Fig. 5: The age of baseflow grows with time, in part because groundwater storage is generally ageing. | Nature Geoscience

Fig. 5: The age of baseflow grows with time, in part because groundwater storage is generally ageing.

From: Warming and snow loss increase reliance on old groundwater in a Colorado River headwater

Fig. 5: The age of baseflow grows with time, in part because groundwater storage is generally ageing.

a, Median age of groundwater flux to streamflow through the 7-water-year period and for the different warming scenarios (see legend). During baseflow, the age of groundwater flux is nearly 2 years older at the end of the 7-year baseline period and up to 3 years older with 4.0 °C of warming. b, Corresponding annual trends of subsurface storage mean ages, with and without atmospheric warming.

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