Artículo| Año: | 2017 |
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| Autor(es): | A. Santamaría-Gómez, M. Gravelle, S. Dangendorf, M. Marcos, G. Spada, G. Wöppelmann |
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| Título: | Uncertainty of the 20th century sea-level rise due to vertical land motion errors |
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| Revista: | EARTH AND PLANETARY SCIENCE LETTERS |
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| ISSN: | 0012-821X |
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| JCR Impact Factor: | 4.581 |
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| Volumen: | 473 |
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| Páginas: | 24-32 |
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| D.O.I.: | 10.1016/j.epsl.2017.05.038 |
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| Web: | https://dx.doi.org/10.1016/j.epsl.2017.05.038 |
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| Resumen: | © 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. |
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