafrost in coastal plain regions.
Benjamin M. Jones, Mikhail Z. Kanevskiy, Andrew D. Parsekian, Helena Bergstedt, Melissa K. Ward Jones, Rodrigo C. Rangel, Kenneth M. Hinkel, Yuri Shur   +7 more
doaj   +1 more source

Major and trace elements in suspended matter of western Siberian rivers: First assessment across permafrost zones and landscape parameters of watersheds

, 2020
In contrast to good understanding of chemical composition of the river suspended matter (RSM) of large rivers, small rivers remain strongly understudied, despite the fact that they can provide valuable information on mechanisms of RSM generation and ...
I. Krickov, A. Lim, R. Manasypov, S. Loiko, S. Vorobyev, V. Shevchenko, O. Dara, V. Gordeev, O. Pokrovsky   +8 more
semanticscholar   +1 more source

Spatial controls of methane uptake in upland soils across climatic and geological regions in Greenland

Communications Earth & Environment, 2023
In the Arctic, the spatiotemporal variation of net methane uptake in upland soils depends on unresolved interactive controls between edaphic and microbial factors not yet included in current models, underpinning the uncertainty of upscaling the Arctic ...
Ludovica D’Imperio, Bing-Bing Li, James M. Tiedje, Youmi Oh, Jesper Riis Christiansen, Sebastian Kepfer-Rojas, Andreas Westergaard-Nielsen, Kristian Koefoed Brandt, Peter E. Holm, Peiyan Wang, Per Ambus, Bo Elberling   +11 more
doaj   +1 more source

Geoinformation modeling of permafrost landscapes of North-Eastern Siberia

, 2022
The landscape-indicative approach makes it possible to determine permafrost landscapes based on the identification of two physiognomic indicators-variables of relief and vegetation, as well as stratigraphic-genetic sediment complexes. For permafrost characteristics of landscapes, multilevel combinations of environmental variables (criteria) for ...
Zakharov, Moisei, Gadal, Sébastien, Danilov, Yuri   +2 more
openaire   +2 more sources

Permafrost and lakes control river isotope composition across a boreal Arctic transect in the Western Siberian lowlands

Environmental Research Letters, 2018
The Western Siberian Lowlands (WSL) store large quantities of organic carbon that will be exposed and mobilized by the thawing of permafrost. The fate of mobilized carbon, however, is not well understood, partly because of inadequate knowledge of ...
P Ala-aho, C Soulsby, O S Pokrovsky, S N Kirpotin, J Karlsson, S Serikova, R Manasypov, A Lim, I Krickov, L G Kolesnichenko, H Laudon, D Tetzlaff   +11 more
doaj   +1 more source

Landscape fragmentation associated with the Qingzang Highway and its influencing factors—A comparison study on road sections and buffers

Geography and Sustainability, 2021
Many studies have examined the effect of roads on landscape fragmentation. Yet they rarely considered local characteristics of the road and road buffer widths.
Yi Miao, Teqi Dai, Xingdou Yang, Jinping Song   +3 more
doaj   +1 more source

The role of changing temperature in microbial metabolic processes during permafrost thaw.

PLoS ONE, 2020
Approximately one fourth of the Earth's Northern Hemisphere is underlain by permafrost, earth materials (soil, organic matter, or bedrock), that has been continuously frozen for at least two consecutive years.
Komi S Messan, Robert M Jones, Stacey J Doherty, Karen Foley, Thomas A Douglas, Robyn A Barbato   +5 more
doaj   +1 more source

Co-occurrence patterns in aquatic bacterial communities across changing permafrost landscapes [PDF]

Biogeosciences, 2015
Abstract. Permafrost thaw ponds and lakes are widespread across the northern landscape and may play a central role in global biogeochemical cycles, yet knowledge about their microbial ecology is limited. We sampled a set of thaw ponds and lakes as well as shallow rock-basin lakes that are located in distinct valleys along a North–South permafrost ...
J. Comte, C. Lovejoy, S. Crevecoeur, W. F. Vincent   +3 more
openaire   +3 more sources