“…This result is supported by the sample taken from the 'untere Moorerdebank' on Langeoog (Hv 1998) between + 1.53 and + 1.58 m, which yielded an age from 1125 to 1395 AD. This second group of Comparison of these geological sea-level dates with the evaluation of historical records of stormsurge levels and tide gauge observations published by Rohde (1975Rohde ( and 1985 permits the following conclusions to be drawn. Tide gauge measurements, available from the German North Sea coast for the last 150 years, yielded an average rise of mean high-tide level and storm-surge level of25 em per century.…”