Estimates of vertical crustal motion derived from differences of TOPEX/POSEIDON and tide gauge sea level measurements

Details Estimates of vertical crustal motion derived from differences of TOPEX/POSEIDON and tide gauge sea level measurements Estimates of vertical crustal motion derived from differences of TOPEX/POSEIDON and tide gauge sea level measurements

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29s..40n&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 19, pp. 40-1, CiteID 1934, DOI 10.1029/2002GL015037

Physics

16

Geodesy And Gravity: Instruments And Techniques, Oceanography: General: Instruments And Techniques, Oceanography: Physical: Sea Level Variations

Scientific paper

We have computed estimates of the rate of vertical crustal motion from differences of sea level measurements made by the TOPEX/POSEIDON radar altimeter and a globally distributed network of 114 tide gauges. A rigorous error analysis was performed which suggests the accuracy of the estimated vertical rates is approximately 1-2 mm/year for roughly half of the tide gauges, which is sufficiently accurate to detect a variety of geophysical phenomena. While only a cursory analysis of the estimated crustal motion rates was performed, we observed many interesting phenomena including significant uplift at volcanic islands in the Pacific and uplift of 7-9 mm/year along the southwest coast of Alaska. The results reported here will be useful in a variety of geophysical studies, as well as for validation of similar estimates of vertical crustal motion provided by precise geodetic techniques such as SLR, DORIS, GPS, and VLBI.

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