Thermal regime of ice-wedge cracking in Adventdalen, Svalbard

In honour of Professor Emeritus Hugh M. French : papers from the joint Meeting of the Canadian Geomorphology Research Group and l'Association Québécoise pour l'Etude du Quaternaire, May 2004. Special Issue

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Description :
One year of monitoring (2002-2003) at a low-centred ice-wedge polygon site on Svalbard is described. Ground temperatures were recorded hourly from the top of an ice wedge through the active layer to the ground surface in the central part of a trough and in the adjacent rampart. Daily data on snow-cover depth were collected by automatic digital photography. Cracks were mapped in February, April and July. The results show that cracking occurred after ground temperatures at the centre of the ice-wedge top decreased to below -15°c. Ground cooling in mid-winter occurred mainly through the snow-free ramparts because the ice-wedge troughs were filled by snow to depths of up to 30 cm.

Type de document :
Article de monographie

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2005, vol. 16, n°. 1, p. 87-98, nombre de pages : 12, Collation : Illustration, Références bibliographiques : 26 ref.

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Pays édition : Royaume-Uni, Chichester, Wiley

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