Preprints
https://doi.org/10.5194/os-2021-92
https://doi.org/10.5194/os-2021-92

  11 Oct 2021

11 Oct 2021

Review status: this preprint is currently under review for the journal OS.

A newly reconciled data set for identifying sea level rise and variability in Dublin Bay

Amin Shoari Nejad1, Andrew C. Parnell1, Alice Greene2, Peter Thorne2, Brian P. Kelleher3, Robert J. N. Devoy4, 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
  • 4Department of Geography, University College Cork, Cork, Ireland

Abstract. We provide an updated sea level dataset for Dublin for the period 1938 to 2016 at yearly resolution. Using a newly collated sea level record for Dublin Port, as well as two nearby tide gauges at Arklow and Howth Harbour, we perform data quality checks and calibration of the Dublin Port record by adjusting the biased high water level measurements that affect the overall calculation of mean sea level (MSL). To correct these MSL values, we use a novel Bayesian linear regression that includes the Mean Low Water values as a predictor in the model. We validate the re-created MSL dataset and show its consistency with other nearby tide gauge datasets. Using our new corrected dataset, we estimate a rate of 1.08 mm/yr sea level rise at Dublin Port between 1953–2016 (95 % CI from 0.62 to 1.55 mm/yr), and a rate of 6.48 mm/yr between 1997–2016 (95 % CI 4.22 to 8.80 mm/yr). Overall sea level rise is in line with expected trends but large multidecadal varaibility has led to higher rates of rise in recent years.

Amin Shoari Nejad et al.

Status: open (until 06 Dec 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on os-2021-92', Philip Woodworth, 18 Oct 2021 reply

Amin Shoari Nejad et al.

Amin Shoari Nejad et al.

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Short summary
We have collated multiple sources of tide gauge data for Dublin Port, and subsequently corrected them for bias. We have then shown that these corrected mean sea level measurements agree with nearby tide gauges to a far higher degree than the raw data. A longer term comparison with Brest and Newlyn also indicates overall agreement. Our final adjusted dataset estimated the rate of sea level rise to be 1.08 mm/yr between 1953 and 2016, and 6.48 mm/yr between 1997 and 2016 at Dublin Port.