Results 21 to 30 of about 71,705 (309)

Ice wedges as archives of winter palaeoclimate: a review [PDF]

, 2018
Ice wedges are a characteristic feature of northern permafrost landscapes and grow mainly by snowmelt that refreezes in thermal contraction cracks that open in winter.
Andreev, Ashastina, Baker, Biskaborn, Blaauw, Black, Blinov, Boereboom, Braconnot, Briner, Christiansen, Christiansen, Dansgaard, Elias, Ewing, Fortier, Freitag, Fritz, Froese, Gasanov, Gilichinsky, Kaufman, Kokelj, Konishchev, Konyakhin, Lacelle, Lachenbruch, Lachniet, Laepple, Lauriol, Liu, Mackay, Mackay, Mackay, Mackay, Mackay, Mackay, Mackay, Marcott, Matsuoka, McKay, Meyer, Meyer, Meyer, Meyer, Meyer, Michel, Michel, Murton, Münch, Münch, Nikolayev, O'Neill, Opel, Opel, Opel, PAGES2k Consortium, Porter, Schirrmeister, Sejrup, Sokratov, St-Jean, Steen-Larsen, Streletskaya, Streletskaya, Sundqvist, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Wacker, Wang, Wanner, Werner, Werner, Wetterich, Wetterich, Wetterich, Yang, Yang   +81 more
core   +2 more sources

Ice-wedge stable isotopes at the Dmitry Laptev Strait (Northeast Siberian Arctic) – indications for Late Quaternary stratigraphy and paleoclimate [PDF]

, 2016
Ice wedges are the most abundant type of ground ice in the ice-rich permafrost deposits of the Northeast Siberian Arctic. They are formed by the periodic repetition of frost cracking and subsequent crack filling and refreezing in spring, mostly by melt ...
Dereviagin, Alexander Yu, Fuchs, Margret, Meyer, Hanno, Opel, Thomas, Schirrmeister, Lutz, Wetterich, Sebastian   +5 more
core   +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

Special Issue: Recent advances (2008 – 2015) in the study of ground ice and cryostratigraphy [PDF]

, 2016
Cryostratigraphy involves the description, interpretation and correlation of ground-ice 17 structures (cryostructures) and their relationship to the host deposits.
Abramov, Alexeev, Badu, Bode, Calmels, Calmels, Calmels, Calmels, Cheng, Cnudde, Coulombe, Couture, Douglas, Ducharme, Everdingen, Fortier, Fortier, Fotiev, Fotiev, French, Fritz, Fritz, Froese, Härtel, Iwahana, Jorgenson, Kanevskiy, Kanevskiy, Kanevskiy, Kanevskiy, Kanevskiy, Kanevskiy, Katasonov, Konishchev, Kritsuk, Kuhry, Kuhry, Lacelle, Lacelle, Lacelle, Lacelle, Lacelle, Lacelle, Lachniet, Lapalme, Lauriol, Leibman, Mackay, Mackay, Mackay, Mel'nikov, Meyer, Meyer, Michel, Morse, Murton, Murton, Murton, O'Neill, Opel, Osterkamp, Phillips, Popov, Pumple, Raffi, Reyes, Riddle, Rogov, Schirrmeister, Schirrmeister, Seppälä, Sharkuu, Shpolyanskaya, Shur, Shur, Shur, Shur, Skurikhin, Slagoda, Slagoda, Slagoda, Sliger, Solomatin, Solomatin, Spektor, Spektor, St-Jean, Stephani, Stephani, Strauss, Strauss, Streletskaya, Streletskaya, Tumskoy, Ulrich, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasiliev, Wetterich, Wetterich, Wolfe, Wünnemann, Yoshikawa   +110 more
core   +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

Ice-creams and wedge graphs

Computational Geometry, 2013
What is the minimum angle $ >0$ such that given any set of $ $-directional antennas (that is, antennas each of which can communicate along a wedge of angle $ $), one can always assign a direction to each antenna such that the resulting communication graph is connected?
Ackerman, Eyal, Gelander, Tsachik, Pinchasi, Rom   +2 more
openaire   +2 more sources

Flow and retreat of the Late Quaternary Pine Island-Thwaites palaeo-ice stream, West Antarctica [PDF]

, 2010
Multibeam swath bathymetry and sub-bottom profiler data are used to establish constraints on the flow and retreat history of a major palaeo-ice stream that carried the combined discharge from the parts of the West Antarctic Ice Sheet now occupied by the ...
Alastair G. C. Graham, Alley, Anandakrishnan, Anderson, Anderson, Canals, Clark, Claus-Dieter Hillenbrand, Conway, Domack, Dowdeswell, Dowdeswell, Dowdeswell, Dowdeswell, Evans, Evans, Gerhard Kuhn, Graham, Heroy, Holt, Hubbard, Hughes, Jacobs, James A. Smith, Jeffrey Evans, Julian A. Dowdeswell, Karsten Gohl, King, Larter, Larter, Lowe, Lowe, Mosola, Nitsche, Noormets, Nygård, Ottesen, Ottesen, Payne, Pritchard, Pudsey, Rignot, Rignot, Rignot, Rignot, Rignot, Robert D. Larter, Schoof, Scott, Sharpe, Shaw, Shepherd, Shepherd, Shipp, Shipp, Smith, Stokes, Stokes, Stokes, Tara Deen, Thoma, Vaughan, Vaughan, Vaughan, Vaughan, Walker, Weertman, Wellner, Ó Cofaigh, Ó Cofaigh, Ó Cofaigh, Ó Cofaigh   +71 more
core   +1 more source

Spatial variability of CO₂ uptake in polygonal tundra: assessing low-frequency disturbances in eddy covariance flux estimates [PDF]

Biogeosciences, 2017
The large spatial variability in Arctic tundra complicates the representative assessment of CO2 budgets. Accurate measurements of these heterogeneous landscapes are, however, essential to understanding their vulnerability to climate change.
N. Pirk, N. Pirk, J. Sievers, J. Mertes, J. Mertes, F.-J. W. Parmentier, M. Mastepanov, M. Mastepanov, T. R. Christensen, T. R. Christensen   +9 more
doaj   +1 more source

Coupling of Finite Element Method and Peridynamics to Simulate Ship-Ice Interaction

Journal of Marine Science and Engineering, 2023
In this work, the finite element method (PD-FEM) coupling strategy is used to simulate ship-ice interaction. Two numerical benchmark tests are selected to validate the coupling approach and its program.
Renwei Liu, Yanzhuo Xue, Xikui Lu
doaj   +1 more source

Nucleation- and Emergence-Limited Growth of Ice from Pores [PDF]

, 2018
Nucleation of ice from vapor on atmospheric aerosols has been attributed to the condensation and freezing of supercooled water in small pores. Here we use wedge pores on mica to directly observe the growth of ice in confinement prior to the growth of ...
Campbell, JM, Christenson, HK
core   +1 more source