The main research question of this project is how the sediment supply to the Arctic coastal system is influenced by the changing climate. Accurate understanding of the effects of climate change on river sediment fluxes is needed to predict for instance changes in the biological productivity of the Arctic coastal ecosystem, which is vulnerable to changes in sediment and associated nutrient supply. ... The objective of this research is to make predictions of the sediment supply to the arctic oceans, by describing the interacting forcing factors and responses in a numerical model. To validate our model field observation in Arctic river systems are of vital importance. Geophysical and geomorphological studies are performed in different glaciofluvial valley systems. From this data, present and past sediment transport and deposition are reconstructed.