Results 171 to 180 of about 574,554 (206)
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A field perspective on modelling ‘single-ridge’ ice-wedge polygons
Permafrost and Periglacial Processes, 2004AbstractPlug and Werner (Nature 2002, vol. 417, pp. 929–933) have constructed a model for the growth of ice‐wedge polygons. Contrary to field evidence, the model describes development of ice wedges in frozen ground beneath a centre line of ridges and assumes that effects associated with perturbations in the thermal stress field due to growth of ...
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Geografisk Tidsskrift-Danish Journal of Geography, 1976
Svensson, Harald, 1976; Relict ice-wedge polygons revealed on aerial photographs from Kaltenkirchen, northern Germany. Geografisk Tidsskrift 75: 8–12. Kobenhavn, juni 1, 1976. On aerial photographs polygonal patterns are detected in cultivated fields due to vegetational contrasts.
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Svensson, Harald, 1976; Relict ice-wedge polygons revealed on aerial photographs from Kaltenkirchen, northern Germany. Geografisk Tidsskrift 75: 8–12. Kobenhavn, juni 1, 1976. On aerial photographs polygonal patterns are detected in cultivated fields due to vegetational contrasts.
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Ice-wedge polygons and solifluction in the Adventdalen area, Spitsbergen, Svalbard
Norsk Geografisk Tidsskrift - Norwegian Journal of Geography, 2002In the Adventdalen area, ice-wedge polygons are numerous from sea level up to altitudes of at least 500 m a.s.l. In higher areas, polygons are found in weathering material, mostly on bedrock Cretaceous in age or older. Many polygons are found on slopes inclined up to at least 25°.
L. Sørbel, J. Tolgensbakk
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Holocene ice-wedge polygon development in northern Yukon permafrost peatlands (Canada) [PDF]
Quaternary Science Reviews, 2016 Ice-wedge polygon (IWP) peatlands in the Arctic and Subarctic are extremely vulnerable to climatic and environmental change. We present the results of a multidisciplinary paleoenvironmental study on IWPs in the northern Yukon, Canada. High-resolution laboratory analyses were carried out on a permafrost core and the overlying seasonally thawed ...
Juliane Wolter +2 more
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Ice‐wedge casts and relict polygonal patterns in Scandinavia
Journal of Quaternary Science, 1988AbstractIce‐wedge casts in Scandinavia frequently occur in three regions: (a) southwestern Jutland (outside the limit of the Weichselian glaciation); (b) southwestern Sweden; and (c) northernmost Norway. The latter two areas are both early deglaciated regions.
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Ice-Wedge Polygons of Northern Alaska
1982Ice-wedge polygons, commonly 5–30 m in diameter, are strikingly developed over the Arctic Coastal Plain of northern Alaska. Troughs over ice wedges that outline the polygons are a few centimeters to several meters wide. Centers of polygons are flat, high centered, or low centered in a continuum in which relief generally is several decimeters to a meter.
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Imaging a Polygonal Network of Ice-Wedge Casts with an Electromagnetic Induction Sensor
Soil Science Society of America Journal, 2011Images of the morphology of a polygonal network of ice-wedge casts are a valuable aid to paleoclimatological reconstructions. Usually such images are obtained by aerial photography showing polygonal crop marks refl ecting textural diff erences between wedge fi lling and host material.
Eef Meerschman +7 more
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Zonal peculiarities of polygonal ice‐wedge relief in Western Siberia
Polar Geography, 1979Abstract The polygonal ice‐wedge formations of Western Siberia have a marked zonality. This is manifest in the morphological characteristics of the ice‐wedge polygon relief, associated with various stages of development of the ice wedges, i.e., those of growth, preservation, melting, and, finally, a residual stage.
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Ice wedges (IWs), one of the most widespread landforms and most abundant forms of ground ice in the Arctic, form complex landscape mosaics. Characterizing IWs and their distribution is essential to provide improved understanding of landscape-scale hydrology and associated processes in a warming climate.
Roxanne Frappier +3 more
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Roxanne Frappier +3 more
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Norsk Geografisk Tidsskrift, 2005
Scandinavian networks of relict ice wedge polygons are revealed by aerial photographs, (a) on the Swedish west coast and in south-western Jutland, Denmark, as vegetation patterns (crop marks) during dry seasons, and (b) in north-eastern Norway, as a pattern of shallow trenches enhanced by vegetation. The most regularly shaped and equally sized polygons
Harald Svensson
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Scandinavian networks of relict ice wedge polygons are revealed by aerial photographs, (a) on the Swedish west coast and in south-western Jutland, Denmark, as vegetation patterns (crop marks) during dry seasons, and (b) in north-eastern Norway, as a pattern of shallow trenches enhanced by vegetation. The most regularly shaped and equally sized polygons
Harald Svensson
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