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Fig. 6. (A) Average water age with mixing compared to reconstructed
15N[NO3–]0. Values of
15N are given with respect to air N2, in parts per thousand. (B) Average water age with mixing compared to [NO3–]0. (C) Average water age with mixing compared to denitrification progress,
denit. Lines are least squares regressions to the data from the California transect, and the N23 and N21 well clusters at Nebraska. (D) Average water age with mixing versus dissolved O2.