Research data related to the article: A multi tracer approach reveals groundwater residence times and dynamic endmember mixing in the subterranean estuary of a high energy beach

Research data related to the article "A multi tracer approach reveals groundwater residence times and dynamic endmember mixing in the subterranean estuary of a high energy beach" authored by Meyer et al. (2026) published in Water Resources Research The data was collected on Spiekeroog island between 2022-2024 within the DynaDeep project (funded by DFG). The research data covers: Beach topographies measured with a differential GPS between 2014 and 2024. Logger data: recording water level, temperature and electrical conductivites at three mulitlevel wells in four depth. High resolution temperature time series recorded by SAMOS Hydraulic conductivities Groudwater sample data: groundwater ages, salinities, silica concentration