DOI: 10.1016/j.atmosenv.2014.12.054
Scopus记录号: 2-s2.0-84920624471
论文题名: Effect of dissolved oxygen and nitrogen on emission of N2O from rivers in China
作者: Wang J ; , Chen N ; , Yan W ; , Wang B ; , Yang L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 103 起始页码: 347
结束页码: 356
语种: 英语
英文关键词: Dissolved oxygen
; Emission factor
; Nitrogen level
; Nitrous oxide
Scopus关键词: Agricultural runoff
; Dissolution
; Dissolved oxygen
; Grain (agricultural product)
; Nitrogen
; Nitrogen oxides
; Oxygen
; Regression analysis
; Emission factors
; Negative correlation
; Nitrogen levels
; Nitrous oxide
; Oxygen and nitrogens
; Positive correlations
; Stepwise regression analysis
; Temporal and spatial variation
; Rivers
; dissolved oxygen
; nitrogen
; nitrous oxide
; runoff
; agricultural runoff
; concentration (composition)
; dissolved oxygen
; effluent
; emission control
; nitrogen dioxide
; regression analysis
; river
; spatiotemporal analysis
; urban pollution
; watershed
; Article
; atmosphere
; China
; circadian rhythm
; correlational study
; dynamics
; human
; river
; seasonal variation
; watershed
; China
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Six rivers from three watersheds in China were chosen to study the temporal and spatial variations in nitrous oxide (N2O) concentrations and emissions in order to examine the link between N2O production and dissolved oxygen (DO) and nitrogen levels. These rivers can generally be divided into two types: runoff rivers with significant natural and agricultural runoff, and urban rivers with significant urban effluents. The results showed that N2O concentrations were 0.15-1.07 (mean 0.51) and 0.22-22.7 (mean 4.10) ugNL-1 in runoff rivers and an urban river, respectively. N2O was oversaturated in almost all the rivers, suggesting that the rivers were sources of atmospheric N2O. N2O emissions in the urban river (range from 1.53 to 2453, mean 529ugNm-2h-1) were significantly higher than those in runoff rivers (range from 0.51 to 80.9, mean 18.0ugNm-2h-1). We found a significant positive correlation of N2O production with NO3- (r2=0.30, p<0.001) and a negative correlation of N2O production with DO concentrations (r2=0.22, p<0.001) in runoff rivers. Particularly, there existed a significant positive relationship (r2=0.21, p<0.001) between NH4+ and N2O production in an urban river. By using stepwise regression analysis, we found N2O production can be predicted by the dynamics of DO and N levels: for runoff rivers, NO3- and DO explained 47% variability in N2O production, while for the urban river, NH4+ and DO explained 64% variability in N2O production. We suggest that the IPCC method to calculate N2O emission factors should be revised in view of the importance of these multiple factors. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81999
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Key Laboratory of the Coastal and Wetland Ecosystems, Ministry of Education, Xiamen University, Xiamen, China; Chinese Academy for Environmental Planning, Beijing, China; Municipal Bureau of Land-Environment and Resources, Sanya City, Hainan Province, China
Recommended Citation:
Wang J,, Chen N,, Yan W,et al. Effect of dissolved oxygen and nitrogen on emission of N2O from rivers in China[J]. Atmospheric Environment,2015-01-01,103