DOI: 10.1016/j.atmosenv.2014.09.005
Scopus记录号: 2-s2.0-84907164139
论文题名: Inorganic nitrogen deposition in China's forests: Status and characteristics
作者: Du E ; , Jiang Y ; , Fang J ; , de Vries W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 98 起始页码: 474
结束页码: 482
语种: 英语
英文关键词: Ammonium:nitrate ratio
; Dry deposition
; Enrichment ratio
; Nitrogen deposition
; Throughfall
; Urban hotspot hypothesis
Scopus关键词: Ammonium:nitrate ratio
; Dry deposition
; Enrichment ratio
; Hot spot
; Nitrogen deposition
; Throughfall
; ammonia
; ammonium nitrate
; nitrate
; nitrogen
; tin
; ammonium
; atmospheric pollution
; critical load
; dry deposition
; forest ecosystem
; inorganic nitrogen
; nitrate
; throughfall
; Article
; canopy
; carbon sequestration
; dry deposition
; environmental parameters
; forest
; forest stand
; hypothesis
; nitrogen deposition
; wet deposition
; 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: Nitrogen (N) deposition in China has been dramatically enhanced by anthropogenic emissions and has aroused great concerns of its impacts on forest ecosystems. This study synthesized data on ammonium (NH4 +) and nitrate (NO3 -) contents in bulk precipitation and throughfall from 38 forest stands in published literature to assess the status and characteristics of N deposition to typical forests in China between 1995 and 2010. Our results showed that ammonium dominated N deposition in this period, with a mean NH4 +-N:NO3 --N ratio of ~2.5 in bulk deposition and throughfall. Mean throughfall N deposition in China's forests was as high as 14.0 kg N ha-1 yr-1 for ammonium, 5.5 kg N ha-1 yr-1 for nitrate and 21.5 kg N ha-1 yr-1 for total inorganic N (TIN), respectively. Mean bulk deposition was 9.4 kg N ha-1 yr-1 for ammonium, 3.9 kg N ha-1 yr-1 for nitrate and 14.0 kg N ha-1 yr-1 for TIN, respectively. Canopy captured dry deposition, calculated as the difference between throughfall and bulk deposition, was thus approximately half of the bulk deposition. Spatial patterns of N deposition were in accordance with our urban hotspot hypothesis, showing a strong power-law reduction of ammonium with increasing distance to large cities but only slightly lower nitrate deposition. Our results suggest that high N deposition, especially of ammonium, exceeds critical N loads for large areas of China's forests. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80625
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, Xinjiekouwai Street 19#, Beijing, China; Department of Ecology, College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Yiheyuan Road 5#, Beijing, China; Environmental Systems Analysis Group, Wageningen University, PO Box 47, Wageningen, Netherlands
Recommended Citation:
Du E,, Jiang Y,, Fang J,et al. Inorganic nitrogen deposition in China's forests: Status and characteristics[J]. Atmospheric Environment,2014-01-01,98