Fant 9854 publikasjoner. Viser side 303 av 395:
Deposition of major inorganic compounds in Norway 2012-2016. NILU report
Avsetning av svovel og nitrogenforbindelser i Norge for perioden 2012 til 2016 er beregnet ved bruk av to forskjellige metoder, en observasjonsbasert metode, mens den andre kombinerer atmosfærisk transportmodell med observasjoner. Begge metodene viser en tydelig gradient med høyest avsetning i sør og sørvest. Den kombinerte metoden har bedre romlig informasjon, spesielt for våtavsetning. For tørravsetning er det ganske store usikkerheter i estimerte verdier for begge metodene. Sammenlignet med forrige periode 2007-2011 er det en nedgang i total svovelavsetning i Norge på 9%. For totalt nitrogen er det små endringer. Sammenlignet med 1978-1982 er det henholdsvis 75% og 20% reduksjon i svovel- og nitrogenavsetningen.
2017
Deposition of major inorganic compounds in Norway 2007-2011. NILU OR
Avsetning av svovel og nitrogenforbindelser i Norge i perioden 2007-2011 er beregnet på basis av målinger av luft- og nedbørkjemi samt nedbørmengder. Avsetning av ikke-marine basekationer er også beregnet. Resultatene er sammenlignet med tidligere estimater for 2002-2006.
2012
Deposition of major inorganic compounds in Norway 1978-1982 and 1997-2001: status and trends. NILU OR
2002
2019
2006
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