DOI: 10.1111/gcb.13198
论文题名: Quantifying the erosion effect on current carbon budget of European agricultural soils at high spatial resolution
作者: Lugato E. ; Paustian K. ; Panagos P. ; Jones A. ; Borrelli P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 5 起始页码: 1976
结束页码: 1984
语种: 英语
英文关键词: Coupled erosion-SOC models
; Erosion
; European Union
; Lateral C fluxes
; Soil organic carbon
Scopus关键词: agricultural soil
; carbon budget
; carbon cycle
; carbon dioxide
; carbon emission
; carbon flux
; carbon sink
; European Union
; soil carbon
; soil erosion
; spatial resolution
; carbon
; carbon dioxide
; soil
; agriculture
; carbon cycle
; chemistry
; environmental monitoring
; Europe
; soil
; theoretical model
; Agriculture
; Carbon
; Carbon Cycle
; Carbon Dioxide
; Environmental Monitoring
; Europe
; Models, Theoretical
; Soil
英文摘要: The idea of offsetting anthropogenic CO2 emissions by increasing global soil organic carbon (SOC), as recently proposed by French authorities ahead of COP21 in the 'four per mil' initiative, is notable. However, a high uncertainty still exits on land C balance components. In particular, the role of erosion in the global C cycle is not totally disentangled, leading to disagreement whether this process induces lands to be a source or sink of CO2. To investigate this issue, we coupled soil erosion into a biogeochemistry model, running at 1 km2 resolution across the agricultural soils of the European Union (EU). Based on data-driven assumptions, the simulation took into account also soil deposition within grid cells and the potential C export to riverine systems, in a way to be conservative in a mass balance. We estimated that 143 of 187 Mha have C erosion rates <0.05 Mg C ha-1 yr-1, although some hot-spot areas showed eroded SOC >0.45 Mg C ha-1 yr-1. In comparison with a baseline without erosion, the model suggested an erosion-induced sink of atmospheric C consistent with previous empirical-based studies. Integrating all C fluxes for the EU agricultural soils, we estimated a net C loss or gain of -2.28 and +0.79 Tg yr-1 of CO2eq, respectively, depending on the value for the short-term enhancement of soil C mineralization due to soil disruption and displacement/transport with erosion. We concluded that erosion fluxes were in the same order of current carbon gains from improved management. Even if erosion could potentially induce a sink for atmospheric CO2, strong agricultural policies are needed to prevent or reduce soil erosion, in order to maintain soil health and productivity. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61413
Appears in Collections: 影响、适应和脆弱性
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作者单位: European Commission, Joint Research Centre, Institute for Environment and Sustainability, Via E. Fermi, Ispra (VA), Italy; Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Lugato E.,Paustian K.,Panagos P.,et al. Quantifying the erosion effect on current carbon budget of European agricultural soils at high spatial resolution[J]. Global Change Biology,2016-01-01,22(5)