Articles | Volume 16, issue 3
Ocean Sci., 16, 703–714, 2020

Special issue: Developments in the science and history of tides (OS/ACP/HGSS/NPG/SE...

Ocean Sci., 16, 703–714, 2020

Research article 12 Jun 2020

Research article | 12 Jun 2020

Are tidal predictions a good guide to future extremes? – a critique of the Witness King Tides project

John Hunter

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Cited articles

Cartwright, D. E.: Tidal prediction and modern time scales, Int. Hydrogr. Rev., 62, 127–138, 1985. a
Huthnance, J.: Physical oceanography of the North Sea, Ocean and Shoreline Management, 16, 199–231, 1991. a
Moftakhari, H. R., AghaKouchak, A., Sanders, B. F., Feldman, D. L., Sweet, W., Matthew, R. A., and Luke, A.: Increased nuisance flooding along the coasts of the United States due to sea level rise: Past and future, Geophys. Res. Lett., 42, 9846–9852,, 2015. a
Moftakhari, H. R., AghaKouchak, A., Sanders, B. F., Allaire, M., and Matthew, R.: What is nuisance flooding? Defining and monitoring an emerging challenge, Water Resour. Res., 54, 4218–4227,, 2018. a
Press, W. H., Teukolsky, S. A., Vetterling, W. T., and Flannery, B. P.: Numerical Recipes 3rd Edition: The Art of Scientific Computing, Cambridge University Press, New York, NY, USA, 3 edn., 2007. a
Short summary
Witness King Tides (WKT) is a citizen-science project collecting photos of the shoreline at the time of highest predicted tide each year, with the aim of indicating the flooding that may occur routinely with sea-level rise. However, effects such as storm surges may affect the results, leading to significantly lower tides than expected. Tidal observations from the GESLA-2 global database are analysed to indicate regions of the world where WKT should perform well and others where it would not.