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.
2009
Sammendrag
Evaluation of climate change consequences and national carbon reporting such as under the Kyoto protocol require long-term monitoring of carbon fluxes. We report on an ongoing project aimed at a national-level assessment of the terrestrial carbon sequestration potential under present conditions and under various climate and land use change scenarios, in particular in terms of their temperature effect. We develop empirical models for national soil carbon stock assessment and evaluate process-based soil carbon models for prediction of future carbon dynamics.....
Sammendrag
The CO2 uptake of the terrestrial biosphere (Gross Primary Productivity, GPP) plays a key role in the global carbon balance. This carbon flux cannot be determined directly on a global scale. Yet, the remotely sensed Fraction of Absorbed Photosynthetically Active Radiation (FAPAR) is a valuable proxy for GPP. This study aims at characterizing global FAPAR dynamics on different temporal scales and extracting corresponding spatial structures. The time series were analyzed to uncover the presence and extent of trends, and to identify quasi-oscillatory patterns from intra- to interannual time scales....
Sammendrag
In high-latitude areas, landscapes with flat or moderate relief areas usually contain lakes and mires. The identification of flowpaths in such areas is a difficult issue. The increasing availability of high resolution topography from airborne Lidar measurements offers new opportunities for automatic or semi-automatic channel extraction from DEMs in small watersheds, substantially outperforming the hydrographic network in conventional digital maps....
Sammendrag
Stream flow observations from a geographical region are known to often exhibit strong common behavior. In order to assess the temporal evolution of the complexity of stream flow time series from all over Europe, we employ the recently developed Linear Variance Decay dimension density (δLV D). It is estimated as the parameter of an exponential decay function fitted to the remaining variances of the eigenvalues of a covariance matrix. Scaling between zero and one, δLV D can be interpreted as a measure of the proportion of linear independent components in a multivariate record.....
Sammendrag
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Forfattere
Kjell Andreassen Volkmar Timmermann Nicholas Clarke Halvor Solheim Ingvald Røsberg Wenche AasSammendrag
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Forfattere
Knut G Berdal Jihong Liu Clarke Helge Klungland Casper Linnestad Anne Ingeborg Myhr Audun Helge Nerland Ingolf Nes Kåre Magne Nielsen Odd Egil Stabbetorp Vibeke Thrane Hilde-Gunn Opsahl SortebergSammendrag
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Forfattere
Paul Eric AspholmSammendrag
I det faste arbeidet i de russiske zapovednikene (statlige naturreservater) brukes det et felles registreringssystem som kalles ”letopis prirodi” – naturens årbøker. En del av dette systemet består av fenologiske registreringer. Flere av de russiske naturreservatene ble opprettet på midten av 1900 tallet eller tidligere. Tre av de fire verneområdene på Kolahalvøya er mer enn 70 år. De fenologiske registreringene utgjør derved lange tidsserier.