The isotopic composition of dissolved dinitrogen gas (δ15N‐N2) in water can offer a powerful constraint on the sources and pathways of nitrogen cycling in aquatic systems. However, because of the… Click to show full abstract
The isotopic composition of dissolved dinitrogen gas (δ15N‐N2) in water can offer a powerful constraint on the sources and pathways of nitrogen cycling in aquatic systems. However, because of the large presence of atmosphere‐derived dissolved N2 in these systems, high‐precision (on the order of 0.001‰) measurements of N2 isotopes paired with inert gas measurements are required to disentangle atmospheric and biogeochemical signals. Additionally, the solubility equilibrium isotope fractionation of N2 and its temperature and salinity dependence are underconstrained at this level of precision.
Journal Title: Rapid Communications in Mass Spectrometry
Year Published: 2025
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