Results 11 to 20 of about 99,621 (296)
Are permafrost microorganisms as old as permafrost?
FEMS Microbiology Ecology, 2021 ABSTRACT Permafrost describes the condition of earth material (sand, ground, organic matter, etc.) cemented by ice when its temperature remains at or below 0°C continuously for longer than 2 years. Evidently, permafrost is as old as the time passed from freezing of the earth material.
Andrey Abramov +3 more
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Bioinformation, 2022 Thawing permafrost is a serious and worrisome threat to the environment, because it releases trapped heavy metals and greenhouse gasses. Thawing permafrost is also a health threat because, in addition to releasing these noxious gasses, thawing permafrost may free novel and undiscovered antibiotic-resistant bacteria, viruses, fungi and parasites among a
Chiappelli, Francesco +1 more
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Water tracks in the lower Lena River basin [PDF]
E3S Web of Conferences, 2020 In the permafrost regions, where water filtration zone is limited by the shallow active layer, the surface flow forms a network of hollows, called «water tracks», oriented along the slope gradient.
Tarbeeva Anna +4 more
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Permafrost in the Cretaceous supergreenhouse
Nature Communications, 2022 AbstractEarth’s climate during the last 4.6 billion years has changed repeatedly between cold (icehouse) and warm (greenhouse) conditions. The hottest conditions (supergreenhouse) are widely assumed to have lacked an active cryosphere. Here we show that during the archetypal supergreenhouse Cretaceous Earth, an active cryosphere with permafrost existed
Dr Juan Pedro Rodríguez López +5 more
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Land, 2020 This paper presents the results of 39 years of observations conducted at the Chabyda station to monitor the thermal state of permafrost landscapes under current climatic warming.
Stepan P Varlamov +2 more
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Establishment of Permafrost Thermal Monitoring Sites in East Siberia
Land, 2020 Permafrost lies close to the surface of the day, therefore, it is able to quickly respond to modern climatic changes. Under these conditions, the goal of understanding the evolution of permafrost in the near future requires monitoring studies of the ...
Pavel Konstantinov +4 more
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Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden [PDF]
, 2014 Northern peatlands in permafrost regions contain a large amount of organic carbon (C) in the soil. Climate warming and associated permafrost degradation are expected to have significant impacts on the C balance of these ecosystems, but the magnitude is ...
Backstrand, K +5 more
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Case 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
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The effect of human activities on moisture content of soils and underlying permafrost from the McMurdo Sound region, Antarctica [PDF]
, 1994 Soils and the underlying permafrost from undisturbed sites and sites that had been disturbed by construction activities at Marble Point and Pram Point in the McMurdo Sound region were sampled from excavated pits and drill cores. Gravimetric moisture (ice)
Balks, Megan R. +2 more
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Permafrost-Landscape Map of the Republic of Sakha (Yakutia) on a Scale 1:1,500,000
Geosciences, 2018 The history of permafrost landscape map compilation is related to the study of ecological problems with permafrost. Permafrost-landscape studies are now widely used in geocryological mapping. Permafrost-landscape classifications and mapping are necessary
Alexander N. Fedorov +22 more
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