Abisko ; Analyse de régression ; Analyse spatiale ; Dynamique de versant ; Modèle ; Montagne ; Périglaciaire ; Solifluxion ; Suède ; Zone froide
Cold area ; Model ; Mountain ; Periglacial features ; Regression analysis ; Slope dynamics ; Solifluction ; Spatial analysis ; Sweden
The occurrence of turf-banked solifluction landforms in the Abisko region was analysed using a grid-based approach and statistical modelling through logistic regression. Significant parameters in the model were the vegetation index NDVI, annual
incoming potential radiation, wetness index, slope gradient and elevation. The model had an acceptable discrimination capacity and rather low model-fit values, but clearly showed the importance of vegetation patterns for the occurrence of solifluction
at a regional scale. Solifluction movement rates measured at 8 sites were combined with model parameters and the annual duration of sun hours to regionalise solifluction movement rates through an unsupervised terrain classification. For comparison, the linear