Results 51 to 60 of about 244 (114)
Fossil Ice Wedges in Hampshire [PDF]
Nature, 1966 THREE large fossil ice wedges have been discovered in a coastal section exposed at Highcliffe in Hampshire (M.R. 215931). They are to be found within the Plateau Gravel in the uppermost part of the cliff at about 100′ O.D. Here 2.4 m of gravels rest on Barton Beds, at this point consisting of an impermeable glauconitic clay. On top of the gravels is an
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Ice Particle Impacts on a Moving Wedge [PDF]
6th AIAA Atmospheric and Space Environments Conference, 2014 This work presents the results of an experimental study of ice particle impacts on a moving wedge. The experiment was conducted in the Adverse Environment Rotor Test Stand (AERTS) facility located at Penn State University. The wedge was placed at the tip of a rotating blade.
Mario M. Vargas +5 more
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Enhanced heterogeneous ice nucleation by special surface geometry
Nature Communications, 2017 Understanding ice nucleation is important for the development of accurate cloud models. Here Biet al. show that sharp wedges can enhance ice nucleation both when the wedge geometry matches the ice lattice and when such matching is absent, in which case ...
Yuanfei Bi, Boxiao Cao, Tianshu Li
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Ice Wedge Casts in the Corton Beds [PDF]
Geological Magazine, 1968 The occurrence of casts of ice wedges indicative of a permafrost environment in the Pleistocene Corton beds of Norfolk, England, indicates that deposition of the beds took place in a cold period between the two advances of the Lowestoft glaciation.
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Soil and permafrost in the Ross Sea region of Antarctica: stable or dynamic?
Cuadernos de Investigación Geográfica, 2016 Soils in the Ross Sea Region of Antarctica generally comprise a surface desert pavement and a seasonally thawed active layer over permafrost. Most soils are formed on regolith such as glacial till or colluvium. Mean annual air temperatures range from -18°
M. R. Balks, T. A. O’Neill
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The Depositional Record, 2019 In the eastern part of the Karoo Basin of South Africa, the sedimentary record of the Late Palaeozoic Ice Age, the Dwyka Group, consists of an up to 200 m thick accumulation of massive to crudely stratified diamictite occasionally interstratified with ...
Pierre Dietrich, Axel Hofmann
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Frontiers in Earth Science, 2020 Scientific knowledge and engineering tools for predicting coastal erosion are largely confined to temperate climate zones that are dominated by non-cohesive sediments. The pattern of erosion exhibited by the ice-bonded permafrost bluffs in Arctic Alaska,
Matthew A. Thomas +5 more
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Bioreactivity of dissolved organic matter in ponds of the ice-wedge polygonal tundra [PDF]
BiogeosciencesThe role of ponds in transforming dissolved organic matter (DOM) within landscapes affected by permafrost thawing remains poorly understood, despite their potential importance in carbon cycling.
T. Pacoureau +8 more
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Evaporation dominates evapotranspiration on Alaska’s Arctic Coastal Plain
Arctic, Antarctic, and Alpine Research, 2018 The dynamics of evapotranspiration (ET), such as the partitioning to evaporation and transpiration, of polygonal ground on the Arctic Coastal Plain are not well understood.
Jessica M. Young-Robertson +7 more
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Remote Sensing, 2018 Rapid warming has occurred over the past 50 years in Arctic Alaska, where temperature strongly affects ecological patterns and processes. To document landscape change over a half century in the Arctic National Wildlife Refuge, Alaska, we visually ...
Janet C. Jorgenson +3 more
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