气候变化领域集成服务门户(CCPortal): Forestry carbon budget models to improve biogenic carbon accounting in life cycle assessment

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DOI	10.1016/j.jclepro.2018.12.122
	Forestry carbon budget models to improve biogenic carbon accounting in life cycle assessment
	Head M.; Bernier P.; Levasseur A.; Beauregard R.; Margni M.
发表日期	2019
ISSN	9596526
起始页码	289
结束页码	299
卷号	213
英文摘要	Currently, wood and wood construction materials have limitations in how carbon fluxes are accounted for in life cycle assessments. The biogenic carbon balance of wood is often considered to be neutral, meaning that the carbon sequestered by biomass through photosynthesis is considered equal to the carbon feedstock in wood that is eventually released throughout its life cycle. Several publications have recently shown that this assumption could lead to accounting errors. This research work aims to improve the biogenic carbon accounting of the forestry phase of the life cycle of softwood products. This involved specifically modelling carbon fluxes as a function of tree species, growing conditions and forest management practices, from Canadian managed forests. A baseline natural forest scenario was run for 1000 years until the carbon stocks were assumed to reach an approximate steady-state, followed immediately by a harvest scenario that was simulated for another 100 years. The ecosystem carbon costs of the harvest activity were calculated for 117 species and region forest landscapes across Canada and expressed per cubic meter of harvested wood. Most landscapes showed net sequestration after 100 years of harvest history. Exceptions to this included outlier landscapes characterized by low average annual temperatures and precipitation where slightly positive values (net emissions) were found. The mean time to ecosystem cost neutrality for each species ranged from 16 to 60 years. Knowing the time since forest management has started on a particular forest landscape now enables managers to obtain an estimate of ecosystem carbon cost per cubic meter of wood harvested for most of Canada's forests and commercial tree species. These ecosystem carbon costs can be used to generate regionalized cradle-to-gate life cycle inventories for harvested wood products across Canada. © 2018 Elsevier Ltd
英文关键词	Biogenic carbon; Forestry; Harvest; Life cycle assessment; Wood products
scopus关键词	Budget control; Carbon; Cost benefit analysis; Ecosystems; Emission control; Fluxes; Forestry; Harvesting; Timber; Wood products; Wooden construction; Annual temperatures; Carbon accounting; Commercial tree species; Forest management practices; Growing conditions; Harvested wood products; Life Cycle Assessment (LCA); Life Cycle Inventory; Life cycle
来源期刊	Journal of Cleaner Production
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176213
作者单位	CIRAIG, Polytechnique Montréal, Mathematical and Industrial Engineering Department, C.P. 6079, Succ. Centre-Ville, Montréal, QC H3C 3A7, Canada; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 Du PEPS, CP 10380, Succursale Sainte-Foy, Québec G1V 4C7, Canada; Département de Génie de La Construction, École de Technologie Supérieure, 1100 Notre-Dame West, Montreal, Quebec, Canada; Faculté de Foresterie, de Géomatique et de Géographie, Université Laval, Québec, QC G1V 0A6, Canada
推荐引用方式 GB/T 7714	Head M.,Bernier P.,Levasseur A.,et al. Forestry carbon budget models to improve biogenic carbon accounting in life cycle assessment[J],2019,213.
APA	Head M.,Bernier P.,Levasseur A.,Beauregard R.,&Margni M..(2019).Forestry carbon budget models to improve biogenic carbon accounting in life cycle assessment.Journal of Cleaner Production,213.
MLA	Head M.,et al."Forestry carbon budget models to improve biogenic carbon accounting in life cycle assessment".Journal of Cleaner Production 213(2019).