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Articles | Volume 16, issue 6
Articles | Volume 16, issue 6
https://doi.org/10.5194/os-16-1337-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/os-16-1337-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 6
Research article
 | 
09 Nov 2020
Research article |  | 09 Nov 2020

Bardsey – an island in a strong tidal stream: underestimating coastal tides due to unresolved topography

J. A. Mattias Green and David T. Pugh

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Latest update: 28 Oct 2025
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Short summary
Bardsey Island lies 3 km offshore the western end of the Llŷn Peninsula in northwestern Wales. However, the island is too small to show up in tidal databases based on satellite data, and thus they may not provide the correct local tides. Our new sea level data shows that the tidal currents in the satellite databases are one-third of the observed currents. Any investigation of other coastal activities, e.g. renewable energy installations, must use local observations to get the correct tides.
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Special issue
Developments in the science and history of tides (OS/ACP/HGSS/NPG/SE...