Results 31 to 40 of about 12,423 (209)

Thawing permafrost poses environmental threat to thousands of sites with legacy industrial contamination

open access: yesNature Communications, 2023
Thousands of industrial sites were found to be correlated with contaminated sites in the Arctic. Between 13,000 and 20,000 contaminated sites are likely to exist in the permafrost region, 26% of which will be affected by permafrost thaw before 2100.
Moritz Langer   +9 more
doaj   +1 more source

The influence of particle morphology on the long-term strength of sandy soil under freeze-thaw cycles

open access: yesCase Studies in Construction Materials, 2023
Freeze-thaw weathering can fragment sand and gravel materials, altering their mechanical properties. This study aims to simulate the effects of freeze-thaw weathering by subjecting sand and gravel materials to cycling tests.
Qi Liu   +7 more
doaj   +1 more source

Ecological and geochemical characteristics of the snow cover in the Yakutsk city (Central Siberia)

open access: yesЛëд и снег, 2021
For the first time, the geochemistry of snow cover on the territory of the city of Yakutsk, the largest city located in the permafrost zone, is considered on the basis of recent methods of analysis. To study the chemical composition of the snow cover and
V. N. Makarov, N. V. Torgovkin
doaj   +1 more source

Heavy and Light Mineral Association of Late Quaternary Permafrost Deposits in Northeastern Siberia

open access: yesFrontiers in Earth Science, 2022
We studied heavy and light mineral associations from two grain-size fractions (63–125 μm, 125–250 µm) from 18 permafrost sites in the northern Siberian Arctic in order to differentiate local versus regional source areas of permafrost aggradation on the ...
L. Schirrmeister   +7 more
doaj   +1 more source

Imaging permafrost [PDF]

open access: yesProceedings of the National Academy of Sciences, 2013
Last October, when Susan Hubbard and her team pulled sleds full of sensitive sensors across the snow near the northernmost point in Alaska, temperatures hovered in the single digits and low teens (e.g., 8–15 °F). Foremost in the researchers’ minds, aside from collecting data on the frozen ground beneath their feet, were two things: keep an eye out for ...
openaire   +2 more sources

Measurement of Excess Pore-Water Pressure in Frozen Soil at Subfreezing Temperatures Close to 0°C

open access: yesGeofluids, 2022
Response of pore-water pressure has crucial effect on the engineering geological performance of permafrost ground. However, there is a dearth of literature on the measurement of pore-water pressure in frozen soils due to challenges with regard to ...
Hu Zhang   +3 more
doaj   +1 more source

The Monterey Event and the Paleocene‐Eocene Thermal Maximum

open access: yesGeophysical Monograph Series, Page 401-416., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Tali L. Babila, Gavin L. Foster
wiley  

+2 more sources

Late Summer Water Sources in Rivers and Lakes of the Upper Yana River Basin, Northern Eurasia, Inferred from Hydrological Tracer Data

open access: yesHydrology, 2022
Major ions, stable isotopes, and trace elements, including rare earth elements (REEs), are used as natural tracers in the qualitative assessment of potential water sources in lakes and rivers of the upper Yana River basin, between Verkhoyansk and Chersky
Nikita Tananaev
doaj   +1 more source

Construction on Permafrost

open access: yesCanadian Geotechnical Journal, 1971
Permafrost, or perennially frozen ground, occurs widely throughout the northern half of Canada. Experience has shown that special design and construction techniques are required for building on permafrost in order to avoid disturbing the delicate thermal balance that preserves the frozen ground.
Crawford, C. B., Johnston, G. H.
openaire   +3 more sources

Relationships between greenhouse gas production and landscape position during short-term permafrost thaw under anaerobic conditions in the Lena Delta [PDF]

open access: yesBiogeosciences, 2023
Soils in the permafrost region have acted as carbon sinks for thousands of years. As a result of global warming, permafrost soils are thawing and will potentially release greenhouse gases (GHGs) such as methane (CH4) and carbon dioxide (CO2).
M. Laurent   +6 more
doaj   +1 more source

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