DOI: 10.1016/j.foreco.2016.02.014
Scopus记录号: 2-s2.0-84977930005
论文题名: Time-dependent global warming impact of tree stump bioenergy in Sweden
作者: Ortiz C.A. ; Hammar T. ; Ahlgren S. ; Hansson P.-A. ; Stendahl J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 371 起始页码: 5
结束页码: 14
语种: 英语
英文关键词: Bioenergy
; Dynamic modelling
; Forest fuel
; Global temperature
; LCA
; Stump harvest
Scopus关键词: Atmospheric radiation
; Climate change
; Dynamic models
; Fossil fuels
; Fuels
; Global warming
; Harvesting
; Life cycle
; Sensitivity analysis
; Timber
; Uncertainty analysis
; Bio-energy
; Commercial forestry
; Forest fuel
; Geographical locations
; Global temperatures
; Global warming impact
; Global warming potential
; Global-mean temperature
; Forestry
; alternative fuel
; anthropogenic effect
; bioenergy
; climate effect
; climate modeling
; decadal variation
; fossil fuel
; global warming
; harvesting
; life cycle analysis
; soil carbon
; temperature profile
; tree stump
; Sweden
; Picea
英文摘要: Tree stump harvesting could significantly increase the amount of bioenergy feedstock that forestry can supply to substitute for fossil alternatives. However, the climate mitigation potential of using stumps for bioenergy has been debated due to their often long residence time in the forest caused by slow decomposition. This study evaluated the climate effect over time of utilising stumps for bioenergy using ecosystem forest carbon modelling and time-dependent LCA methodology, including uncertainties in soil carbon changes. Different climate impact metrics were used (global mean temperature change, global warming potential and cumulative radiative forcing) and evaluations were made for single harvest as well as continuous supply over a landscape. Stump harvesting scenarios for spruce forests across Sweden were simulated and the forest net carbon balance was estimated as the difference compared with a reference scenario where the stumps were left to decompose in the forest.The results showed that using stump residues from commercial forestry in Sweden gives a climate benefit when they substitute for fossil fuel, even in a shorter perspective of around two decades. The temperature impact from using stumps for bioenergy at the stand level peaked after 10-15 years and then declined steadily to ~15% of the maximum level during the following 4-5 decades. The remaining long-term climate impact was small compared to using fossil fuel. An immediate climate benefit was achieved when replacing fossil coal, whereas the parity time, i.e. the time to reach climate benefit was 12-16 years (±2 years) when replacing natural gas, depending on geographical location. For continuous supply of stump bioenergy over a landscape, the corresponding parity time was 22-28 years. There was a higher impact on global climate for northern Sweden, although the absolute difference was small. Sensitivity analysis indicated a moderate additional climate warming effect from the soil disturbance caused by stump harvesting. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64932
Appears in Collections: 影响、适应和脆弱性
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作者单位: Statistics Sweden, Regions and Environment Department, Box 24300, Stockholm, Sweden; Department of Energy and Technology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden; Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden
Recommended Citation:
Ortiz C.A.,Hammar T.,Ahlgren S.,et al. Time-dependent global warming impact of tree stump bioenergy in Sweden[J]. Forest Ecology and Management,2016-01-01,371