Abstract
The quantification of the long-term variability of relative sea-level is a fundamental problem in geodesy. In the present study, quantile regression is applied for characterising the long-term variability in relative sea-level at the Gedser and Hornbæk tide gauges, in the North Sea–Baltic Sea transition zone. Quantile regression allows to quantify not only the rate of change in mean sea-level but also in extreme heights, providing a more complete description of long-term variability. At Gedser the lowest relative heights are increasing at a rate approximately 40% higher than the mean rate, while at Hornbæk the relative sea-level slopes are stable across most of the quantiles. A 30-year running window analysis shows that the linear trends display considerable decadal variability over the twentieth century for both stations.
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Acknowledgements
Thanks are due to R. Koenker for providing the R-package quantreg, to the R development core team for the R software, and to P. Wessel and W.H.F. Smith for the GMT software. This work is supported by FCT (contract under Programme Ciencia 2008).
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Barbosa, S.M., Madsen, K.S. (2012). Quantile Analysis of Relative Sea-Level at the Hornbæk and Gedser Tide Gauges. In: Kenyon, S., Pacino, M., Marti, U. (eds) Geodesy for Planet Earth. International Association of Geodesy Symposia, vol 136. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-20338-1_69
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DOI: https://doi.org/10.1007/978-3-642-20338-1_69
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