High concentrations and dry deposition of reactive nitrogen species at two sites in the North China Plain

Publikations-Art

Zeitschriftenbeitrag (peer-reviewed)

Autoren

Shen, J.L., Tang, A.H., Liu, X.J., Fangmeier, A., Goulding, K.T.W., Zhang, F.S.

Erscheinungsjahr

2009

Veröffentlicht in

Environmental Pollution

Seite (von - bis)

3106-3113

Atmospheric concentrations of major reactive nitrogen (N_r) species were quantified using passive samplers, denuders, and particulate samplers at Dongbeiwang and Quzhou, North China Plain (NCP) in a two-year study. Average concentrations of NH₃, NO₂, HNO₃, pNH₄⁺ and pNO₃^- were 12.0, 12.9, 0.6, 10.3, and 4.7 μg N m^-3 across the two sites, showing different seasonal patterns of these N_r species. For example, the highest NH₃ concentration occurred in summer while NO₂ concentrations were greater in winter, both of which reflected impacts of N fertilization (summer) and coal-fueled home heating (winter). Based on measured N_r concentrations and their deposition velocities taken from the literature, annual N dry deposition was up to 55 kg N ha^-1. Such high concentrations and deposition rates of N_r species in the NCP indicate very serious air pollution from anthropogenic sources and significant atmospheric N input to crops.