Mathematics – Logic
Scientific paper
Mar 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3206308n&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 6, CiteID L06308
Mathematics
Logic
12
Geodesy And Gravity: Space Geodetic Surveys, Geodesy And Gravity: Rheology Of The Lithosphere And Mantle (7218, 8160), Geodesy And Gravity: Reference Systems, Geodesy And Gravity: Non-Tectonic Deformation
Scientific paper
Direct measurements of surface deformation due to Glacial Isostatic Adjustment (GIA) in Europe have been so far mostly limited to the present-day uplift area. Here, we use permanent GPS networks results to investigate the significance of GIA effects in Europe south of Fennoscandia. We show that uplift in Fennoscandia is surrounded by subsidence reaching as far south as the Alps, with a maximum vertical rate of 1.5 mm/yr between 50.5-53°N. Horizontal velocity gradients show shortening between Fennoscandia and north-central Europe with strain rates of ~10-9 yr-1 and principal compressional strain axis pointing to the Gulf of Bothnia in a radial pattern. We find a very good quantitative agreement with the 3D surface displacement predicted by Milne et al. (2001), although the increase of misfit in far-field of Fennoscandia suggests that geodetic data outside of the uplift area may bring additional constraints to the rheological parameters used in GIA models.
Calais Eric
Nocquet Jean-Mathieu
Parsons Barry
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