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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.

2007

Sammendrag

The substitution of biomass for fossil fuels in energy consumption is a measure to mitigate global warming, as well as having other advantages. Political action plans for increased use exist at both European and national levels. This paper briefly reviews the contents of recommendations, guidelines, and other synthesis publications on sustainable use of forest biomass for energy. Topics are listed and an overview of advantages, disadvantages, and trade-offs between them is given, from the viewpoint of society in general and the forestry and energy sectors in particular. For the Nordic and Baltic countries, the paper also identifies the extent to which wood for energy is included in forest legislation and forest certification standards under the ?Programme for the Endorsement of Forest Certification? (PEFC) and the ?Forest Stewardship Council? (FSC) schemes. Energy and forest policies at EU and national levels, and European PEFC forest standards are analysed. With respect to energy policies, the utilisation of wood for energy is generally supported in forest policies, but forest legislation is seldom used as a direct tool to encourage the utilisation of wood for energy. Regulations sometimes restrict use for environmental reasons. Forest certification standards include indicators directly related to the utilisation of wood for energy under several criteria, with most occurrences found under environmental criteria. Roles and problems in relation to policy, legislation, certification standards, recommendations and guidelines, and science are discussed.

Sammendrag

Universitetet for miljø- og biovitenskap fikk i mai 2007 i oppdrag fra Norges Forskningsråd å kartlegge og beskrive kunnskapsstatus og forskningsbehov knyttet til bioenergi og klimagasser fra landbruket (jord, skog og utmark). Utredningen beskriver i korte trekk dagens status og hovedutfordringer når det gjelder produksjon av bioenergi og utslipp/binding av klimagasser i landbruket, og peker på sentrale forskningsbehov og forskningsoppgaver som kan bidra til å møte disse utfordringene. Rapporten er basert på bidrag fra forskningsmiljøene på Campus Ås.

2006

Sammendrag

This document contains a summary of some techniques that can be used for CO2 monitoring considering a field laboratory site with an injection depth in the order of hundreds of meters. We will mainly focus on seismic: 3D and 4D surface seismic, acoustic image, multicomponent (MC) seismic, microseismic monitoring, boreholebased seismic, 4D cross-hole seismic surveying, 4D vertical seismic profiling (VSP); acoustic sonar bathimetry techniques; gravimetric techniques; electrical or electromagnetic techniques: electrical resistance tomography (ERT), ground penetrating radar, borehole radar, magnetotellurics; but geochemical techniques are included, like isotope methods, geochemical tracers, water chemistry. Finally, soil gas techniques and remote sensing methods area also described in this document. Storage of CO2 in geological formations is feasible on industrial scale. At the same time there is a requirement from Environmental and Health Authorities for documentation of subsurface behaviour of CO2. In this document we summarize different approaches for monitoring of subsurface migration, leakage and chemical reactions of CO2. We suggest performing studies at different scales including laboratory and field experiments. The methods we suggest has special emphasize on early detection of small amounts of CO2 migration. Of that reason the main focus of this report is on indirect geophysical monitoring (viz seismic, electrical and electromagnetic methods). To document subsurface reactions we also include geochemical methods. We suggest including ecological monitoring as an integrated part of the field experiments. Ecological monitoring will provide detection (or confirmation) of moderate CO2 leakage to the soil surface, and at the same time quantify effects on the vegetation of potentially leakages from geologically-stored CO2. In order to add value to the monitoring program, we recommend initiating simulation of monitoring experiments as early as possible in the project. Simulation of monitoring experiments should then be coupled to inverse flow simulations in order to optimize the monitoring program. Finally, monitoring of two specific field sites is suggested: The Brumunddal sandstone, and the Svelvik ridge in the outlet of the Drammensfjord. The preliminary budget for monitoring a field experiment on each side is 27.3 and 30.2 million NOK respectively. Recommendations for further work include: " Geological characterization of storage site and surrounding area. " Production of geological and numerical flow models of storage site and surrounding area. " Simulation of CO2 injection into the geological formation to identify potential migration and thus leakage points. This includes physical and chemical changes of the reservoir rock and surrounding strata. " Risk assessment to identify features, events and processes that might lead to the migration of CO2 and potential leakage. " Establish monitoring based on step 3 and 4 above. This includes monitoring of subsurface and surface area surrounding the storage site. " History matching of observations and simulation results (and if necessary modification of monitoring acquisitions).