initiatives including ICES, SCOR, OSPAR and LTER North Sea time series Arctic time series AWI biological time series locations in the Arctic, North Sea and Antarctic Further information LTER-D LTER Europe [...] LTER time series in the North Sea, Arctic and Antarctic The analysis of long-term ecological patterns and changes is a further focus of AWI’s LTO activities and long-term data sets exist for almost every [...] sensor deployments and molecular methods. The most extensive data resources are available in our North Sea observatory. Further important time series are operated in the arctic observatory Hausgarten. Our