SOURCES OF ATMOSPHERIC NITROGEN DEPOSITION IN AN ALPINE TUNDRA ENVIRONMENT (ITALY)

Atmospheric reactive nitrogen (Nr) deposition contributes to adverse impacts in freshwaters (e.g. N saturation and eutrophication), particularly of sensitive alpine ecosystems. Thus, studying the local and long-range emission NOx sources versus wet deposition is of critical importance. Here, we presented the results of a chemical and nitrate isotope survey in rain and snow samples collected in an alpine tundra located in the Italian Alps.