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.
2017
Forfattere
Sebastian Sippel Jakob Zscheischler Martin Heimann Holger Lange Miguel D. Mahecha Geert Jan van Oldenborgh Friederike E.L. Otto Markus ReichsteinSammendrag
Daily precipitation extremes and annual totals have increased in large parts of the global land area over the past decades. These observations are consistent with theoretical considerations of a warming climate. However, until recently these trends have not been shown to consistently affect dry regions over land. A recent study, published by Donat et al. (2016), now identified significant increases in annual-maximum daily extreme precipitation (Rx1d) and annual precipitation totals (PRCPTOT) in dry regions. Here, we revisit the applied methods and explore the sensitivity of changes in precipitation extremes and annual totals to alternative choices of defining a dry region (i.e. in terms of aridity as opposed to precipitation characteristics alone). We find that (a) statistical artifacts introduced by data pre-processing based on a time-invariant reference period lead to an overestimation of the reported trends by up to 40 %, and that (b) the reported trends of globally aggregated extremes and annual totals are highly sensitive to the definition of a "dry region of the globe". For example, using the same observational dataset, accounting for the statistical artifacts, and based on different aridity-based dryness definitions, we find a reduction in the positive trend of Rx1d from the originally reported +1.6 % decade−1 to +0.2 to +0.9 % decade−1 (period changes for 1981–2010 averages relative to 1951–1980 are reduced to −1.32 to +0.97 % as opposed to +4.85 % in the original study). If we include additional but less homogenized data to cover larger regions, the global trend increases slightly (Rx1d: +0.4 to +1.1 % decade−1), and in this case we can indeed confirm (partly) significant increases in Rx1d. However, these globally aggregated estimates remain uncertain as considerable gaps in long-term observations in the Earth's arid and semi-arid regions remain. In summary, adequate data pre-processing and accounting for uncertainties regarding the definition of dryness are crucial to the quantification of spatially aggregated trends in precipitation extremes in the world's dry regions. In view of the high relevance of the question to many potentially affected stakeholders, we call for a well-reflected choice of specific data processing methods and the inclusion of alternative dryness definitions to guarantee that communicated results related to climate change be robust.
Forfattere
Hilde Margrethe Helgesen Arja Rautio Sari Piippo Eva Pongrácz Elena Golubeva Andrey Soloviev Ida Synnøve Bårvåg Grini Themistoklis AltintzoglouSammendrag
Dette prosjektet, «Healthy lifestyle choices in the Arctic» eller «Beslutninger om sunn mat og livsstil i de arktiske områdene», er finansiert av Nordisk Ministerråd gjennom det Arktiske samarbeidsprogrammet 2015-2017. Forskere ved NIBIOs avdeling for økonomi og samfunn og Nofima har samarbeidet med forskere fra universitetet i Oulu i Finland og to universiteter i Arkangelsk i Russland. En viktig del av prosjektet er at forskere fra Norge, Finland og Russland deler kunnskap og lærer av hverandre om hva som er et bærekraftig og sunt kosthold og hvordan dette virker inn på folkehelsen i de tre landene. Prosjektets overordnede mål har vært å bidra til å dokumentere noen sentrale utviklingstrekk i kosthold og alkoholforbruk og hvordan disse påvirker folks helse i Barentsregionen. Videre har prosjektet som mål å gi en kort beskrivelse av en del viktige forhold knyttet til matsvinn og hvilken rolle matsvinn har eller kan ha for et bærekraftig og sunt kosthold. Denne rapporten, som peker på store ulikheter i folkehelse i de tre landene, baserer seg på arbeid gjort i prosjektets første år. Temaet matsvinn er i denne rapporten begrenset til å peke på ulikheter i de tre landene når det gjelder regelverk og noen tiltak for å redusere mengden matsvinn. Rapporten forholder seg til arbeidet gjort i en av prosjektets arbeidspakker og ble gjennomført i perioden september 2015 tom august 2016.
Forfattere
Arja Rautio Sari Piippo Eva Pongrácz Elena Golubeva Andrey Soloviev Ida Synnøve Bårvåg Grini Themistoklis Altintzoglou Hilde Margrethe HelgesenSammendrag
The Nordic Council of Ministers through the Arctic Co-operation Programme 2015-2017, funds «Healthy food and lifestyle in the Arctic». Researchers at NIBIO - Department of Economy and Society, and Nofima has collaborated with researchers from the University of Oulu in Finland and two universities in Arkhangelsk in Russia. An important part of the project is that researchers from Norway, Finland and Russia share knowledge and learn from each other about what a sustainable and healthy diet is and how it affects public health in the three countries. The project's overall goal has been to contribute to documenting some key trends in diet and alcohol consumption, and how these affect people's health in the Barents Region. Moreover, the project aims to provide a brief description of some key aspects related to food waste and what role food waste has, or may have a sustainable and healthy diet. This report, which points to large inequalities in health in the three countries, is based on work done in the project's first year. The theme food waste in this report is limited to pointing out differences in the three countries in terms of legislation and some measures to reduce the amount food waste. The report relates to the work done in one of the project's work packages, and was conducted during the period September 2015 to August 2016.
Forfattere
Boris Fuchs Kristin Sørheim Mattheo Chincarini Asgeir Bjarnason Emma Brunberg Solveig S. Stubsjøen Barbara Zimmermann Unni Støbet Lande Svein-Olaf Hvasshovd Kjell Bratbergsengen Lise GrøvaSammendrag
Det er ikke registrert sammendrag
Forfattere
Janka Dibdiakova Liang Wang Hailong LiSammendrag
Biomass from forestry sector provides an important contribution to meet the government's targets for increasing bioenergy production and utilization. Characterization of forest residues is critical for exploiting and utilizing them for energy production purpose. In present work, stem wood, stem bark, branches, top of trees from downy birch forest were sampled from different sites in South Norway and subjected to heating value and ash content measurement. Properties of different parts of trees vertically along the tree trunk and radially along the branch and crown level were assessed via the statistical model. The heating value of stem wood was in range 18.14-18.57 MJ/kg, of stem bark 18.50-18.72 MJ/kg and of branch wood 18.21-18.50 MJ/kg. The vertical dependence of heating value of downy birch stem wood was similar to that of stem bark. Regular decreasing of heating value towards the tree top was observed. Significantly higher heating value at level p<0.05* of stem bark than the one of stem wood was observed. The ash content of downy birch branch wood did vary axially along the branch whereas there are only slight differences of ash content of branch within the crown. The stem bark has the highest ash content in range 2.0-2.5%, followed by branch wood in range of 1.0-1.6% and the lowest for stem wood in range of 0.3-0.5%.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
S. V. Bugmyrin K. F. Tirronen D. V. Panchenko Alexander Kopatz Snorre Hagen Hans Geir Eiken A. S. KuznetsovaSammendrag
We present data on the species composition of helminths in brown bears (Ursus arctos) from the Murmansk Region, Russia. The absence of any information about helminths of brown bear in the region necessitated the conduct of these studies. Samples were collected in 2014 and 2015 in the southern part of the Kola Peninsula from the White Sea coastal habitats. Annually, in the study area, 1–3 bears are legally hunted and biological samples for examination are very difficult to obtain. Therefore, we used fecal samples. We studied 93 feces and identified parasite eggs identified in 43 of them by morphometric criteria. The surveys revealed eggs of the following helminths: Dicrocoelium sp., Diphyllobothrium sp., Anoplocephalidae, Capillariidae, Baylisascaris sp., Strongylida 1, and Strongylida 2. These results represent the first reconnaissance stage, which allowed characterizing the taxonomic diversity and prevalence of parasites of brown bears of the Kola Peninsula.
Forfattere
Anne-Grete Buseth BlankenbergSammendrag
Det er ikke registrert sammendrag
Sammendrag
Blåbæra trives best i skog med både små og store trær som ikke står altfor tett, ifølge skogforsker.
Sammendrag
The moisture status of the upper 10cm of the soil profile is a key variable for the prediction of a catchment's hydrological response to precipitation, and of pivotal importance to the estimation of trafficability. Prediction, and even mapping, of topsoil water content is complicated, not in the least because of its large spatial heterogeneity. In IRIDA, an EU/JPI project, measurements, models and weather predictions will be applied to estimate the soil moisture status at the sub-field scale in near-real time. The project is in its early stages, during which the relevant parameters will be selected that will allow for soil moisture mapping on agricultural fields at a 10 m resolution.