Uncertainty of the 20th century sea-level rise due to vertical land motion errors. Santamaría-Gómez, A., Gravelle, M., Dangendorf, S., Marcos, M., Spada, G., & Wöppelmann, G. Earth and Planetary Science Letters, 473:24–32, September, 2017. ![Uncertainty of the 20th century sea-level rise due to vertical land motion errors [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 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.
@article{santamaria-gomez_uncertainty_2017,
title = {Uncertainty of the 20th century sea-level rise due to vertical land motion errors},
volume = {473},
issn = {0012-821X},
url = {http://www.sciencedirect.com/science/article/pii/S0012821X17303060},
doi = {10.1016/j.epsl.2017.05.038},
abstract = {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.},
language = {en},
urldate = {2020-01-27},
journal = {Earth and Planetary Science Letters},
author = {Santamaría-Gómez, Alvaro and Gravelle, Médéric and Dangendorf, Sönke and Marcos, Marta and Spada, Giorgio and Wöppelmann, Guy},
month = sep,
year = {2017},
keywords = {GPS, tide gauges, vertical land motion, GIA, reference frame, sea-level reconstruction},
pages = {24--32}
}
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