| Summary: | The Nordic countries Norway, Sweden, Finland and Denmark are a key study region for the research of glacial isostasy. In addition, it offers a unique opportunity for absolute gravimetry to show its capability as a geodetic tool for geophysical research. Within a multi-national cooperation, annual absolute gravity measurements have been performed in Fennoscandia by IfE since 2003. For the Hannover gravimeter FG5-220, an overall accuracy of +-30nm/s2 is indicated for a single station determination. First results of linear gravity changes are derived for 11 stations in the central and southern part of the uplift area. Comparing with the predicted rates of a glacial rebound modelling, the gravity trends of the absolute measurements differ by 20% (r.m.s. discrepancy) from the uplift model. The mean difference between observed and predicted rates is -0.6 nm/s2 per year only.
|
|---|