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Conference Paper

Gravity change in the Fennoscandian uplift area observed by absolute gravimetry.

Authors

Timmen,  L.
External Organizations;

Gitlein,  O.
External Organizations;

/persons/resource/volkerk

Klemann,  Volker
Deutsches GeoForschungsZentrum;

Wolf,  D.
External Organizations;

, 

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Citation

Timmen, L., Gitlein, O., Klemann, V., Wolf, D. (2009): Gravity change in the Fennoscandian uplift area observed by absolute gravimetry., (Geophysical Research Abstracts; Vol. 11, EGU2009-1834-1), General Assembly European Geophysical Union (Vienna, Austria 2009).


https://gfzpublic.gfz-potsdam.de/pubman/item/item_238765
Abstract
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.