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A study on the Fennoscandian post-glacial rebound as observed by present-day uplift rates and gravity field model GOCO02S
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
2013 (English)In: Acta Geodaetica et Geophysica, ISSN 2213-5812, Vol. 48, no 3, 317-331 p.Article in journal (Refereed) Published
Abstract [en]

Repeated absolute gravity measurements in Fennoscandia have revealed that the on-going post-glacial rebound can be regarded as a pure viscous flow of mantle mass of density 3390 kg/m(3) towards the central part of the region caused by a gravity/uplift rate of -0.167 mu Gal/mm. Our model estimates the rebound induced rates of changes of surface gravity and geoid height to have peaks of -1.9 mu Gal/yr and 1.6 mm/yr, respectively, the former being consistent with absolute gravity observations. The correlation coefficient of the spherical harmonic representations of the geoid height and uplift rate for the spectral windows between degrees 10 and 70 is estimated to -0.99 +/- 0.006, and the maximum remaining land uplift is estimated to the order of 80 m. Both the (almost) linear increase of relaxation time with degree and the linear relation between geoid height and uplift rate support a model with mass flow in the major part of the mantle and disqualify the model with a flow in a thin channel below the crust. The mean viscosity of the flow in the central uplift region is estimated to 4x10(21) Pa s.

Place, publisher, year, edition, pages
2013. Vol. 48, no 3, 317-331 p.
Keyword [en]
Fennoscandia, Geoid, Mantle flow, Post-glacial rebound, Viscosity
National Category
Geochemistry Geophysics
Identifiers
URN: urn:nbn:se:kth:diva-127737DOI: 10.1007/s40328-013-0025-5ISI: 000323222300007Scopus ID: 2-s2.0-84882708529OAI: oai:DiVA.org:kth-127737DiVA: diva2:646341
Note

QC 20130909

Available from: 2013-09-09 Created: 2013-09-05 Last updated: 2013-09-09Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
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  • asciidoc
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