Publikasjoner

Passive UV remote sensing of volcanic sulphur and halogen emissions.

Gliss, J.; Sudbø, A.; Stebel, K.; Kylling, A.; Skauli, T.

Past and future trends in concentrations of sulphur and nitrogen compounds in the Arctic.

Hole, L.R.; Christensen, J.H.; Ruoho-Airola, T.; Tørseth, K.; Ginzburg, V.; Glowacki, P.

Patterns in the spectral composition of sunlight and biologically meaningful spectral photon ratios as affected by atmospheric factors

Kotilainen, Titta; Aphalo, Pedro J.; Brelsford, Craig C.; Böok, H.; Devraj, S.; Heikkilä, A.; Hernández, R.; Kylling, Arve; Lindfors, AV; Robson, T. Matthew

Plants rely on spectral cues present in their surroundings, generated by the constantly changing light environment, to guide their growth and reproduction. Photoreceptors mediate the capture of information by plants from the light environment over a wide range of wavelengths, but despite extensive evidence that plants respond to various light cues, only fragmentary data have been published showing patterns of diurnal, seasonal and geographical variation in the spectral composition of daylight. To illustrate patterns in spectral photon ratios, we measured time series of irradiance spectra at two distinct geographical and climatological locations, Helsinki, Finland and Gual Pahari, India. We investigated the drivers behind variation of the spectral photon ratios measured at these two locations, based on the analysis of over 400 000 recorded spectra. Differences in spectral irradiance were explained by different atmospheric factors identified through multiple regression model analysis and comparison to spectral irradiance at ground level simulated with a radiative transfer model. Local seasonal and diurnal changes in spectral photon ratios were related to solar elevation angle, atmospheric water-vapour content and total ozone column thickness and deviated from their long-term averages to an extent likely to affect plant photobiology. We suggest that future studies should investigate possible effects of varying photon ratios on terrestrial plants. Solar elevation angle especially affects the patterns of B:G and B:R ratios. Water vapour has a large effect on the R:FR photon ratio and modelled climate scenarios predict that increasing global temperatures will result in increased atmospheric water vapour. The development of proxy models, utilising available data from weather and climate models, for relevant photon ratios as a function of solar elevation angle and atmospheric factors would facilitate the interpretation of results from past, present and future field studies of plants and vegetation.

Elsevier

PBDE - miljøgiften som "forsvant".

Mariussen, E.

PBDEs in European background soils: levels and factors controlling their distribution.

Hassanin, A.; Breivik, K.; Meijer, S.N.; Steinnes, E.; Thomas, G.O.; Jones, K.C.

PCB in indoor air of a laboratory and office building in Norway.

Braathen, O A.; Schlabach, M.

PCB toxicokinetics in relation to the migratory life strategy of the Arctic char. Abstract. NILU F

Foshaug, H.

Peat fire emissions

Kaiser, Johannes

Pelagic vs coastal - What are the key drivers of pollutants load in Barents Sea polar bears?

Blévin, Pierre; Aars, J.; Andersen, Magnus; Blanchet, Marie-Anne; Hanssen, Linda; Jeffreys, R.; Nordøy, Erling Sverre; Pinzone, M.; De la Vega, C.; Routti, Heli Anna Irmeli

People and air pollution - Need or nice to know?

Bartonova, A.

Per- and polyfluorinated alkyl substances (PFAS) extracted from textile samples.

Berger, U.; Herzke, D.

Per- and polyfluorinated compounds in house dust and indoor air from northern Norway - A pilot study.

Huber, S.; Haug, L.S.; Schlabach, M.

Per- and polyfluorinated substances in the Nordic Countries. Use, occurence and toxicology. TemaNord, 2013:542

Posner, S.; Roos, S.; Poulsen, P.B.; Jörundsdottir, H.Ó, Gunnlaugsdóttir, H.; Trier, X.; Jensen, A.A.; Katsogiannis, A.A.; Herzke, D.; Bonefeld-Jörgensen, E.C.; Jönsson, C.; Pedersen, G.A.; Ghisari, M.; Jensen, S.