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https://doi.org/10.5194/os-2020-81
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-2020-81
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  13 Oct 2020

13 Oct 2020

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This preprint is currently under review for the journal OS.

Recent sea level rise on Ireland's east coast based on multiple tide gauge analysis

Amin Shoari Nejad1, Andrew C. Parnell1, Alice Greene2, Brian P. Kelleher3, and Gerard McCarthy2 Amin Shoari Nejad et al.
  • 1Hamilton Institute, Insight Centre for Data Analytics, Maynooth University, Kildare, Ireland
  • 2ICARUS, Department of Geography, Maynooth University, Maynooth, Ireland
  • 3School of Chemical Sciences, Dublin City University, Dublin 9, Ireland

Abstract. We analysed multiple tide gauges from the east coast of Ireland over the period 1938–2018. We validated the different time series against each other and performed a missing value imputation exercise, which enabled us to produce a homogenised record. The recordings of all tide gauges were found to be in good agreement between 2003–2015, though this was markedly less so from 2016 to the present. We estimate the sea level rise in Dublin port for this period at 10 mm yr−1. The rate over the longer period of 1938–2015 was 1.67 mm yr−1 which is in good agreement with the global average. We found that the rate of sea level rise in the longer term record is cyclic with some extreme upward and downward trends. However, starting around 1980, Dublin has seen significantly higher rates that have been always positive since 1996, and this is mirrored in the surrounding gauges. Furthermore, our analysis indicates an increase in sea level variability since 1980. Both decadal rates and continuous time rates are calculated and provided with uncertainties in this paper.

Amin Shoari Nejad et al.

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Data sets

Dublin Bay Project Amin Shoari Nejad, Andrew C. Parnell, Alice Greene, Brian P. Kelleher, and Gerard McCarthy https://doi.org/10.5281/zenodo.4000747

Model code and software

Dublin Bay Project Amin Shoari Nejad, Andrew C. Parnell, Alice Greene, Brian P. Kelleher, and Gerard McCarthy https://doi.org/10.5281/zenodo.4000747

Amin Shoari Nejad et al.

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Short summary
Following the concerns regarding the consequences of global warming and sea levels rise around the globe, we decided to evaluate how Dublin bay, as an important metropolitan area, is getting affected. After analysing the recordings of multiple tide gauges that are measuring sea levels in the bay, we found that the sea level has been rising 10 millimeters per year between 2003 and 2015 in the region. Also according to our estimations, sea level rise has not been negative since 1996.
Following the concerns regarding the consequences of global warming and sea levels rise around...
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