The acceleration of sea-level rise along the coast of the Netherlands started in the 1960s
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Published:2023-07-06
Issue:4
Volume:19
Page:991-1007
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ISSN:1812-0792
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Container-title:Ocean Science
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language:en
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Short-container-title:Ocean Sci.
Author:
Keizer IrisORCID, Le Bars DewiORCID, de Valk Cees, Jüling AndréORCID, van de Wal Roderik, Drijfhout Sybren
Abstract
Abstract. The global acceleration of sea-level rise (SLR) during the 20th century is now established.
On the local scale, this is harder to establish as several drivers of SLR play a role, which can mask the acceleration.
Here, we study the rate of SLR along the coast of the Netherlands from the average of six tide gauge records covering the period 1890–2021.
To isolate the effects of the wind field variations and the nodal tide from the local sea-level trend, we use four generalised additive models (GAMs) which include different predictive variables.
From the sea-level trend estimates, we obtain the continuous evolution of the rate of SLR and its uncertainty over the observational period.
The standard error in the estimation of the rate of SLR is reduced when we account for nodal-tide effects and is reduced further when we also account for the wind effects, meaning these provide better estimates of the rate of SLR.
A part of the long-term SLR is due to wind forcing related to a strengthening and northward shift of the jet stream, but this SLR contribution decelerated over the observational period.
Additionally, we detect wind-forced sea-level variability on multidecadal timescales with an amplitude of around 1 cm.
Using a coherence analysis, we identify both the North Atlantic Oscillation and the Atlantic Multidecadal Variability as its drivers.
Crucially, accounting for the nodal-tide and wind effects changes the estimated rate of SLR, unmasking an SLR acceleration that started in the 1960s.
Our best-fitting GAM, which accounts for nodal and wind effects, yields a rate of SLR of about 1.72.21.3 mm yr−1 in 1900–1919 and 1.51.91.2 mm yr−1 in 1940–1959 compared to 2.93.52.4 mm yr−1 in 2000–2019 (where the lower and upper bounds denote the 5th and 95th percentiles).
If we discount the nodal tide, wind and fluctuation effects and assume a constant rate of SLR, then the probability (p value) of finding a rate difference between 1940–1959 and 2000–2019 of at least our estimate is smaller than 1 %.
Consistent with global observations and the expectations based on the physics of global warming, our results show unequivocally that SLR along the Dutch coast has accelerated since the 1960s.
Publisher
Copernicus GmbH
Subject
Cell Biology,Developmental Biology,Embryology,Anatomy
Reference58 articles.
1. Baart, F., van Gelder, P. H. A. J. M., de Ronde, J., van Koningsveld, M., and
Wouters, B.: The Effect of the 18.6-Year Lunar Nodal Cycle on
Regional Sea-Level Rise Estimates, J. Coast. Res., 28,
511–516, https://doi.org/10.2112/JCOASTRES-D-11-00169.1, 2011. a, b, c 2. Baart, F., Rongen, G., Hijma, M., Kooi, H., de Winter, R., and Nicolai, R.:
Zeespiegelmonitor 2018: De stand van zaken rond de zeespiegelstijging langs
de Nederlandse kust, Tech. Rep., 187 pp.,
https://deltalife.deltares.nl/deltares/de_nederlandse_delta/zeespiegelstijging/160368/Zeespiegelmonitor_2018_final.pdf (last access: 1 June 2023),
2019. a, b, c 3. Bell, B., Hersbach, H., Simmons, A., Berrisford, P., Dahlgren, P., Horányi,
A., Muñoz-Sabater, J., Nicolas, J., Radu, R., Schepers, D., Soci, C.,
Villaume, S., Bidlot, J.-R., Haimberger, L., Woollen, J., Buontempo, C., and
Thépaut, J.-N.: The ERA5 global reanalysis: Preliminary extension to
1950, Q. J. Roy. Meteor. Soc., 147, 4186–4227,
https://doi.org/10.1002/qj.4174, 2021. a 4. Bingham, R. J. and Hughes, C. W.: Local diagnostics to estimate density-induced
sea level variations over topography and along coastlines: TOPOGRAPHY AND
SEA LEVEL, J. Geophys. Res.-Ocean., 117, C01013,
https://doi.org/10.1029/2011JC007276, 2012. a, b 5. Bokuchava, D. D. and Semenov, V. A.: Mechanisms of the Early 20th Century
Warming in the Arctic, Earth-Sci. Rev., 222, 103820,
https://doi.org/10.1016/j.earscirev.2021.103820, 2021. a
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