Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2010
Forfattere
Trygve S. AamlidSammendrag
Gårdsreportasje om økologisk engsvingelfrøavl i praksis
Sammendrag
The primary aim of this study was to investigate the suitability of interferometric X-band SAR (InSAR) for inventory of boreal forest biomass. We investigated the relationship between SRTM X-band InSAR height and above-ground biomass in a study area in southern Norway. We generated biomass reference data for each SRTM pixel from a field inventory in combination with airborne laser scanning (ALS). One set of forest inventory plots served for calibrating ALS based biomass models, and another set of field plots was used to validate these models. The biomass values obtained in this way ranged up to 250 t/ha at the stand level. The relationship between biomass and InSAR height was linear, no apparent saturation effect was present, and the accuracy was high (RMSE = 19%). The relationship differed between Norway spruce and Scots pine, where an increase in InSAR height of 1 m corresponded to an increase in biomass of 9.9 and 7.0 t/ha. respectively. Using a high-quality terrain model from ALS enabled biomass to be estimated with a higher accuracy as compared to using a terrain model from topographic maps. Interferometric X-band SAR appears to be a promising method for forest biomass monitoring. (C) 2010 Elsevier Inc. All rights reserved.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Steve Goldberg Kristin Kaspersen Steve Goldberg Jan Netland Øyvind Overskeid Trygve StølanSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristin Kaspersen Therese With Berge Steve Goldberg Jan Netland Øyvind Overskeid Trygve StølanSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristin Kaspersen Therese With Berge Steve Goldberg Jan Netland Øyvind Overskeid Trygve StølanSammendrag
Det er ikke registrert sammendrag
Forfattere
Tron Eid Andreas Brunner Gunnhild Søgaard Rasmus Astrup Stein Tomter Øyvind Løken Rune EriksenSammendrag
Ambitious targets for renewable energy production in Norway draw attention to biomass potent-ials. The objective of this report is to review the state of the art regarding research on estimation methods, the availability and production of tree biomass resources for energy purposes in Norway in order to indentify knowledge gaps and thus facilitate appropriate focus, development and priorities regarding research for the coming years. The review focuses on biomass from pri-mary forest production with emphasis on Norwegian conditions, but also considers international research, especially from the other Nordic countries. Three main subject areas are considered: - biomass estimation - biomass resources and availability - biomass production. The first part of this report comprises an overview of existing biomass equations and associated inventory methods applied for estimating biomass in Norway. The overview includes a description of the Norwegian National Forest Inventory data as a basis for large-scale biomass assessments. The second part of the report comprises an overview of previous Norwegian assessments of biomass as an energy supplier as well as suggestions for improvements in such assessments. Improvement possibilities regarding the impacts of environmentally oriented restrictions, appropriate models for productivity and cost calculations regarding biomass harvesting systems, and implementation of biomass-related features in existing decisions support systems to facilitate analyses, where timber production and biomass production for energy purposes are equally important, are identified. The final part of the review focuses on silvi-cultural options aiming at optimizing the value of total biomass instead of the conventional approach to silviculture where the main focus is timber values.
Forfattere
Arne EriksenSammendrag
Intervju med prosjektleder Jihong Liu Clarke, seksjonsleder Sonja Klemsdal, og avd. ing. Even Sannes Riiser.
Forfattere
Eva SkarbøvikSammendrag
Foredrag i Norsk Vannforening 15. oktober 2010. Fagtreff om Overvåking i forbindelse med implementeringen av Vanndirektivet.
Forfattere
Arne HermansenSammendrag
Det er ikke registrert sammendrag