Print Email Facebook Twitter Regional biases in absolute sea-level estimates from tide gauge data due to residual unmodeled vertical land movement Title Regional biases in absolute sea-level estimates from tide gauge data due to residual unmodeled vertical land movement Author King, M.A. Keshin, M. Whitehouse, P.L. Thomas, I.D. Milne, G. Riva, R.E.M. Faculty Civil Engineering and Geosciences Department Geoscience & Remote Sensing Date 2012-07-27 Abstract The only vertical land movement signal routinely corrected for when estimating absolute sea-level change from tide gauge data is that due to glacial isostatic adjustment (GIA). We compare modeled GIA uplift (ICE-5G + VM2) with vertical land movement at ?300 GPS stations located near to a global set of tide gauges, and find regionally coherent differences of commonly ±0.5–2 mm/yr. Reference frame differences and signal due to present-day mass trends cannot reconcile these differences. We examine sensitivity to the GIA Earth model by fitting to a subset of the GPS velocities and find substantial regional sensitivity, but no single Earth model is able to reduce the disagreement in all regions. We suggest errors in ice history and neglected lateral Earth structure dominate model-data differences, and urge caution in the use of modeled GIA uplift alone when interpreting regional- and global- scale absolute (geocentric) sea level from tide gauge data. Subject absolute sea levelbiasrelative sea levelvertical land movement To reference this document use: http://resolver.tudelft.nl/uuid:756f67ba-15e9-4034-9e10-67b93243da1e DOI https://doi.org/10.1029/2012GL052348 Publisher American Geophysical Union ISSN 0094-8276 Source Geophysical Research Letters, 39 (14), 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 American Geophysical Union Files PDF Riva_2012.pdf 1.39 MB Close viewer /islandora/object/uuid:756f67ba-15e9-4034-9e10-67b93243da1e/datastream/OBJ/view