Output details

Global influences of the 18.61 year nodal cycle and 8.85 year cycle of lunar perigee on high tidal levels

Significance of output:

Extreme sea levels are often viewed in the context of storm surges, but the impacts of storm events in many areas are strongly modulated by the tide. This paper for the first time mapped the influence of important inter-annual cycles in tides on a global scale. An assessment of when these modulations occur allows us to predict periods when there is likely to be an enhanced risk of coastal flooding and erosion in different parts of the world. Results have been used by coastal managers to assess past changes in the rates of coastal erosion in Australia and South Africa.