Shore-level displacement in Fennoscandia calculated from empirical data

Shore-level displacement and glacio-isostatic uplift in the area affected by the Scandinavian ice is calculated from empirical data. Besides 79 shore-level curves from Scandinavia the calculations are also based on some detailed lake-tilting investigations and information concerning present relative uplift recorded by precision levelling and tide gauge data. The course of glacio-isostatic uplift is expressed in solely mathematical terms. The model is transformed to a GIS-application using levelling data. Maps showing the distribution between land, lakes and sea at different times are produced by this application. These maps can also be designed to show changes of the hydrography through time including changes in lakes, glacial lakes, rivers and drainage basins. The accuracy of the calculated shore-levels is generally very high. A result of the calculation is that the existence of the Baltic Ice Lake is questioned as both the calculations and an analysis of the earlier used proofs of the Baltic Ice Lake show that the Baltic basin was most probably at sea level.