Assessing the net atmospheric impacts of wood production and utilization

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• 作者：Antti Kilpel?inen ; Harri Strandman…
• 关键词：Biomass ; C dioxide ; Forest ecosystem ; Life cycle assessment ; Timber ; Wood
• 刊名：Mitigation and Adaptation Strategies for Global Change
• 出版年：2014
• 出版时间：October 2014
• 年：2014
• 卷：19
• 期：7
• 页码：955-968
• 全文大小：276 KB
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• 作者单位：Antti Kilpel?inen (1)
  Harri Strandman (2)
  Seppo Kellom?ki (2)
  Jyri Sepp?l? (3)
  
  1. Finnish Environment Institute, Centre for Sustainable Consumption and Production, Environmental Performance Unit, P.O. Box 111, 80101, Joensuu, Finland
  2. Faculty of Science and Forestry, School of Forest Sciences, University of Eastern Finland, P.O. Box 111, 80101, Joensuu, Finland
  3. Finnish Environment Institute, Centre for Sustainable Consumption and Production, P.O. Box 140, 00251, Helsinki, Finland
  
• ISSN：1573-1596

文摘

The main objective of the study was to calculate net atmospheric impacts for wood production and utilization in Finnish boreal forest conditions. Net atmospheric impacts were calculated by comparing net CO2 exchanges of the wood production and utilization to the reference management regime. Net CO2 exchanges were simulated with a life cycle assessment (LCA) tool for a Scots pine (Pinus sylvestris L.) stand (MT, Myrtillys-type) in central Finland (Joensuu region, 62°39?N, 29°37 E) over two consecutive rotation periods (100--00?years/200?years). Net atmospheric impacts were calculated both for sawn timber and pulpwood, and expressed in kgCO2m?. According to the results, the production of pulp and sawn timber produced emissions of 0.20 and 0.59?kgCO2m? over the 200-year period, respectively, when the unmanagement regime was used as the reference management regime. When 50?% of the processing waste of timber was accounted as an instant emission to the atmosphere, the atmospheric impact increased to 0.55?kgCO2m? in pulpwood and to 1.27?kgCO2m? in sawn timber over the 200?year period. When turnover rates of sawn timber in the technosystem were decreased by 30?% and the share of energy use was decreased to 30?%, the atmospheric impact decreased by 17?% and 4?% for pulpwood and sawn timber, respectively, compared to the default wood degradation and energy use of 50?%. The utilized LCA approach provided an effective tool for approaching net atmospheric impacts originating from the ecosystem carbon (C) flows and variable wood utilization. Taking the ecosystem production and utilization of wood (i.e. degradation of technosystem C stock) into account, in terms of net CO2 exchange, the mitigation possibilities of wood compared to other products can be accounted for more precisely in the future and C sequestration credited more specifically for a certain wood product.