Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2017
Authors
Nicholas Clarke Silje Skår O. Janne Kjønaas Kjersti Holt Hanssen Tonje Økland Jørn-Frode Nordbakken Toril Drabløs Eldhuset Holger LangeAbstract
Short-term (three to four years) effects of forest harvesting on soil solution chemistry were investigated at two Norway spruce sites in southern Norway, differing in precipitation amount and topography. Experimental plots were either harvested conventionally (stem-only harvesting, SOH) or whole trees, including crowns, twigs and branches were removed (whole-tree harvesting, WTH), leaving residue piles on the ground for some months before removal. The WTH treatment had two sub-treatments: WTH-pile where there had been piles and WTH-removal, from where residues had been removed to make piles. Increased soil solution concentrations of NO3–N, total N, Ca, Mg and K at 30 cm depth, shown by peaks in concentrations in the years after harvesting, were found at the drier, less steep site in eastern Norway after SOH and WTH-pile, but less so after WTH-removal. At the wetter, steeper site in western Norway, peaks were often observed also at WTH-removal plots, which might reflect within-site differences in water pathways due largely to site topography.
Authors
Jihong Liu Clarke Andre van Eerde Lisa Paruch Inger Heldal Hege Særvold Steen Yanliang Wang Astrid Sivertsen Sissel HaugslienAbstract
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Authors
Bjørn Kløve Hanne Margrethe Lund Kvitsand Maria J. Gunnarsdottir Sylvi Gaut Tarja Pitkänen Sigurdur Gardarsson P. Rossi Ilkka MiettinenAbstract
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The PETRO MAKS project "Formation and behaviour of thin oil films and evaluation of response methods including HSE", in the following short "Thin oil films" has the objective to achieve new knowledge more efficient and safe oil spill response operations for releases of condensates and light crude oils that may lead to thin oil films on the sea surface. Main objectives are: 1. lncreased understanding of the formation and behaviour of thin oil films . 2. Assessment of the potential human exposure to volatile compounds 3. Refined processes in oil trajectory models in order to give more reliable predictions of the life time and behaviour of thin oil films and to assess the efficacy of response options. This report addresses objective 3. and summarizes the results of three pre-studies on important processes for modelling of (thin) surface oil. We discuss model improvements and conclude with a proposal for concrete changes in the OSCAR model to better address behaviour and lifetime of thin films in the model.
Authors
Trygve S. Aamlid Wendy Marie Waalen Pia Heltoft Thomsen Tatsiana Espevig Agnar Kvalbein Gudni Thorvaldsson A. M. D. JensenAbstract
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