title: A Review of Spatial Variation of Inorganic Nitrogen (N) Wet Deposition in China.
abstract: Atmospheric nitrogen (N) deposition (Ndep), an important component of the global N cycle, has increased sharply in recent decades in China. Although there were already some studies on Ndep on a national scale, there were some gaps on the magnitude and the spatial patterns of Ndep. In this study, a national-scale Ndep pattern was constructed based on 139 published papers from 2003 to 2014 and the effects of precipitation (P), energy consumption (E) and N fertilizer use (FN) on spatial patterns of Ndep were analyzed. The wet deposition flux of NH4(+)-N, NO3(-)-N and total Ndep was 6.83, 5.35 and 12.18 kg ha(-1) a(-1), respectively. Ndep exhibited a decreasing gradient from southeast to northwest of China. Through accuracy assessment of the spatial Ndep distribution and comparisons with other studies, the spatial Ndep distribution by Lu and Tian and this study both gained high accuracy. A strong exponential function was found between P and Ndep, FN and Ndep and E and Ndep, and P and FN had higher contribution than E on the spatial variation of Ndep. Fossil fuel combustion was the main contributor for NO3(-)-N (86.0%) and biomass burning contributed 5.4% on the deposition of NO3(-)-N. The ion of NH4(+) was mainly from agricultural activities (85.9%) and fossil fuel combustion (6.0%). Overall, Ndep in China might be considerably affected by the high emissions of NOx and NH3 from fossil fuel combustion and agricultural activities.
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, 210023, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, 210023, China.
authors.forename: Xiuying
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, 210023, China.
authors.forename: Shanqian
authors.initials: S
authors.lastname: Wang
authors.affiliation: Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing, 210023, China.|Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China.
authors.forename: Xuehe
authors.initials: X
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100101, China.
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Ouyang
mesh_terms: D000383:Agriculture; D000393:Air Pollutants / Q000032:analysis*; D018533:Biomass; D002681:China; D004784:Environmental Monitoring; D005308:Fertilizers / Q000032:analysis; D005579:Fossil Fuels / Q000032:analysis; D009584:Nitrogen / Q000032:analysis*; D058458:Nitrogen Cycle; D062206:Spatial Analysis
chemical_list: D000393:Air Pollutants; D005308:Fertilizers; D005579:Fossil Fuels; D009584:Nitrogen