Dry and Bulk Nitrogen Deposition in Suburbs of Xining City

• Published in: Huanjing kexue Vol. 38; no. 4; p. 1279
• Main Authors: Xu, Wen, Jin, Xin, Luo, Shao-Hui, Feng, Zhao-Zhong, Zhang, Lin, Pan, Yue-Peng, Liu, Xue-Jun
• Format: Journal Article
• Language: Chinese
• Published: China 08.04.2017
• Subjects: Tibetan Plateau; atmospheric reactive N; suburban area; dry deposition; wet deposition
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.201609237

This study conducted a full two-year (2014 and 2015) measurements of dry and bulk deposition of atmospheric inorganic nitrogen (N) at the suburb of Xining city, Qinghai province. Dry N deposition fluxes were calculated by multiplying the atmospheric concentrations of NH and NO measured using passive samplers with the modeled dry deposition velocities provided by the GEOS-Chem global chemical transport model, while bulk N deposition fluxes were measured using precipitation gauge. Annual mean concentrations of gaseous NH and NO averaged 8.8 and 19.6 μg·m , respectively, with significantly higher values in 2015 than in 2014. Seasonal mean NH concentrations were higher in spring and summer than in autumn and winter, but the concentrations of NO changed little from season to season, with a small peak in autumn. Annual mean concentrations of NH -N and NO -N in precipitation averaged 2.2 and 1.8 mg·L , respectively. Concentrations of NH -N in autumn were~55% lower than those in other seasons, whereas those of NO -N