New Results Based on Reprocessing of 13 years Continuous GPS Observations of the Fennoscandia GIA Process from BIFROST
New Results Based on Reprocessing of 13 years Continuous GPS Observations of the Fennoscandia GIA Process from BIFROST
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DOI：
10.1007/978-3-540-85426-5_66
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Lidberg;J. Johansson;H. Scherneck;G. Milne;James L. Davis
中科院分区：
文献类型：
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作者：
M. Lidberg;J. Johansson;H. Scherneck;G. Milne;James L. Davis
We present new and improved 3D velocity fields of the Fennoscandian Glacial Isostatic Adjustment (GIA) process derived from more than 4800 days (13 years) of data at more than 80 permanent GPS sites. We use the GAMIT/GLOBK software package for the GPS analysis. The solution has an internal accuracy at the level of 0.2 mm/yr (1 sigma) for horizontal velocities at the best sites. We present our results both in the ITRF2000 and in the new ITRF2005 reference frames, and discuss the difference in vertical rates associated with the choice of reference frame. Our vertical velocities agree with results derived from classic geodetic methods (tide-gauge, repeated levelling, and repeated gravity observations) at the 0.5 mm/yr level (1 sigma). We also compare the observations to predictions derived from a GIA model tuned to fit the new data and get agreement on the sub-millimeter level.
