Agriculture
; Biotechnology & Applied Microbiology
; Energy & Fuels
英文摘要:
Forest-based bioenergy plays an important role in climate mitigation for limiting global mean temperature increase to below 2 degrees C. The greenhouse gas (GHG) impact of three forest-based bioenergy systems from the USA, Canada and Spain supplying wood pellets for electricity in the UK were evaluated by conducting lifecycle assessments and forest carbon modelling of the three forest systems. Cumulative emissions were analysed by calculating the forest carbon stock change and net GHG emissions balance of the forest-based bioenergy electricity. The analysis considered both the replacement of the existing electricity mix with bioenergy electricity and forest management with and without bioenergy use. The supply chain emissions and forest carbon balances indicated that GHG emission reductions are possible. However, the cumulative net GHG balance at forest landscape scale revealed that the reduction potential is limited, potentially with no GHG reductions in fast growing forests with shorter rotations, while slow growing forest systems with longer rotations result in greater GHG reductions. This means that the maximum climate benefit is delivered at a different point in time for different forest systems. To evaluate the climate change mitigation potential of forest-based bioenergy it is therefore necessary to consider the management, utilisation and relevant counterfactual of the whole forest and its products. In terms of climate change mitigation potential and minimising possible negative impacts that would require multi-level governance.
1.Aston Univ, Sch Engn & Appl Sci, European Bioenergy Res Inst, Supergen Bioenergy Hub, Birmingham B4 7ET, W Midlands, England 2.Laval Univ, Res Ctr Renewable Mat, Dept Wood & Forest Sci, Quebec City, PQ G1V 0A6, Canada 3.CETEMAS, Forest & Wood Technol Res Ctr, Sustainable Forest Management Area, Pumarabule S-N, Asturias 33936, Spain 4.Ctr Forest Res, Ctr Vile Stn, POB 8888, Montreal, PQ H3C 3P8, Canada
Recommended Citation:
Roder, Mirjam,Thiffault, Evelyne,Martinez-Alonso, Celia,et al. Understanding the timing and variation of greenhouse gas emissions of forest bioenergy systems[J]. BIOMASS & BIOENERGY,2019-01-01,121:99-114