4DEMON: 4 decades of metals and PCBs concentrations in sediment at the Belgian Part of the North Sea

Assessment of historical data is important for understanding long-term changes in the quality of the marine environment. Within the 4Demon-project, 40 years of historical monitoring and research data on PCBs and metals in sediment in the Belgian part of the North Sea was compiled and quality checked within this dataset to support studies on normalization and long time trends modelling.