HR: 1340h
AN: G53A-0108    [Abstracts]
TI: Eleven Years of Continuous GPS Observations and Inference of Three-Dimensional Deformation in Fennoscandia
AU: Johansson, J M
EM: jmj@oso.chalmers.se
AF: Chalmers University of Technology, Onsala Space Observatory, Onsala, SE-43992 Sweden
AU: Lidberg, M
EM: lidberg@oso.chalmers.se
AF: Chalmers University of Technology, Onsala Space Observatory, Onsala, SE-43992 Sweden
AU: Scherneck, H
EM: hgs@oso.chalmers.se
AF: Chalmers University of Technology, Onsala Space Observatory, Onsala, SE-43992 Sweden
AU: Bergstrand, S
EM: sten@oso.chalmers.se
AF: Chalmers University of Technology, Onsala Space Observatory, Onsala, SE-43992 Sweden
AU: * Haas, R
EM: haas@oso.chalmers.se
AF: Chalmers University of Technology, Onsala Space Observatory, Onsala, SE-43992 Sweden
AB: The land uplift processes in Fennoscandia have been subject to scientific research for more than a century. The cause of this land uplift phenomenon is a glacial isostatic adjustment (GIA) process, which has its origin in the last ice age that culminated about 20 kyr ago. In 1993, the Baseline Inferences for Fennoscandian Rebound Observations Sea Level and Tectonics (BIFROST) project was started, with a primary goal to establish a 3D observable, able to constrain models of the GIA process in Fennoscandia. In this study we have analysed continuous GPS observations from August 1993 until August 2004. We also present results from different methods used to re-analyse the BIFROST data. The Precise Point Positioning technique (PPP) available for the GIPSY software has been applied, the elevation cut-off angle is lowered from 15,a to 10,a making especially the vertical component of the solution stronger. In addition we also solve for integer ambiguities. To be able to study possible software specific effects, we have performed additional analyses using the GAMIT/GLOBK and Bernese software packages. A detailed description of the different GPS processing results, analysis of the GPS time series, and comparisons with GIA model predictions are presented. Finally, we present error analyis, spatial and temporal correlations, and additional signals visible in the data.
DE: 8160 Rheology--general
DE: 1208 Crustal movements--intraplate (8110)
DE: 1294 Instruments and techniques
DE: 1645 Solid Earth
DE: 0694 Instrumentation and techniques
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting