Arctic Region ; Cold area ; Ice wedge ; Ice wedges ; Periglacial features ; Snow ; Snow cover ; Soil temperature ; Soil wedge polygon ; Svalbard ; Thermal regime
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.
Arctic Region ; Avalanche ; Model ; Periglacial features ; Permafrost ; Rock glacier ; Snow ; Spitsbergen ; Svalbard
Visual year-round observations have shown that snow avalanches are driving the formation of rock glaciers near the glacier Larsbreen in central Svalbard. This model appeas consistent with information on the origin and geometry of internal structures