Observations et premières mesures sur la gélifluction en Vanoise: les loupes de Lanserlia (Alpes française internes)
profondes dans certaines stations. Ce mouvement de migration différentielle vers l'aval est interprété comme dû à la gélifluction des terrains lors du dégel, doublée d'une solifluction sans intervention du gel au cours de l'été.
hummocks, string bogs, patterned grounds of different types, sand and soil wedges, stone stripes, gelifluction terraces, frost weathering, deflation and dune formation, and phenomena produced by river and lake ice.
Active layer ; Arctic Ocean;Arctic Region ; Central Europe ; Climatic zone ; Europe ; Gelifluction ; Ice wedge ; Palaeo-environment ; Periglacial features ; Permafrost ; Stratigraphy ; Svalbard
. The retreat of slopes is a result mainly of frost weathering, nivation, gravitational slope processes, rill-erosion and suffosion. The main processes operating on cryopediments are sheetwash and gelifluction. It is possible that in some places the development
and therefore saturated conditions are believed to enhance gelifluction at these locations. The smaller forms on the vegetation- and snow-free summit sites are believed to be dominated by frost creep.
disparition du couvert forestier vers 2600, 2200, 1600-1400, 1000-900 et 500-300ans BP. Après le réchauffement de 1940-1970 on observe actuellement une tendance inverse. L'apparition récente de grandes coulées de gélifluction sur les versants enneigés
-weathering profiles with thick humus horizon and marks of podsolization process. Biological aggradation has been stronger than morphological degradation. Gelifluction turf terraces have originated after the climatic optimum. They have transformated into stone
Climatic change ; Colorado ; Electrical resistivity tomography ; Gelifluction ; Model ; Mountain ; Periglacial features ; Permafrost ; Rocky Mountains ; Slope exposure ; Soil temperature ; United States of America
facing slopes, permafrost neither exists at 2 m depth on wet sites nor at 4 m depth on dry sites as suggested during the 1970s. The modeling approach further suggests that, except on wet gelifluction lobes, it is likely that permafrost was not present
l'épaisseur de la couche active. La glace de sol est limitée aux glaciers rocheux et aux coins de glace. Des sols polygonaux actifs et non actifs existent dans toute la région. En raison de la présence de glaciers rocheux inactifs, de lobes de gélifluction et