Found 9759 publications. Showing page 153 of 391:
2011
Update of background concentrations over Norway. NILU OR
A methodology for creating a new dataset of estimated background concentrations of NO2, O3, PM10, and PM2.5 that are representative of a typical year over Norway, was developed. The dataset has a spatial resolution of 10 km × 10 km and an hourly temporal resolution. The methodology is based on a spatial mapping component for obtaining information on annual mean background concentrations, and a temporal characterization component, which uses long-term time series of station data to describe the typical development of background concentrations throughout a day and a year. When combined, these two components allow estimates of typical background concentrations at any time of the year at any location in Norway. Whereas the previously used VLUFT method of 1993 only provided spatially constant data at the county level, the new method presented here provides spatially continuous data at a comparatively high spatial resolution. Furthermore, while the previous method only gave a range of constant values that were considered valid throughout the entire year, the new technique provides continuous time series for a typical year at hourly resolution at any location in Norway.
2011
2011
Volatile and persistent emissions from traffic and power production on Svalbard. VETAPOS. NILU OR
Volatile organic compounds (VOC) including Benzene-Toluene-Xylene (BTX) related compounds were monitored in ambient air samples during Spring (April-Mai) and Autumn (October) 2010 as a follow-up of an earlier BTX ambient air monitoring program in 2007 (Reimann et al 2007) at the Research park in Longyearbyen (Forskningsparken). In addition, BTX related compounds were measured in 18 ¿headspace¿ samples above collected surface soil along snowmobile tracks in Longyeardalen, Adventdalen, Todalen as well as Sassendalen (Fredheim). In addition, during the 2010 VETAPOS in a parallel surface soil sampling campaign 18 samples were analysed for 15 priority PAH compounds.
2011
NILU has carried out a monitoring program regarding meteorology and air quality in Sauda during the periode 01.10.2010-31.03.2011. Filters have been investigated regarding several metallic compounds.
2011
Dispersion calculations of NOx emissions at Salten Verk. NILU OR
Dispersion calculations have been carried out for emissions from Salten Verk in Nordland.
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A particle sampling and monitoring programme has been carried out in Khalifa Port Industrial Zone (KPIZ), between Abu Dhabi and Dubai. At the site in Area A of KPIZ, PM2.5 was sampled on filters during a six month period. The filters were analysed gravimetrically and with respect to fluoride. Selected filters were subject to detailed chemical speciation.
PM2.5 mass concentrations were found to agree well with concentrations observed throughout Abu Dhabi. Also inorganic ion concentrations and concentrations of most elements were similar to the Abu Dhabi average. The total carbon contribution in KPIZ was found to be lower than in the Abu Dhabi average. Fluoride concentrations were below guidance levels defined by WHO throughout the sampling period.
Inorganic ions (sulphate, nitrate, ammonium, sodium, chloride , calcium, magnesium, potassium) explained on average 49% of the PM2.5 mass, dominated by sulphate, ammonium and nitrate, which are indicators of secondary inorganic aerosol (long-range transported, anthropogenic origin).
Crustal elements (calcium, magnesium, aluminium, iron, titanium) were found to be the most abundant elements. The elements analysed accounted for 15% (on average) of the PM2.5 mass. Reconstructing the mass of crustal oxides, approximately 44% of the fine particle mass was estimated to be associated with mineral dust. Toxic heavy metal concentrations were found to be below guideline values.
Total carbon, which consists of elemental carbon, organic carbon and carbonate carbon contributed on average 12% to PM2.5 mass. About 15% of total carbon is carbonate of natural origin. Elemental carbon and organic carbon of likely anthropogenic origin usually account for most total carbon in PM2.5 in KPIZ.
PM in KPIZ has a strong signature of natural sources (mineral dust) and long-range transport of particulate pollutants. A detailed apportionment of sources requires the analysis of more samples.
2011
Dispersion calculations due to emissions from Råde Mølle og Kornsilo. NILU OR
Dispersion calculations and stack height calculatoons have been carried out for emissions from bio fuelled incinerator at Råde Mølle og Kornsilo. Minimum stack height is calculated to 29 metres above ground level with input presented in this report.
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Bedre byluft. Prognoser for meteorologi og luftkvalitet i norske byer vinteren 2010-2011. met.no report, 8/2011
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2011
Air Quality Monitoring Project, Abu Dhabi City Municipality. Site Selection report. NILU OR
NILU has been selected by Abu Dhabi Municipality (ADM) to carry out the programme: ¿Air Quality Monitoring Network for Abu Dhabi City Municipality¿. One task of the project is to design a complete air quality monitoring network for the ADM Jurisdiction area.
ADM plays the role of the Sector Regulatory Authority (SRA) for the implementation of the Environment, Health and Safety Management System (EHSMS) in the Building and Construction Sector in the Greater City of Abu Dhabi.
In this light, NILU has selected a number of most appropriate sites to serve this purpose as well and came out with a number of plausible locations detailed further in the report.
This report describes the outcome of site selection survey which took place from 24. to 31. May 2011.
2011
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