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Space-Geodetic Constraints on Glacial Isostatic Adjustment in Fennoscandia

Glenn A. Milne ; James L. Davis ; Jerry X. Mitrovica ; Hans-Georg Scherneck (Institutionen för radio- och rymdvetenskap) ; Jan M. Johansson (Institutionen för radio- och rymdvetenskap) ; Martin Vermeer ; Hannu Koivula
Science (0036-8075). Vol. 291 (2001), 23 March 2001, p. 2381-2385.
[Artikel, refereegranskad vetenskaplig]

Analysis of Global Positioning System (GPS) data demonstrates that ongoing three-dimensional crustal deformation in Fennoscandia is dominated by glacial isostatic adjustment. Our comparison of these GPS observations with numerical predictions yields an Earth model that satisÞes independent geologic constraints and bounds both the average viscosity in the upper mantle (5 x 10^20 to 1 x 10^21 pascal seconds) and the elastic thickness of the lithosphere (90 to 170 kilometers). We combined GPS-derived radial motions with Fennoscandian tide gauge records to estimate a regional sea surface rise of 2.1 +- 0.3 mm/year. Furthermore, ongoing horizontal tectonic motions greater than ~1 mm/year are ruled out on the basis of the GPS-derived three-dimensional crustal velocity field.



Denna post skapades 2014-05-10. Senast ändrad 2015-10-20.
CPL Pubid: 197900

 

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Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap (1984-2004)

Ämnesområden

Fasta jordens fysik

Chalmers infrastruktur

Onsala rymdobservatorium