DOI: 10.1111/gcb.13178
论文题名: Soil carbon sequestration and biochar as negative emission technologies
作者: Smith P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 3 起始页码: 1315
结束页码: 1324
语种: 英语
英文关键词: Biochar
; Carbon
; Negative emission technology
; Sequestration
; Soil
Scopus关键词: air pollutant
; biochar
; charcoal
; soil
; air pollutant
; analysis
; carbon sequestration
; chemistry
; climate
; climate change
; environmental monitoring
; greenhouse effect
; soil
; Air Pollutants
; Carbon Sequestration
; Charcoal
; Climate
; Climate Change
; Environmental Monitoring
; Greenhouse Effect
; Soil
英文摘要: Despite 20 years of effort to curb emissions, greenhouse gas (GHG) emissions grew faster during the 2000s than in the 1990s, which presents a major challenge for meeting the international goal of limiting warming to <2 °C relative to the preindustrial era. Most recent scenarios from integrated assessment models require large-scale deployment of negative emissions technologies (NETs) to reach the 2 °C target. A recent analysis of NETs, including direct air capture, enhanced weathering, bioenergy with carbon capture and storage and afforestation/deforestation, showed that all NETs have significant limits to implementation, including economic cost, energy requirements, land use, and water use. In this paper, I assess the potential for negative emissions from soil carbon sequestration and biochar addition to land, and also the potential global impacts on land use, water, nutrients, albedo, energy and cost. Results indicate that soil carbon sequestration and biochar have useful negative emission potential (each 0.7 GtCeq. yr-1) and that they potentially have lower impact on land, water use, nutrients, albedo, energy requirement and cost, so have fewer disadvantages than many NETs. Limitations of soil carbon sequestration as a NET centre around issues of sink saturation and reversibility. Biochar could be implemented in combination with bioenergy with carbon capture and storage. Current integrated assessment models do not represent soil carbon sequestration or biochar. Given the negative emission potential of SCS and biochar and their potential advantages compared to other NETs, efforts should be made to include these options within IAMs, so that their potential can be explored further in comparison with other NETs for climate stabilization. © 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/61465
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Institute of Biological and Environmental Sciences, Scottish Food Security Alliance-Crops and ClimateXChange, University of Aberdeen, 23 St Machar Drive, Aberdeen, United Kingdom
Recommended Citation:
Smith P.. Soil carbon sequestration and biochar as negative emission technologies[J]. Global Change Biology,2016-01-01,22(3)