Volta

Observational uncertainties on past and future sea level rise for Marseille and Brest tide gauges

Brest and Marseille tide gauges time series between 1885 and 2022 data gaps are filled with data from neighboring tide gauges thanks to a combination model that does not alter original trends. Continuous relative sea level time series obtained from this step are then corrected from the inverse barometer effect and/or periodic components. Time series are systematically explored to form all possible sub-time series, from 20 years length to the full time span, and adjusted with linear and quadratic fits. It is shown that corrections have various effect on parameters best estimates, depending on the chosen period, and that they reduce uncertainties on estimated parameters; corrections schemes comparison and correlation with climate indices suggest the influence of the Northern Atlantic …

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