Atmospheric reactive nitrogen concentration and deposition trends from 2011 to 2018 at an urban site in north China
文献类型： 外文期刊
作者： Luo, Xiaosheng 1 ; Liu, Xuejun 2 ; Pan, Yuepeng 3 ; Wen, Zhang 2 ; Xu, Wen 2 ; Zhang, Lin 4 ; Kou, Changlin 1 ; Lv, Jinli 1 ;
作者机构： 1.Henan Acad Agr Sci, Inst Plant Nutr Resources & Environm Sci, Henan Key Lab Agr Ecoenvironm, Zhengzhou 450002, Peoples R China
2.China Agr Univ, Natl Acad Agr Green Dev, Coll Resources & Environm Sci, Sch Agr Green Dev, Beijing 100193, Peoples R China
3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
4.Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & Ocean Atmosphere Studies, Beijing 100871, Peoples R China
5.Rothamsted Res, Sustainable Agr Sci Dept, Harpenden AL5 2JQ, Herts, England
关键词： Atmospheric reactive nitrogen; Yearly variation; Long-term observation; N deposition; Ammonia
期刊名称：ATMOSPHERIC ENVIRONMENT （ 影响因子：4.798； 五年影响因子：5.295 ）
ISSN： 1352-2310
年卷期： 2020 年 224 卷
页码：
收录情况： SCI
摘要： Atmospheric reactive nitrogen (Nr) emissions and deposition have caused much damage to the global environment and also impacted human health. Determining long-term trends in atmospheric Nr concentrations and deposition is important for evaluating air quality and ecosystem effects and formulating control measures to reduce negative impacts. We measured monthly concentrations of NH3, pNH(4)(+), HNO3, pNO(3)(-), and NO2 and calculated their dry deposition rates using an inferential method from 2011 to 2018 at an urban site in Zhengzhou in the North China Plain. Inorganic N (NH4+ and NO3) concentrations in precipitation and wet/bulk N deposition were also quantified in 2011, 2016, 2017 and 2018. The results showed high concentrations of atmospheric Nr species, with considerable variation in some species over the monitoring period. Annual mean NH3 concentrations significantly increased from 2011 to 2018 (p < 0.001) with that in 2018 being twice that in 2011. However, pNO(3)(-) and pNH(4)(+) concentrations decreased after 2013. The annual mean NO2 concentration in 2018 had decreased by 33.4% compared to the peak in 2011. Highest NH3 concentrations were measured in spring or summer, and lowest concentrations in winter. pNH(4)(+) and pNO(3)(-) concentrations peaked mainly in winter. Total annual dry N deposition ranged from 21.9 to 41.2 kg N ha(-1). Bulk NH4+ and NO3 deposition was lower in 2016-2018 than in 2011. However, atmospheric Nr concentrations and N deposition remained high in this urban ecosystem. NH3 emissions urgently need control measures, and Nr impacts on the surrounding ecosystems and human health should be considered. Continuous long-term measurements of atmospheric Nr concentrations and deposition at a regional scale are necessary to help formulate emission control measures and protect human and ecosystem health.
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