Dataset for the article "Nitrous oxide source–sink dynamics along redox gradients in fjords worldwide"

This repository contains a compiled dataset based on original observations of nitrous oxideacross 14 fjords in five countries, collected during seven research expeditions conducted between April 2023 and July 2025. Sampling included water column profiles, intact sediment cores, and river water samples, covering gradients from inner to outer fjord systems under multiple seasonal conditions. Measurements comprise N₂O concentrations and saturations, dissolved nutrients, sediment–water fluxes, air–sea gas exchange, and various environmental parameters obtained through standardized field sampling and incubation experiments. This dataset was used to generate the figures presented in the article and to perform all statistical analyses.