From 2007 to 2010 I was the lead investigator of the AMSeL project (Mean sea level and tidal analysis along the German North Sea coastline) at the University of Siegen. It was funded by the Federal Ministry of Education and Research (BMBF) for a period of three years. In this project we collected historical sea level data from a variety of sources, quality checked the time series, and reconstructed long and high-quality mean seal level time series for 13 tide gauges along the German North Sea coastline. The data sets were then analyzed with advanced filter techniques to quantify long-term trends, multi-decadal variations, and acceleration patterns. The data set has since then be used for numerous studies in the same area (see publication list). More information can be found on the project website and in the final report (in German) here.