Florent Barbecot

1 Introduction Dissolved gases, especially noble gases, are often used as both environmental and artificial tracers to study the hydro-geosphere [1-10]. For example, groundwater dating often rely on the determination of dissolved gas contents.

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1 INTRODUCTION Over the past decades, stable isotopes of the water molecule have emerged as powerful tracers that have transformed our understanding of the hydrological cycle across spatial and temporal scales.1, 2 Their distribution in precipitation is an exceptional source of information on the conditions and trajectories of meteorological events.3-5 They have great potential to trace the partitioning of rainfall along different flow paths and to identify surface water sources.6...