Found 9763 publications. Showing page 295 of 391:
2004
Deposition of major inorganic compounds in Norway 2012-2016. NILU report
This report contains estimates of atmospheric deposition of major inorganic compounds in Norway for the period 2012 to 2016 using two different methods, one observational based method while the other combining atmospheric transport model with observations. Both methods show similar clear spatial gradient in the atmospheric deposition with highest loads in south and south-west. The combined method has improved the spatial information of the deposition pattern for wet deposition. For dry deposition, there are quite large uncertainties in the estimated dry deposition velocities in both methods. Compared to the previous period 2007-2011, there is a decrease in the total sulfur deposition in Norway of 9%. For total nitrogen there are minor changes. Compared to the 1978-1982 period, the reductions in sulfur and nitrogen depositions are 75% and 20% respectively.
2017
Deposition of major inorganic compounds in Norway 2007-2011. NILU OR
The total deposition of sulphur and nitrogen compounds in Norway during the period 2007-2011 has been estimated on the basis of available measurement data for concentrations and precipitation. Deposition of non-marine base cations is also estimated. Results are compared with previous estimates for 2002-2006.
2012
Deposition of major inorganic compounds in Norway 1978-1982 and 1997-2001: status and trends. NILU OR
2002
2019
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2014. OSPAR monitoring and assessment, 680/2016
2016
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2013. OSPAR monitoring and assessment, 654/2015
2015
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2012. OSPAR monitoring and assessment, 632/2014
2014
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2011. OSPAR monitoring and assessment, 597/2013
2013
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2010. OSPAR monitoring and assessment, 564/2012
2012
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2009. OSPAR monitoring and assessment, 539/2011
2011
Deposition of air pollutants around the North Sea and the North-East Atlantic in 2008. NILU OR
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.
2010
2009
2023
Deployment and Evaluation of a Network of Open Low-Cost Air Quality Sensor Systems
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
2023
1999
2005
2017
Degradation of modern synthetic polymers in museums and environmental assessment with EWO dosimetry.
2009
2017
2009