Sprenger, MatthiasTetzlaff, DoertheButtle, JimLaudon, HjalmarSoulsby, Chris2018-08-142018-08-142018-07-20Sprenger, M, Tetzlaff, D, Buttle, J, Laudon, H & Soulsby, C 2018, 'Water ages in the critical zone of long-term experimental sites in northern latitudes', Hydrology and Earth System Sciences, vol. 22, no. 7, pp. 3965-3981. https://doi.org/10.5194/hess-22-3965-20181027-5606http://hdl.handle.net/2164/10896We thank Pernilla Löfvenius (SLU) for providing PET data for Krycklan (via SITES) and Carl Mitchell for snowmelt data in Dorset. We thank Pertti Ala-aho, Paolo Benettin, Sylvain Kuppel, Aaron A. Smith, and Hailong Wang for constructive discussions on the topic. The authors would like to acknowledge the support of the Maxwell computing cluster funded by the University of Aberdeen. The Krycklan component of the study was funded by the KAW Branch-Point project. We thank the European Research Council (ERC, project GA 335910 VeWa) for funding. We acknowledge support by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin. We thank Todd Walter and two anonymous referees for their critical comments to improve the manuscript. Data availability. The underlaying research data are not publicly available in a repository, as they contain 70 GB. However, they can be requested from the authors175990098engSDG 13 - Climate ActionSDG 15 - Life on LandTRANSIT-TIME DISTRIBUTIONSBOREAL HEADWATER CATCHMENTRESOLUTION ISOTOPE DATASOIL-WATERSTABLE-ISOTOPESRESIDENCE TIMESRUNOFF GENERATIONUNSATURATED ZONESTORAGE DYNAMICSTRACERQE GeologyEuropean Research CouncilGA 335910 VEWAQEJournal article10.5194/hess-22-3965-2018227