Publikasjoner

Paper degradation due to organic acids. Aging studies and MEMORI risk assessment.

Grøntoft, T.; Jeong, M.-J.; Potthast, A.

Pan-Arctic enhancements of light absorbing aerosol concentrations due to North American boreal forest fires during summer 2004. Poster presentation. NILU PP

Stohl, A.; Andrews, E.; Burkhart, J.F.; Forster, C.; Herber, A.; Hoch, S.W.; Kowal, D.; Lunder, C.; Mefford, T.; Ogren, J.A.; Sharma, S.; Spichtinger, N.; Stebel, K.; Stone, R.; Strom, J.; Tørseth, K.; Wehrli, C.; Yttri, K.E.

Painted Wood Climate Risk Analysis by the HERIe Model of Building Protection and Conservation Heating Scenarios in Norwegian Medieval Stone Churches

Grøntoft, Terje; Stoveland, Lena Porsmo

HERIe was used to model the effect of changes to indoor climate on the risk of humidity-induced mechanical damage (cracking and plastic deformation) to wooden panels painted with stiff gesso in two Norwegian medieval stone churches: Kinn (mean relative humidity (RH, %) = 79%) on the humid west coast, and Ringsaker (mean RH = 49%) in the drier eastern part of the country. The risk involved in moving cultural heritage objects (paint on wood) between the churches and a conservation studio with more “ideal”, stable conditions was also modeled. A hypothetical reduction in RH to ~65% and, proportionally, of the climate fluctuations in Kinn, and an increase in the RH in Ringsaker to a more stable value of ~63% via conservation heating, were found to improve (Kinn) and uphold (Ringsaker) the conformity to relevant standards and significantly reduce the risk of damage, except in the scenario of moving objects from Ringsaker to a conservation studio, when the risk would increase. The use of conservation heating could save ~50% of the heating cost. The estimated risk reductions may be less relevant for objects kept in situ, where cracks in the original paint and gesso have developed historically. They may be more relevant when moving original objects away from their proofed climate into a conservation studio for treatment.

MDPI

PAH measurements in air and moss around selected industrial sites in Norway 2015. NILU report

Halse, A. K.; Uggerud, H.; Schlabach, M.; Steinnes, E.

On request from the Norwegian Environment Agency a pilot study of atmospheric deposition of PAH around industrial enterprises in Norway has been carried out. The participation was voluntary and 10 industries located at 10 different sites financed their own participation. The survey is based on analysis of samples of naturally growing moss collected around the enterprises during the summer of 2015. In addition, passive air samplers for collection of volatile PAH were placed around 6 of the participating enterprises. Generally, the PAH level determined in moss collected around industrial sites were considerably higher than the PAH level found in moss collected at background sites. The levels of PAHs found in the air samples was low and often at the same level as found at the closest background site, for all out of two sites, i.e. Sunndal and Kristiansand. There is no clear indication that the industry is the only source to the levels of PAHs in moss. Hence, results from this pilot study, illustrates that moss and air samples together provide a more comprehensive information regarding the spatial distribution of PAH around the industrial sites.

PAH in moss from Norway: Spatial distribution and comparison with metal data. NILU F

Uggerud, H.T.; Steinnes, E.; Schlabach, M.; Berg, T.

Ozonlaget over Norge har stabilisert seg.

Solbakken, C.F.

Ozonlaget - det løste miljøproblemet? Kronikk.

Hansen, G.

Ozone.

Solberg, S.; Simpson, D.; Jonson, J.E.; Hjellbrekke, A.-G.; Derwent, R.

Ozone variability and halogen oxidation within the Arctic and sub-Arctic springtime boundary layer.

Gilman, J.B.; Burkhart, J.F.; Lerner, B.M.; Williams, E.J.; Kuster, W.C.; Goldan, P.D.; Murphy, P.C.; Warneke, C.; Fowler, C.; Montzka, S.A.; Miller, B.R.; Miller, L.; Oltmans, S.J.; Ryerson, T.B.; Cooper, O.R.; Stohl, A.,, de Gouw, J.A.

Ozone trends and impacts on health and crop yields.

Dentener, F.; Simpson, D.; Wild, O.; Klimont, Z.; Colette, A.; Tarasova, O.; Solberg, S.; Harmens, H.; Fagerli, H.; Mills, G.; Grennfelt, P.; Almodovar, P.; Scavo, K.; Kerr, J.; Pritula, D.; Reiss, I.

Ozone soundings at the Nadir database: processing of data for ECMWF and a study of long-term trends.

Vik, A.F.; Hansen, G.; Bojkov, B.R.; Westbye, A.

Ozone signatures of climate patterns over the Euro-Atlantic sector in the spring.

Orsolini, Y.J.; Doblas-Reyes, F.J.

Ozone research and monitoring in Norway. Powerpoint presentation. NILU F

Myhre, C.L.; Hansen, G.