Publikasjoner

Defining chemical signatures - is more always better? Keynote lecture.

Mudge, Stephen Michael

Defining isotopic indicators for precipitation origin and recycling from a multi-year high-resolution climatology of Alpine moisture sources.

Sodemann, H.

Degradation of modern synthetic polymers in museums and environmental assessment with EWO dosimetry.

Grøntoft, T.; Lopez-Aparicio, S.

Deliverable 7.1. "Final treshold values for pollution scenarios, areas and cities with exceeding treshold pollution levels and tool for rapid assessment of deterioration risk to cultural heritage". NILU OR

Henriksen, J.F.; Grøntoft, T.; Hamilton, R.; Watt, J.; Tidblad, J.; Kucera, V.; Snethlage, R.; Ionescu, A.

Den Tyske Skole, Nydalen. Beregning av luftforurensningsbelastning. NILU OR

Haugsbakk, I.; Tønnesen, D.

Deployment and Evaluation of a Network of Open Low-Cost Air Quality Sensor Systems

Schneider, Philipp; Vogt, Matthias; Haugen, Rolf; Hassani, Amirhossein; Castell, Nuria; Dauge, Franck Rene; Bartonova, Alena

Low-cost air quality sensors have the potential to complement the regulatory network of air quality monitoring stations, with respect to increased spatial density of observations, however, their data quality continues to be of concern. Here we report on our experience with a small network of open low-cost sensor systems for air quality, which was deployed in the region of Stavanger, Norway, under Nordic winter conditions. The network consisted of AirSensEUR sensor systems, equipped with sensors for, among others, nitrogen dioxide and fine particulate matter. The systems were co-located at an air quality monitoring station, for a period of approximately six weeks. A subset of the systems was subsequently deployed at various roadside locations for half a year, and finally co-located at the same air quality monitoring station again, for a post-deployment evaluation. For fine particulate matter, the co-location results indicate a good inter-unit consistency, but poor average out-of-the-box performance (R2 = 0.25, RMSE = 9.6 μ
g m−3). While Köhler correction did not significantly improve the accuracy in our study, filtering for high relative humidity conditions improved the results (R2 = 0.63, RMSE = 7.09 μg m−3). For nitrogen dioxide, the inter-unit consistency was found to be excellent, and calibration models were developed which showed good performance during the testing period (on average R2 = 0.98, RMSE = 5.73 μg m−3), however, due to the short training period, the calibration models are likely not able to capture the full annual variability in environmental conditions. A post-deployment co-location showed, respectively, a slight and significant decrease in inter-sensor consistency for fine particulate matter and nitrogen dioxide. We further demonstrate, how observations from even such a small network can be exploited by assimilation in a high-resolution air quality model, thus adding value to both the observations and the model, and ultimately providing a more comprehensive perspective of air quality than is possible from either of the two input datasets alone. Our study provides valuable insights on the operation and performance of an open sensor system for air quality, particularly under challenging Nordic environmental conditions.

MDPI

Deployment and Evaluation of Networks of Open Air Quality Sensor Systems - Experiences from deployments in Stavanger and Oslo

Schneider, Philipp; Vogt, Matthias; Haugen, Rolf; Hassani, Amirhossein; Castell, Nuria; Peters, Jan; Yatkin, Sinan; Gerboles, Michel; Matheeussen, Christina; Davila, Silvije; Signorini, Marco; Dauge, Franck Rene; Skaar, Jøran Solnes; Bartonova, Alena

Deposition of air pollutants around the North Sea and the North-East Atlantic in 2008. NILU OR

Barrett, K.

This reports summarises the observations of the deposition of pollutants from the atmosphere to the North Sea area during 2008. Priority is given to the metals arsenic, cadmium, chromium, copper, lead, mercury, nickel, and zinc, the organic pollutant lindane, and to oxidised and reduced forms of nitrogen. A number of voluntarily monitored pollutants are also reported by North Sea countries. As well as providing rates of deposition observed in 2008, the report summarises the temporal trends in deposition of lead, cadmium, mercury and PCB's.

Deposition of air pollutants around the North Sea and the North-East Atlantic in 2010. OSPAR monitoring and assessment, 564/2012

Newton, A.

Deposition of air pollutants around the North Sea and the North-East Atlantic in 2012. OSPAR monitoring and assessment, 632/2014

Aas, W.

Deposition of air pollutants around the North Sea and the North-East Atlantic in 2014. OSPAR monitoring and assessment, 680/2016

Aas, W.

Deposition of ionic species and black carbon to the Arctic snowpack: combining snow pit observations with modeling

Jacobi, Hans-Werner; Obleitner, Friedrich; Da Costa, Sophie; Ginot, Patrick; Eleftheriadis, Konstantinos; Aas, Wenche; Zanatta, Marco