The isotope-geochemical investigations on the archipelago of Spitsbergen (Svalbard) were aimed at finding out correlations between the isotopic and geochemical compositions of firn and ice and changes in natural conditions. The isotopic curves by all the 5 Spitsbergen ice cores display great variations reflecting the changes in the climatic conditions during the last 800-900 years. The accumulation mechanism of Cl, Na and K is more complicated, as the concentration of these elements, as well as their rations differ depending on the geographical location of the glaciers and their type of feeding.