
ALT A location map of tide gauges from the PSMSL database. Each dot is a tide gauge location, the color showing the last year for which there is data (see the color bars) and the size of the dot representing the length of the record. Bigger dots are longer records. The tide gauges in the blue rectangle were used to create the accompanying time series ensemble of relative sea level along the coast of Germany and east coast of Holland.

ALT A time series chart of 12 long term tide gauges monthly data along the German and east Holland coasts. The 12 tide gauges are denoted by different colors, the dots being the actual monthly anomaly for sea level and the colored traces being a 12 month running mean smooth of the monthly anomalies. The black trace is an ensemble created from the monthly anomalies, from 1850 to 2025. The chart shows sea level rising at about 1.8 mm/year from 1850 to 1930, then rising about 1.0 mm/year from 1930 to 1980 and then 1.5 mm/year from 1980 to 2016.

























