Radiational tides and forecasting storm surges
| Autor: | Hibbert, A., Williams, J., Gomez, B., O Neill, C., Saulter, A., Sansom, J., Staley, P. |
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| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-2479 |
| Popis: | In the UK, Coastal Flood Forecasting procedures rely on forecasts of still water level generated by combining predicted tide and storm surge components. The tide component of this system is often termed the ‘astronomic tide’. However, the predicted tide is derived from a harmonic analysis of the full water level time-series (tide plus surge) observed at tide gauges – typically from the last 19 years. Therefore, the tidal predictions will include radiational tides particularly those that occur with tidal frequencies such as S2 and Sa.We have previously shown that the current forecasting system double-counts several cm of tides from these sources, since the radiational tides are also generated by the surge model. Now we investigate further, to see whether removing a modelled surge prior to tidal analysis and prediction can improve total water level forecasting. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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