A global picture of the age structure and flow path of groundwater is lacking. Tritium concentrations and numerical modelling shed light on both the most recently replenished and the longest stored groundwater within Earth's continents.
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Fan, Y. How much and how old?. Nature Geosci 9, 93–94 (2016). https://doi.org/10.1038/ngeo2609
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DOI: https://doi.org/10.1038/ngeo2609
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