Figure 4: δ17O- versus δ18O-NO3− of Uinta Mountain water samples compared with the terrestrial fractionation line.
From: Agriculture causes nitrate fertilization of remote alpine lakes
Δ17O is the difference between the measured δ17O and the δ17O expected based on the terrestrial fractionation line (δ17O=0.52 × δ18O)56.
