The role of salinity in shaping dissolved inorganic nitrogen and N2O dynamics in estuarine sediment-water interface

► We studied the influence of salinity on estuarine sediment inorganic N dynamics. ► No widespread salinity effect was noted in NO3- and NO2- dynamics. ► In the upper estuaries, N2O production was stimulated by salinity increases. ► Salinization of estuaries could exacerbate N2O production and global warming.