Meridional variability of the vertical structure and air-sea fluxes of N2O off central Chile (30-40°S)

► We study the meridional N2O distribution along the central Chilean coast. ► Topography and freshwater contribution determine the surface N2O concentrations. ► Increasing width of continental shelf increases the surface N2O. ► Increasing freshwater contribution from the continent decreases the surface N2O. ► Thickness of the Oxygen Minimum Zone has an influence over the surface N2O.