Found 10066 publications. Showing page 248 of 403:
Monitoring of long-range transported air pollutants, Annual report for 1999. NILU OR
Air and precipitation chemistry is determined through various monitoring programmes at several sites located in the rural areas of Norway. This report describes the results for 1999, and these are compared to the previous years.
2000
Monitoring of long-range transported air pollutants. Annual report for 2011. NILU OR
Air and precipitation chemistry is determined through various monitoring programmes at several sites located in the rural areas of Norway. This report describes the results for 2011, and these are compared to the previous years.
2012
Monitoring of long-range transported air pollutants. Annual report for 2012. NILU OR
Air and precipitation chemistry is determined through various monitoring programmes at several sites located in the rural areas of Norway. This report describes the results for 2012, and these are compared to the previous years.
2013
Monitoring of microplastics in the Norwegian environment (MIKRONOR)
In 2021 The Norwegian Environment Agency (Miljødirektoratet) assigned the first analyses of microplastics within a national monitoring program “Microplastics in Norwegian coastal areas, rivers, lakes and air (MIKRONOR)” to NIVA. The aim of the program was to build knowledge about the background levels of microplastics in Norwegian environment, as well as identify potential sources and sinks. This is the second annual report, which presents the results from samples of 1) marine and lake/river sediments, biota and water, 2) air and deposition at two sites, including one at Svalbard, and 3) potential sources: urban runoff and effluent of wastewater treatment plants (WWTP) in two cities (Oslo and Hamar). The samples were analysed for microplastics, including tyre wear particles (TWP) from cars. The concentrations of plastic particles (mass of polymers per volume/weight unit) were calculated, using a novel formula for estimating volume of particles from the numerical analysis by spectroscopic (FTIR) analysis. The air samples were analysed for mass concentrations by mass spectrometric analysis. The main findings were the large number and concentrations of particles found in the inner Oslofjord. This included large numbers of microplastic particles resulting in high mass concentrations (μg/g dw) of plastic polymers. Particularly high mass concentrations of TWP were found in the sediments of the inner Oslofjord. TWP were also found at considerably high concentrations in blue mussels from the same area (Akershuskaia). Additionally, the urban runoff samples from both Oslo and Hamar showed high concentrations of TWP. High concentrations of TWP were also found in freshwater sediments near Hamar.
Norsk institutt for vannforskning (NIVA)
2023
Monitoring of microplastics in the Norwegian environment (MIKRONOR) 2023
The MIKRONOR monitoring program aims to establish baseline levels of microplastics in the Norwegian environment and to identify potential sources and sinks. This third MIKRONOR report focuses mainly on results from air samples, including data on tyre wear particles (TWP), as well as river and fjord surface water samples, and their correlation to rainfall and river discharge levels. Additionally, it presents data from sand samples taken from an OSPAR beach in the outer Oslofjord. The results for 2023 provide evidence of the omnipresence of microplastics in the environment. However, levels were higher near cities and populated areas, with decreasing levels further from human activities. This trend was observed in both air and surface water samples. Sand samples from the OSPAR beach in the Oslofjord showed levels of microplastics comparable to, or slightly higher than studied eabches at Svalbard. Since no other beach studies have been conducted in the MIKRONOR program, it is difficult to determine typical microplastic levels on a beach in the outer Oslofjord. Determined levels of microplastics in the beach samples were comparable to levels in marine bottom sediment at remote areas along the coast and lower than levels in sediments from the Oslofjord. Main conclusions of this report highlight the need for further research into the processes that control the levels and variations of microplastics and TWPs, such as weather conditions, river discharge, and air mass movement. Sampling of different matrices should, where possible, be conducted using similar strategies and equipment to improve the comparability of results. Additionally, the high spatial and temporal variability between samples must be considered to determine the appropriate number of analyses needed to obtain reliable results.
Norsk institutt for vannforskning (NIVA)
2024
2022
1999
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2000
Monitoring of micropollutants in fish and shellfish from the Grenland fjords (S. Norway) 2000. NIVA-rapport, 4452-2001
2001
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2001