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Affiner la recherche Interroger des sources externesHarmonisation of stem volume estimates in European National Forest Inventories / Thomas Gschwantner in Annals of Forest Science [en ligne], vol 76 n° 1 (March 2019)
Titre : Harmonisation of stem volume estimates in European National Forest Inventories Type de document : Article/Communication Auteurs : Thomas Gschwantner, Auteur ; Iciar A. Alberdi, Auteur ; Andras Balazs, Auteur ; Sébastien Bauwens, Auteur ; Susann Bender, Auteur ; Dragan Borotra, Auteur ; Michal Bosela, Auteur ; Olivier Bouriaud Année de publication : 2019 Projets : DIABOLO / Packalen, Tuula Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] bois sur pied
[Termes descripteurs IGN] diamètre à hauteur de poitrine
[Termes descripteurs IGN] Europe (géographie politique)
[Termes descripteurs IGN] harmonisation des données
[Termes descripteurs IGN] inventaire forestier étranger (données)
[Termes descripteurs IGN] ressources forestières
[Termes descripteurs IGN] volume en bois
[Vedettes matières IGN] Inventaire forestierRésumé : (auteur) Key message: Volume predictions of sample trees are basic inputs for essential National Forest Inventory (NFI) estimates. The predicted volumes are rarely comparable among European NFIs because of country-specific dbh-thresholds and differences regarding the inclusion of the tree parts stump, stem top, and branches. Twenty-one European NFIs implemented harmonisation measures to provide consistent stem volume predictions for comparable forest resource estimates.
Context: The harmonisation of forest information has become increasingly important. International programs and interest groups from the wood industry, energy, and environmental sectors require comparable information. European NFIs as primary source of forest information are well-placed to support policies and decision-making processes with harmonised estimates.
Aims: The main objectives were to present the implementation of stem volume harmonisation by European NFIs, to obtain comparable growing stocks according to five reference definitions, and to compare the different results.
Methods: The applied harmonisation approach identifies the deviations between country-level and common reference definitions. The deviations are minimised through country-specific bridging functions. Growing stocks were calculated from the un-harmonised, and harmonised stem volume estimates and comparisons were made.
Results: The country-level growing stock results differ from the Cost Action E43 reference definition between − 8 and + 32%. Stumps and stem tops together account for 4 to 13% of stem volume, and large branches constitute 3 to 21% of broadleaved growing stock. Up to 6% of stem volume is allocated below the dbh-threshold.
Conclusion: Comparable volume figures are available for the first time on a large-scale in Europe. The results indicate the importance of harmonisation for international forest statistics. The presented work contributes to the NFI harmonisation process in Europe in several ways regarding comparable NFI reporting and scenario modelling.Numéro de notice : A2019-619 Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s13595-019-0800-8 date de publication en ligne : 28/02/2019 En ligne : https://doi.org/10.1007/s13595-019-0800-8 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95351
in Annals of Forest Science [en ligne] > vol 76 n° 1 (March 2019)[article]
Titre : Comparison of methods used in European National Forest Inventories for the estimation of volume increment: towards harmonisation Type de document : Article/Communication Auteurs : Thomas Gschwantner, Auteur ; Adrian Lanz, Auteur ; Claude Vidal, Auteur ; Michal Bosela, Auteur ; Martin Vestman, Auteur ; Klemens Schadauer, Auteur ; Lucio di Cosmo, Auteur ; Jonas Fridman, Auteur ; Patrizia Gasparini, Auteur ; Andrius Kuliesis, Auteur ; Stein Michael Tomter, Auteur Année de publication : 2016 Article en page(s) : pp 807 - 821 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] analyse comparative
[Termes descripteurs IGN] croissance végétale
[Termes descripteurs IGN] estimation statistique
[Termes descripteurs IGN] harmonisation des données
[Termes descripteurs IGN] inventaire forestier étranger (données)
[Termes descripteurs IGN] inventaire forestier national (données France)
[Termes descripteurs IGN] volume en bois
[Vedettes matières IGN] Inventaire forestierRésumé : (Auteur) The increment estimation methods of European NFIs were explored by means of 12 essential NFI features. The results indicate various differences among NFIs within the commonly acknowledged methodological frame. The perspectives for harmonisation at the European level are promising.
Context : The estimation of increment is implemented differently in European National Forest Inventories (NFIs) due to different historical origins of NFIs and sampling designs and field assessments accommodated to country-specific conditions. The aspired harmonisation of increment estimation requires a comparison and an analysis of NFI methods.
Aims : The objective was to investigate the differences in volume increment estimation methods used in European NFIs. The conducted work shall set a basis for harmonisation at the European level which is needed to improve information on forest resources for various strategic processes.
Methods : A comprehensive enquiry was conducted during Cost Action FP1001 to explore the methods of increment estimation of 29 European NFIs. The enquiry built upon the preceding Cost Action E43 and was complemented by an analysis of literature to demonstrate the methodological backgrounds.
Results : The comparison of methods revealed differences concerning the NFI features such as sampling grids, periodicity of assessments, permanent and temporary plots, use of remote sensing, sample tree selection, components of forest growth, forest area changes, sampling thresholds, field measurements, drain assessment, involved models and tree parts included in estimates.
Conclusion : Increment estimation methods differ considerably among European NFIs. Their harmonisation introduces new issues into the harmonisation process. Recent accomplishments and the increased use of sample-based inventories in Europe make perspectives for harmonised reporting of increment estimation promising.Numéro de notice : A2016--008 Thématique : FORET Nature : Article En ligne : http://dx.doi.org/10.1007/s13595-016-0554-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83833
in Annals of Forest Science [en ligne] > vol 73 n° 4 (December 2016) . - pp 807 - 821[article]
Titre : Stem quality assessment in European National Forest Inventories: an opportunity for harmonised reporting? Type de document : Article/Communication Auteurs : Michal Bosela, Auteur ; John Redmond, Auteur ; Miloš Kučera, Auteur Année de publication : 2016 Article en page(s) : pp 635 – 648 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] Europe (géographie politique)
[Termes descripteurs IGN] évaluation des données
[Termes descripteurs IGN] harmonisation des données
[Termes descripteurs IGN] inventaire forestier étranger (données)
[Termes descripteurs IGN] qualité des données
[Termes descripteurs IGN] tronc
[Vedettes matières IGN] Inventaire forestierRésumé : (auteur) Key message : The potential of European National Forest Inventories to harmonise stem quality estimation in European forests was identified despite considerable differences in existing national approaches.
Context : Knowledge on stem quality and assortments structure in European forests is highly important for policy makers and the timber industry and also for carbon life cycle analysis due to the fact that different timber products have different end use and thus store carbon for different time periods.
Aims : The study aim was to evaluate the potential of European National Forest Inventories (NFI) to objectively report on the stem quality in European forests in a harmonised manner.
Methods : A comprehensive questionnaire was conducted as the first important step to evaluate the current status of stem quality assessment and assess the existing level of harmonisation.
Results : Direct stem quality assessment or classification is used in 19 out of 28 European NFIs. Only eight countries provide timber assortment estimates from their NFIs. In addition, different sampling strategies for stem quality assessment are used among NFIs. Tree parameters relevant for stem quality assessment on standing trees were identified for the purpose of harmonisation. Several methods towards harmonisation between European NFIs for the purpose of reporting on stem quality of European forests were suggested.
Conclusion : Current European NFIs are not capable of reporting the stem quality of European forests in a harmonised manner at this stage and considerable efforts will need to be taken before the harmonised stem quality estimation can be prepared. However, the inquiry also revealed that there is a potential to develop the harmonised estimations in future.Numéro de notice : A2016-712 Thématique : FORET Nature : Article En ligne : http://dx.doi.org/10.1007/s13595-015-0503-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82090
in Annals of Forest Science [en ligne] > vol 73 n° 3 (September 2016) . - pp 635 – 648[article]National Forest Inventories : assessment of wood availability and use, ch. Progress towards harmonised assessment of availability and use of wood resources in Europe / Claude Vidal (2016)
contenu dans National Forest Inventories : assessment of wood availability and use / Claude Vidal (2016)
Titre de série : National Forest Inventories : assessment of wood availability and use, ch Titre : Progress towards harmonised assessment of availability and use of wood resources in Europe Type de document : Chapitre/Contribution Auteurs : Claude Vidal, Auteur ; Thomas Gschwantner, Auteur ; Kari T. Korhonen, Auteur ; Iciar A. Alberdi, Auteur ; Patrizia Gasparini, Auteur ; John Redmond, Auteur ; Christian Ginzler, Auteur ; Christoph Fischer, Auteur ; Jean-Christophe Hervé Editeur : Springer International Publishing Année de publication : 2016 Importance : pp 81 - 104 Note générale : bibliographie Langues : Français (fre) Descripteur : [Termes descripteurs IGN] Europe (géographie politique)
[Termes descripteurs IGN] harmonisation des données
[Termes descripteurs IGN] Inventaire Forestier National (organisme France)
[Termes descripteurs IGN] ressources forestières
[Vedettes matières IGN] Inventaire forestierRésumé : (auteur) A willingness to create precise definitions for terms describing forest resources between the National Forest Inventory (NFIs) data providers and UN international organisations dates back to the late nineties. European NFIs enhanced this harmonisation process by introducing the concepts of (i) reference definitions agreed by consensus but enforcing a more rigorous interpretation of such definitions (ii) bridges that allow for the transformation of national data into comparable data using an associated reference definition. Illustrative examples of some key definitions and case studies for generating comparable data are the core focus of this chapter. Discussions on recent harmonisation processes, including the way of working and a framework for future proposals are given by way of conclusion. Numéro de notice : H2016-006 Thématique : FORET Nature : Chapître / contribution nature-HAL : ChOuvrScient DOI : 10.1007/978-3-319-44015-6_4 En ligne : http://dx.doi.org/10.1007/978-3-319-44015-6_4 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83818
