DOI: 10.1038/s41558-019-0665-8
论文题名: Increased global nitrous oxide emissions from streams and rivers in the Anthropocene
作者: Yao Y. ; Tian H. ; Shi H. ; Pan S. ; Xu R. ; Pan N. ; Canadell J.G.
刊名: Nature Climate Change
ISSN: 1758678X
出版年: 2020
卷: 10, 期: 2 语种: 英语
英文摘要: Emissions of nitrous oxide (N2O) from the world’s river networks constitute a poorly constrained term in the global N2O budget1,2. This N2O component was previously estimated as indirect emissions from agricultural soils3 with large uncertainties4–10. Here, we present an improved model representation of nitrogen and N2O processes of the land–ocean aquatic continuum11 constrained with an ensemble of 11 data products. The model–data framework provides a quantification for how changes in nitrogen inputs (fertilizer, deposition and manure), climate and atmospheric CO2 concentration, and terrestrial processes have affected the N2O emissions from the world’s streams and rivers during 1900–2016. The results show a fourfold increase of global riverine N2O emissions from 70.4 ± 15.4 Gg N2O-N yr−1 in 1900 to 291.3 ± 58.6 Gg N2O-N yr−1 in 2016, although the N2O emissions started to decline after the early 2000s. The small rivers in headwater zones (lower than fourth-order streams) contributed up to 85% of global riverine N2O emissions. Nitrogen loads on headwater streams and groundwater from human activities, primarily agricultural nitrogen applications, play an important role in the increase of global riverine N2O emissions. © 2019, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159564
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: International Center for Climate and Global Change Research, School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL, United States; Global Carbon Project, CSIRO Oceans and Atmosphere, Canberra, ACT, Australia
Recommended Citation:
Yao Y.,Tian H.,Shi H.,et al. Increased global nitrous oxide emissions from streams and rivers in the Anthropocene[J]. Nature Climate Change,2020-01-01,10(2)