Atmospheric Chemistry and Physics Wet and dry deposition of atmospheric nitrogen at ten sites in

Abstract. Emissions of reactive nitrogen (N) species can affect surrounding ecosystems via atmospheric deposition. However, few long-term and multi-site measurements have focused on both the wet and the dry deposition of individual N species in large areas of Northern China. Thus, the magni-tude of atmospheric deposition of various N species in North-ern China remains uncertain. In this study, the wet and dry at-mospheric deposition of different N species was investigated during a three-year observation campaign at ten selected sites in Northern China. The results indicate that N deposition levels in Northern China were high with a ten-site, three-year average of 60.6 kg N ha−1 yr−1. The deposition levels showed spatial and temporal variation in the range of 28.5– 100.4 kg N ha−1 yr−1. Of the annual total deposition, 40 % was deposited via precipitation, and the remaining 60 % wa