Publication details.

Paper

Year:2017
Author(s):A. Santamaría-Gómez, M. Gravelle, S. Dangendorf, M. Marcos, G. Spada, G. Wöppelmann
Title:Uncertainty of the 20th century sea-level rise due to vertical land motion errors
Journal:EARTH AND PLANETARY SCIENCE LETTERS
ISSN:0012-821X
JCR Impact Factor:4.581
Volume:473
Pages:24-32
D.O.I.:10.1016/j.epsl.2017.05.038
Web:https://dx.doi.org/10.1016/j.epsl.2017.05.038
Abstract:© 2017 Elsevier B.V. Assessing the vertical land motion (VLM) at tide gauges (TG) is crucial to understanding global and regional mean sea-level changes (SLC) over the last century. However, estimating VLM with accuracy better than a few tenths of a millimeter per year is not a trivial undertaking and many factors, including the reference frame uncertainty, must be considered. Using a novel reconstruction approach and updated geodetic VLM corrections, we found the terrestrial reference frame and the estimated VLM uncertainty may contribute to the global SLC rate error by ±0.2 mmyr−1. In addition, a spurious global SLC acceleration may be introduced up to ±4.8×10−3 mmyr−2. Regional SLC rate and acceleration errors may be inflated by a factor 3 compared to the global. The difference of VLM from two independent Glacio-Isostatic Adjustment models introduces global SLC rate and acceleration biases at the level of ±0.1 mmyr−1 and 2.8×10−3 mmyr−2, increasing up to 0.5 mm yr−1 and 9×10−3 mmyr−2 for the regional SLC. Errors in VLM corrections need to be budgeted when considering past and future SLC scenarios.

Related staff

  • Marta Marcos Moreno