Vertical crustal motion determined by satellite altimetry and tide gauge data in Fennoscandia

C. Y. Kuo, C. K. Shum, A. Braun, J. X. Mitrovica

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84 Citations (Scopus)


We present a new method of combining satellite altimetry and the gauge data to obtain improved estimates of absolute (or geocentric) vertical crustal motion at tide gauges within a semi-enclosed sea. As an illustration, we combine TOPEX/POSEIDON altimerry data (1992-2001) and 25 long-term (>40 years) tide gauge records around the Baltic Sea region of Fennoscandia, an area where crustal deformation is dominated by glacial isostatic adjustment (GIA). A comparison of the estimated vertical motion, at 1-11 mm/yr, with independent solutions from 10 collocated BIFROST GPS sites, shows a difference of 0.2 ± 0.9 mm/yr, thus verifying the accuracy and robustness of the procedure. The solution uncertainty is estimated at 0.4 mm/yr, which is significantly lower than previous analyses of this type. We conclude that our technique can potentially provide accurate vertical motion observations globally where long-term tide gauge records exist.

Original languageEnglish
Pages (from-to)L01608 1-4
JournalGeophysical Research Letters
Issue number1
Publication statusPublished - 2004 Jan 16

All Science Journal Classification (ASJC) codes

  • Geophysics
  • General Earth and Planetary Sciences


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