Global soil nitrous oxide emissions since the preindustrial era estimated by an ensemble of terrestrial biosphere models Magnitude, attribution, and uncertainty

Global soil nitrous oxide emissions since the preindustrial era estimated by an ensemble of terrestrial biosphere models : Magnitude, attribution, and uncertainty

© 2018 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 25(2019), 2 vom: 15. Feb., Seite 640-659
1. Verfasser: Tian, Hanqin (VerfasserIn)
Weitere Verfasser: Yang, Jia, Xu, Rongting, Lu, Chaoqun, Canadell, Josep G, Davidson, Eric A, Jackson, Robert B, Arneth, Almut, Chang, Jinfeng, Ciais, Philippe, Gerber, Stefan, Ito, Akihiko, Joos, Fortunat, Lienert, Sebastian, Messina, Palmira, Olin, Stefan, Pan, Shufen, Peng, Changhui, Saikawa, Eri, Thompson, Rona L, Vuichard, Nicolas, Winiwarter, Wilfried, Zaehle, Sönke, Zhang, Bowen
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. global nitrogen cycle greenhouse gas emission nitrous oxide process-based modeling soil N2O emission Air Pollutants Greenhouse Gases mehr... Soil Nitrous Oxide K50XQU1029
Beschreibung
Zusammenfassung:© 2018 John Wiley & Sons Ltd.
Our understanding and quantification of global soil nitrous oxide (N2 O) emissions and the underlying processes remain largely uncertain. Here, we assessed the effects of multiple anthropogenic and natural factors, including nitrogen fertilizer (N) application, atmospheric N deposition, manure N application, land cover change, climate change, and rising atmospheric CO2 concentration, on global soil N2 O emissions for the period 1861-2016 using a standard simulation protocol with seven process-based terrestrial biosphere models. Results suggest global soil N2 O emissions have increased from 6.3 ± 1.1 Tg N2 O-N/year in the preindustrial period (the 1860s) to 10.0 ± 2.0 Tg N2 O-N/year in the recent decade (2007-2016). Cropland soil emissions increased from 0.3 Tg N2 O-N/year to 3.3 Tg N2 O-N/year over the same period, accounting for 82% of the total increase. Regionally, China, South Asia, and Southeast Asia underwent rapid increases in cropland N2 O emissions since the 1970s. However, US cropland N2 O emissions had been relatively flat in magnitude since the 1980s, and EU cropland N2 O emissions appear to have decreased by 14%. Soil N2 O emissions from predominantly natural ecosystems accounted for 67% of the global soil emissions in the recent decade but showed only a relatively small increase of 0.7 ± 0.5 Tg N2 O-N/year (11%) since the 1860s. In the recent decade, N fertilizer application, N deposition, manure N application, and climate change contributed 54%, 26%, 15%, and 24%, respectively, to the total increase. Rising atmospheric CO2 concentration reduced soil N2 O emissions by 10% through the enhanced plant N uptake, while land cover change played a minor role. Our estimation here does not account for indirect emissions from soils and the directed emissions from excreta of grazing livestock. To address uncertainties in estimating regional and global soil N2 O emissions, this study recommends several critical strategies for improving the process-based simulations
Beschreibung:Date Completed 25.03.2019
Date Revised 28.07.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1365-2486
DOI:10.1111/gcb.14514