article id 265,
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                            We examine the current status of greenhouse gas inventories of the  sector Land Use, Land-Use Change and Forestry (LULUCF), in European  countries, with specific focus on the utilization of National Forest  Inventory (NFI) programs. LULUCF inventory is an integral part of the  reporting obligations under the United Nations Framework Convention on  Climate Change (UNFCCC) and its Kyoto Protocol. The analysis is based on  two questionnaires prepared by the COST Action E43 “Harmonisation of  National Forest Inventories in Europe”, which were answered by  greenhouse gas reporting experts in European countries. The following  major conclusions can be drawn from the analysis: 1) definitions used to  obtain carbon pool change estimates vary widely among countries and are  not directly comparable 2) NFIs play a key role for LULUCF greenhouse  gas estimation and reporting under UNFCCC, and provide the fundamental  data needed for the estimation of carbon stock changes covering not only  living biomass, but increasingly also deadwood, litter and soil  compartments. The study highlights the effects of adopting different  definitions for two major reporting processes, namely UNFCCC and FAO,  and exemplifies the effect of different tree diameter thresholds on  carbon stock change estimates for Finland. The results demonstrate that  more effort is needed to harmonize forest inventory estimates for the  purpose of making the estimates of forest carbon pool changes  comparable. This effort should lead to a better utilization of the data  from the European NFI programs and improve the European greenhouse gas  reporting.
                        
                
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                            Cienciala,
                            Institute of Forest Ecosystem Research (IFER), Areal 1. Jilovske a.s. 1544, 254 01 Jilove u Prahy, Czech Republic
                                                        E-mail:
                                                            emil.cienciala@ifer.cz
                                                                                          
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                            Tomppo,
                            Metla, Finnish Forest Research Institute, Finland
                                                        E-mail:
                                                            et@nn.fi
                                                                                
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                            Snorrason,
                            Icelandic Forest Research, Iceland
                                                        E-mail:
                                                            as@nn.is
                                                                                
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                            Broadmeadow,
                            Forestry Commission, Forest Research Alice Holt Logdge, United Kingdom
                                                        E-mail:
                                                            mb@nn.uk
                                                                                
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                            Colin,
                            French National Forest Inventory, France
                                                        E-mail:
                                                            ac@nn.fr
                                                                                
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                            Dunger,
                            Federal Research Centre for Forestry and Forest Products, Institute of Forest Ecology and Forest Assessment, Germany
                                                        E-mail:
                                                            kd@nn.de
                                                                                
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                            Exnerova,
                            Institute of Forest Ecosystem Research, Czech Republic
                                                        E-mail:
                                                            ze@nn.cz
                                                                                
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                            Lasserre,
                            Department of Environment and Territory Sciences and Technologies, University of Molise, Italy
                                                        E-mail:
                                                            bl@nn.it
                                                                                
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                            Petersson,
                            Swedish University of Agricultural Sciences, Department of Forest Resource Management, Sweden
                                                        E-mail:
                                                            hp@nn.se
                                                                                
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                            Priwitzer,
                            National Forest Centre, Forest Research Institute. Slovak Republic
                                                        E-mail:
                                                            tb@nn.sk
                                                                                
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                            Sanchez,
                            Forest Health Unit, General Directorate for Biodiversity, Environmental Ministry, Spain
                                                        E-mail:
                                                            gs@nn.es
                                                                                
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                            Ståhl,
                            Swedish University of Agricultural Sciences, Department of Forest Resource Management, Sweden
                                                        E-mail:
                                                            gs@nn.se