tailieunhanh - Báo cáo lâm nghiệp: "Uncertainty estimation of biomass expansion factors for Norway spruce in the Czech Republic"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Uncertainty estimation of biomass expansion factors for Norway spruce in the Czech Republic. | Ann. For. Sci. 64 2007 133-140 INRA EDP Sciences 2007 DOI forest 2006097 133 Original article Uncertainty estimation of biomass expansion factors for Norway spruce in the Czech Republic Aleksi LEHTONENa Emil ClENCIALAb Fedor TATARINOVb Raisa MẦKIPẦẦa a Finnish Forest Research Institute . Box 18 01301 Vantaa Finland b Institute of Forest Ecosystem Research IFER 254 01 Jílové u Prahy 1544 Czech Republic Received 12 April 2006 accepted 25 August 2006 Abstract - Nation wide estimates of the changes in forest biomass are needed for the greenhouse gas GHG reporting under the Climate Convention. The bases for national GHG reporting concerning forest sector are the national forest inventory NFI programmes. Since these programmes were mostly established for monitoring of timber resources one of the current challenges for the NFIs is the development of methodology such as biomass expansion factors BEFs . The methodology for carbon stock change estimation should be transparent and verifiable but this demand is not currently met due to the fact that the source data and uncertainty in the applied BEFs are not known. Here we developed BEFs with uncertainty estimation applicable to stand wise inventory of Norway spruce forests in the Czech Republic. BEFs were constructed based on tree wise data from permanent research plots by applying biomass and volume models to tree-level data. These BEFs were age-dependent and their uncertainty was sensitive to the dependencies among errors. Most of the uncertainty in the BEFs was due to uncertainty in the biomass and volume models applied. biomass expansion factor Monte Carlo simulation greenhouse gas inventory national forest inventory Résumé - Incertitudes pour l estimation des facteurs d expansion de la biomasse chez l épicéa en République tchèque. Les estimations de la biomasse des forêts servent à évaluer les effets des changements climatiques et à dresser des rapports internationaux. En foresterie les rapports nationaux sur