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Changes of nitrogen deposition in China from 1980 to 2018

文献类型： 外文期刊

作者： Wen, Zhang 1 ; Xu, Wen 1 ; Li, Qi 1 ; Han, Mengjuan 1 ; Tang, Aohan 1 ; Zhang, Ying 1 ; Luo, Xiaosheng 2 ; Shen, Jianlin; 1 ;

作者机构： 1.China Agr Univ, Natl Acad Agr Green Dev, Coll Resources & Environm Sci, Key Lab Plant Soil Interact MOE, Beijing 100193, Peoples R China

2.Henan Acad Agr Sci, Inst Plant Nutr Resources & Environm Sci, Zhengzhou 450002, Peoples R China

3.Chinese Acad Sci, Inst Subtrop Agr, Changsha 410125, Peoples R China

4.Xizang Agr & Anim Husb Coll, Nyingchi 860000, TN, Peoples R China

5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China

6.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China

7.Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Lab Climate & OceanAtmosphere Studies, Beijing 100871, Peoples R China

8.Fujian Inst Tobacco Agr Sci, Fuzhou 350003, Peoples R China

9.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA

10.Jinan Univ, Inst Environm & Climate Res, Guangzhou 510632, Peoples R China

11.Rothamsted Res, Sustainable Agr Sci Dept, Harpenden AL5 2JQ, Herts, England

关键词： Reactive nitrogen; Atmospheric deposition; Ammonia; Air pollution; Emission control

期刊名称：ENVIRONMENT INTERNATIONAL （ 影响因子：9.621； 五年影响因子：10.72 ）

ISSN： 0160-4120

年卷期： 2020 年 144 卷

页码：

收录情况： SCI

摘要： China has experienced a dramatic change in atmospheric reactive nitrogen (Nr) emissions over the past four decades. However, it remains unclear how nitrogen (N) deposition has responded to increases and/or decreases in Nr emissions. This study quantitatively assesses temporal and spatial variations in measurements of bulk and calculated dry N deposition in China from 1980 to 2018. A long-term database (1980-2018) shows that bulk N deposition peaked in around 2000, and had declined by 45% by 2016-2018. Recent bulk and dry N deposition (based on monitoring from 2011 to 2018) decreased from 2011 to 2018, with current average values of 19.4 +/- 0.8 and 20.6 +/- 0.4 kg N ha(-1) yr-(1,) respectively. Oxidized N deposition, especially dry deposition, decreased after 2010 due to NOx emission controls. In contrast, reduced N deposition was approximately constant, with reductions in bulk NH4+-N deposition offset by a continuous increase in dry NH3 deposition. Elevated NH3 concentrations were found at nationwide monitoring sites even at urban sites, suggesting a strong influence of both agricultural and non-agricultural sources. Current emission controls are reducing Nr emissions and deposition but further mitigation measures are needed, especially of NH3, built on broader regional emission control strategies.

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